Refrigerant R134A - Servicing: Specifications Audi S8 D3 facelift

Refrigerant R134a/Refrigerant Oil Capacities and Specifications

> Refrigerant R134a Capacities

> Approved Refrigerant Oils

Refrigerant R134a Capacities

> Capacities for Audi A2 (8Z_) from 2001

> Capacities for Audi A3 (8L_) 1997 to 2004 and Audi TT (8N_) from 1999

> Capacities for A3 (8P_) from 2004

> Capacities for Audi 80 (8A_/8C_), Audi Coupe (8B_), Audi Cabriolet (8G_) through 2002

> Capacities for Audi A4 (8D_) 1995 to 2002

> Capacities for Audi A4 (8E_) from 2001, Audi A4 Cabriolet (8H_) from 2003

> Capacities for Audi 100/Audi A6 (4A_) through 1998

> Capacities for Audi A6 (4B_) from 1998 and Audi Allroad

> Capacities for Audi A6 (4F_) from 2005

> Capacities for Audi V8 (4C_) to 1994

> Capacities for Audi A8 (4D_) 1994 to 2002

> Capacities for Audi A8 (4E_) from 2003

> Capacities for Audi Q7 (4L_) from 2006

Note. When charging the high-pressure side of refrigerant circuits, always fill to the upper tolerance limit (some liquid refrigerant remains in the charging hoses). For compressor assignment ("Zexel" , "Sanden" or "Denso/Nippondenso"), --> 87 - AIR CONDITIONING .

Capacities for Audi A2 (8Z_) from 2001

Characteristics of refrigerant circuit

1. Restrictor (colored)
2. Reservoir
3. "Denso" compressor without A/C clutch and with A/C Compressor Regulator Valve N280

Note. Replacement restrictors with different holes are available (yellow colored 1.54 mm, red colored 1.42 mm). Depending on manufacturer, color of red restrictor may tend more towards orange. To avoid altering the cooling output of the air conditioner, restrictors with the same hole diameter must always be used. A restrictor with a smaller hole (red colored) and a condenser with a smaller internal volume were introduced as of Model Year 2002. The capacity has therefore been slightly modified (condenser -70 g, smaller restrictor +50 g) --> 87 - AIR CONDITIONING .

Capacities for Audi A3 (8L_) 1997 to 2004 and Audi TT (8N_) from 1999

Features of the refrigerant system

1. Expansion valve
2. Receiver
3. Compressor from manufacturers "Sanden" or "Zexel" --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Capacities Audi A3 (8L_) 1997 up to 2004

Note. Exclusive use was made at the start of production of "Sanden" compressors. As of model year 1999, use was also made of "Zexel" compressors --> 87 - AIR CONDITIONING . If no condenser with a flat pipe width of 20 mm is available for Audi A3 as a replacement part, and a condenser with a flat pipe width of 16 mm is installed, only 650 +/- 20 g of refrigerant instead of 750 + 50 g may be filled in. In addition, capacity specification must be changed accordingly on sticker.

Capacities Audi TT (8N_) from 1999

Note. Exclusive use was made at the start of production of "Sanden" compressors. As of model year 1999, use was also made of "Zexel" compressors --> 87 - AIR CONDITIONING . There was a change in production for Audi TT as of 10.03 (from vehicle identification number (VIN) 8N41015239) from condenser with part no. "1J0 820 411 J" (with flat pipe width of 20 mm) to condenser with part no. " 8N0 820 411 A" (with flat pipe width of 16 mm) --> Refrigerant R134a Capacities . From 06.04 to 08.04, a certain number of vehicles not specified were equipped again with condensers having a flat pipe width of 20 mm. Condensers with a flat pipe width of 16 mm require 120 g less of refrigerant than condensers with flat pipe width of 20 mm During production period from 10.03 (vehicles as of vehicle identification no. (VIN) 8N41015239) to 06.04, a condenser with flat pipe width of 16 mm (part no. " 8N0 820 411 A") was installed and 750 + 50 g of refrigerant were filled into the refrigerant circuit. In addition, a sticker indicating the wrong capacity was affixed to these vehicles, i.e. 750 g (or 700 g in 06.04) instead of 650 g --> Refrigerant R134a Capacities . Due to overfilling of the system, the compressor may be switched off under certain circumstances (e.g. high ambient temperatures) since the pressure in the refrigerant circuit is too high; in addition, drivers may complain about the engines performance (e.g. rumbling and buzzing sounds, the engine is heavier loaded as the compressor is working steadily against the excessive pressure). Corrective action: Drain refrigerant circuit, then refill correct capacity and replace sticker with one indicating correct capacity specification, or cross out wrong capacity specification on sticker and note correct capacity e.g. using a waterproof marker. If condenser is replaced, observe flat pipe dimensions. If a condenser with another flat pipe dimension is installed, the sticker specifying the capacity for refrigerant R134a is also to be replaced, or the old capacity specification is to be removed and the new capacity is to be noted e.g. using a waterproof marker Determining dimensions of flat pipes from condenser

1. Flat pipes of condenser - A
2. Width of flat pipes - B

Sticker for capacity of refrigerant R134a

Scheme 1

If condenser is replaced, observe flat pipe dimensions. If a condenser with different dimensions is installed, the sticker - A - specifying the capacity for refrigerant R134a is also to be replaced, or the old capacity specification is to be removed and the new capacity is to be noted e.g. using a waterproof marker

Capacities for A3 (8P_) from 2004

Characteristics of refrigerant circuit

1. Expansion valve
2. Receiver
3. "Denso" , "Sanden" or "Zexel" compressor with A/C Compressor Regulator Valve N280 --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. Various compressors have been installed depending on production period and engine (these compressors have no A/C clutch). At the start of production exclusive use was made of type "7 SEU 16" compressors from "Denso". With effect from Model Year 2004 a gradual change was made to a different "Denso" compressor (type "7 SEU 17"). With effect from Model Year 2004, "Zexel" (type "DSC17E") and "Sanden" (type "PXE16") compressors are gradually being introduced depending on engine --> 87 - AIR CONDITIONING .

Capacities for Audi 80 (8A_/8C_), Audi Coupe (8B_), Audi Cabriolet (8G_) through 2002

Characteristics of refrigerant circuit

1. Restrictor (not colored)
2. Reservoir
3. Compressor from "Zexel" --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. Replacement restrictors with different holes are available. If these vehicles are equipped with a yellow colored restrictor, add 50 g more refrigerant than specified in the table. After charging, amend capacity stated on label or affix label indicating new capacity. In order to distinguish between the two restrictor versions, the one with the smaller hole (1.54 mm) is yellow colored. The restrictor with the larger hole (1.83 mm) is not colored.

Capacities for Audi A4 (8D_) 1995 to 2002

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" or "Zexel" compressor --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. Restrictors with a modified hole have been installed at the factory since November 1997 (yellow colored). The capacity was increased by 50 g for vehicles with yellow colored restrictor. In order to distinguish between the two restrictor versions, the one with the smaller hole (1.54 mm) is yellow colored. The restrictor with the larger hole (1.83 mm) is not colored. The Audi A4 was equipped with different compressors depending on engine and production period. Exclusive use was made at the start of production of "Zexel" compressors. As of Model Year 1996, "Denso" compressors were gradually introduced for vehicles with 6-cylinder engines. Replacement restrictors with different holes (not colored, yellow colored, red colored) are available. If a vehicle is equipped with a different restrictor, add more or less refrigerant depending on type. After charging, amend capacity stated on label or affix label indicating new capacity. Depending on manufacturer, color of red restrictor may tend more towards orange. As of November 1998, Audi A4 models have also been equipped with "AWG" condensers (initially approx. 10000 vehicles with chassis numbers between 8DXA 065 253 and 8DXA 077 026). The specified capacity for vehicles with these condensers differs from those with "Showa" condensers. The condensers can be identified on the basis of certain characteristic features --> Distinguishing features of "Showa" and "AWG" condensers . If the condenser installed is replaced by one with a different part number, check the capacity indicated on the label in the vehicle and amend if necessary or affix a label with the correct capacity over the existing one --> 87 - AIR CONDITIONING .

Capacities for Audi A4 (8E_) from 2001, Audi A4 Cabriolet (8H_) from 2003

Characteristics of refrigerant circuit

1. Restrictor (yellow or red colored)
2. Reservoir
3. "Denso" compressor with A/C Compressor Regulator Valve N280 (without A/C clutch)

Note. Replacement restrictors with different holes are available (yellow colored 1.54 mm, red colored 1.42 mm). Depending on manufacturer, color of red restrictor may tend more towards orange. To avoid altering the cooling output of the air conditioner, red or yellow colored restrictors must only be installed. Yellow colored restrictors were installed in model year 2001. Red colored restrictors were installed as of model year 2002. The restrictor modification (a red colored restrictor may also be installed in vehicles of model year 2001 instead of a yellow colored restrictor) does not alter the capacity for these vehicles. Various compressors have been installed depending on production period and engine (these compressors have no A/C clutch). At the start of production exclusive use was made of type "6 SEU 12" and "7 SEU 16" compressors from "Denso". With effect from Model Year 2004 a gradual change was made to different "Denso" compressors (types "6 SEU 14" and "7 SEU 17") --> 87 - AIR CONDITIONING . For the Audi RS4, a condenser with smaller internal volume is installed, therefore the capacity for this model is less than for other models .

Capacities for Audi 100/Audi A6 (4A_) through 1998

Characteristics of refrigerant circuit

1. Restrictor not colored
2. Reservoir
3. "Denso" or "Zexel" compressor --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. If a vehicle is equipped with a yellow colored restrictor as replacement for a non-colored restrictor, add 50 g more refrigerant than specified in the table. In addition, the capacity specified on the label in the vehicle is to be checked and amended if necessary or the existing label is to be replaced with one indicating the correct capacity (affix over old label). Restrictors with modified hole (colored) have been installed at the factory since November 1997. In order to distinguish between the two restrictor versions, the one with the smaller hole (1.54 mm) is yellow colored. The restrictor with the larger hole (1.83 mm) is not colored. The Audi 100/Audi A6 features different compressors depending on engine and production period. Exclusive use was made at the start of production of "Zexel" compressors. As of Model Year 1996, "Denso" compressors were gradually introduced for vehicles with 6-cylinder engines. From September 1994, production was gradually switched from condenser 4A0 260 403 AB to condenser 4A0 260 403 AC. The refrigerant capacity of 750+50 g applies to all Audi 100 models (regardless of condenser). Only condensers with part number 4A0 260 403 AC are now available as replacement parts (if necessary make use of label, part no. 8A0 010 126 P). After charging refrigerant circuit of vehicles manufactured up to October 1994, check capacity stated on label in vehicle and amend if necessary or affix label, part no. 8A0 010 126 P over existing label (modified capacity) --> 87 - AIR CONDITIONING .

Capacities for Audi A6 (4B_) from 1998 and Audi Allroad

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" or "Zexel" compressor --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. Restrictors with a modified hole have been installed at the factory since November 1997 (yellow colored). The capacity was increased by 50 g for vehicles in which a yellow colored restrictor was installed. In order to distinguish between the two restrictor versions, the one with the smaller hole (1.54 mm) is yellow colored. The restrictor with the larger hole (1.83 mm) is not colored. If a vehicle is equipped with a colored restrictor as replacement for a non-colored restrictor, add 50 g more refrigerant. In addition, the capacity specified on the label in the vehicle is to be checked and amended if necessary or the existing label is to be replaced with one indicating the correct capacity (affix over old label). The Audi A6 is equipped with different compressors depending on the engine and production period. Production was gradually switched in August/September 1998 from air conditioner unit version "1" to air conditioner unit version "2". A reduction in capacity was achieved as the evaporator was also modified together with the air conditioner unit. The two air conditioner unit versions can be identified on the basis of certain characteristics described in the vehicle-specific --> 87 - AIR CONDITIONING .

Note. Condensers with A/C Pressure Switch F129 or High Pressure Sensor G65 are supplied for factory use as part no. XXXXXX 401 X. This condenser is supplied without A/C Pressure Switch F129 or High Pressure Sensor G65 for replacement purposes as part no. XXXXXX 403 X. From 10.98 to 12.98 vehicles with 6-cyl. diesel engine (initially about 10000) were equipped with condensers of a different design. The capacity is different for vehicles with these condensers. The condensers can be identified on the basis of certain characteristics and the part number --> Flat tube dimensions of condenser . The Audi A6 is equipped with different compressors depending on the engine and production period. On condenser replacement, pay attention to index of part number (different flat tube versions, flat tube dimensions 16 mm x 1.7 mm, 18 mm x 1.7 mm or 20 mm x 3 mm) and the different capacities involved. If a condenser with a different part number index is installed, the capacity specified on the label must be checked and amended if necessary or a label indicating the modified capacity must be affixed over the existing label. The part number can be found on a sticker attached to the bottom of the condenser. As of 04.99, production was gradually switched from condensers with flat tube dimensions 20 mm x 3 mm to condensers with flat tube dimensions 18 mm x 1.7 mm or 16 mm x 1.7 mm. The change in production took place gradually during the course of 1999 depending on the engine and existing supplies of the different versions. . Vehicles as of 04.99 with 6-cyl. diesel engine may be equipped with a condenser with index "D" , "G" , "R" or "K". Pay attention to the different capacities --> 87 - AIR CONDITIONING .

Note. The Audi A6 with 8-cyl. engine is equipped with a "Denso" compressor. Production was gradually switched in August/September 1998 from air conditioner unit version "1" to air conditioner unit version "2". Vehicles with 8-cyl. engine are only equipped with air conditioner unit as of version "2". The different air conditioner unit versions can be identified on the basis of certain characteristics described in the --> 87 - AIR CONDITIONING . Different condensers were installed in vehicles with 8-cylinder engines. Exclusive use was made for USA vehicles of condensers with part no. 4B3 260 401 (403) C, D, E. In March 1999, production was gradually switched from condensers with part no. 4B3 260 401 (403) B to condensers with part no. 4B3 260 401 (403) C. If the condenser installed is replaced by one with a different part no., amend capacity specified on label or affix label with modified capacity over existing label. The part number can be found on a sticker attached to the bottom of the condenser --> 87 - AIR CONDITIONING .

Capacities for Audi A6 (4F_) from 2005

Characteristics of refrigerant circuit

1. Restrictor (red colored)
2. Reservoir
3. "Denso" compressor with A/C Compressor Regulator Valve N280 (without A/C clutch)

Note. Replacement restrictors with different holes are available (yellow colored 1.54 mm, red colored 1.42 mm). Depending on manufacturer, color of red restrictor may tend more towards orange. To avoid altering the cooling output of the air conditioner, only red colored restrictors are to be installed. Different compressors are installed depending on model --> 87 - AIR CONDITIONING .

Capacities for Audi V8 (4C_) to 1994

Characteristics of refrigerant circuit

1. Restrictor (not colored)
2. Reservoir
3. Compressor from "Zexel" --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. Replacement restrictors with different holes are available. If these vehicles are equipped with a yellow colored restrictor, add 50 g more refrigerant than specified in the table. After charging, amend capacity stated on label or affix label indicating new capacity. In order to distinguish between the different restrictor versions, the ones with a smaller hole are colored (yellow or red). The red colored restrictor is not to be used for these vehicles. Depending on manufacturer, color of red restrictor may tend more towards orange.

Capacities for Audi A8 (4D_) 1994 to 2002

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" or "Zexel" compressor --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. Restrictors with a modified hole have been installed at the factory since November 1997 (yellow colored). The capacity was increased by 50 g for vehicles with yellow colored restrictor. In order to distinguish between the different restrictor versions, the ones with the smaller hole are colored yellow (1.54 mm) or red (1.42 mm). The restrictor with the larger hole (1.83 mm) is not colored. If a vehicle is equipped with a yellow colored restrictor as replacement for a non-colored restrictor, add 50 g more refrigerant. In addition, the capacity specified on the label in the vehicle is to be checked and amended if necessary or the existing label is to be replaced with one indicating the correct capacity (affix over old label). The red colored restrictor is not to be used for these vehicles. Exclusive use was made at the start of production of "Zexel" compressors. As of Model Year 1996, production was gradually switched to "Denso" compressors --> 87 - AIR CONDITIONING .

Capacities for Audi A8 (4E_) from 2003

Characteristics of refrigerant circuit

1. Restrictor (red colored)
2. Reservoir
3. "Denso" compressor with A/C Compressor Regulator Valve N280 (without A/C clutch)

Note. Replacement restrictors with different holes are available (yellow colored 1.54 mm, red colored 1.42 mm). Depending on manufacturer, color of red restrictor may tend more towards orange. To avoid altering the cooling output of the air conditioner, only red colored restrictors are to be installed. Different compressors are installed depending on model --> 87 - AIR CONDITIONING .

Capacities for Audi Q7 (4L_) from 2006

Characteristics of refrigerant circuit

1. Expansion valve
2. One or two evaporator(s)
3. Dryer cartridge in fluid reservoir on condenser
4. "Denso" compressor with A/C Compressor Regulator Valve N280 --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Refrigerant Oil Capacities

Note. For compressor assignment ("Zexel" , "Sanden" or "Denso"), refer to vehicle-specific --> 87 - AIR CONDITIONING . With "Zexel" , "Denso" and "Sanden" compressors, the amount of refrigerant oil in the replacement compressor corresponds to the total quantity of oil to be added. On compressor replacement, the quantity of refrigerant oil in the compressor to be installed must therefore be adjusted (an incorrect refrigerant oil quantity will damage the compressor). When pouring refrigerant oil out of replacement compressor (or malfunctioning compressor), a small quantity of oil generally remains in the compressor (20 to 30 cm 3 ). This refrigerant oil does not affect the function of the air conditioner and can therefore be ignored (always remains in compressor). Following initial switch-on, the refrigerant oil is distributed throughout the entire refrigerant circuit. For refrigerant oil replenishment quantities on replacing malfunctioning refrigerant circuit components, refer to --> Refrigerant Circuit Components, Replacing --> 87 - AIR CONDITIONING .

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. Compressor with A/C Compressor Regulator Valve N280 (without A/C clutch)
4. Compressor from "Denso" --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . As the compressor and engine always operate at the same time and the entire quantity of refrigerant oil is contained in the compressor, the circuit must be completely assembled before starting the engine --> 87 - AIR CONDITIONING . As replacement compressors of this type are supplied with different oil capacities, the exact part no. must be noted .

Characteristics of refrigerant circuit

1. Expansion valve
2. Receiver
3. "Sanden" or "Zexel" compressor --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . Exclusive use was made at the start of production of "Sanden" compressors. With effect from Model Year 1999, use was also made of "Zexel" compressors --> 87 - AIR CONDITIONING .

Capacities for Audi A3 (8P_) from 2004

Characteristics of refrigerant circuit

1. Expansion valve
2. Receiver
3. Compressor from various manufacturers with A/C Compressor Regulator Valve N280 (without A/C clutch) --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000) .

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . Different compressors are installed depending on production period and engine. At the start of production, exclusive use was made of compressors of type "7 SEU 16" from "Denso" (e.g. compressor with part no. 1K0 820 803 up to index "D"). In Model Year 2004 (as of approx. 10.03), a gradual change was made to a different type of "Denso" compressor ("7 SEU 17" e.g. compressor with part no. 1K0 820 803 as of index "E"). With effect from Model Year 2004 (as of approx. 10.03), "Zexel" (type "DSC17E") and "Sanden" (type "PXE16") compressors are also gradually being introduced depending on engine . This compressor is available as a replacement part with different oil capacities and attention must therefore be paid to oil quantity in compressor as well as exact part number --> 87 - AIR CONDITIONING . The reason for the different oil quantities in the compressor for an otherwise identical refrigerant circuit is the design of the actual compressor. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and reduced system cooling output; insufficient oil can cause lubrication problems in the compressor. The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.

Capacities for Audi 80 (8A_/8C_), Audi Coupe (8B_), Audi Cabriolet (8G_)

Characteristics of refrigerant circuit

1. Restrictor (not colored)
2. Reservoir
3. Compressor from "Zexel" --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing .

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" or "Zexel" compressor --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . The Audi A4 is equipped with different compressors depending on the engine and production period --> 87 - AIR CONDITIONING .

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" compressor with A/C Compressor Regulator Valve N280 (without A/C clutch) --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . The Audi A4 is equipped with different compressors depending on the engine and production period As replacement compressors of this type are supplied with different oil capacities, the exact part no. must be noted --> 87 - AIR CONDITIONING . At the start of production, the compressor types in the first line of the table were supplied with a refrigerant oil quantity of 180 cm 3 . These compressors can be recognized from the index of the part number (8E0 260 805 with one index or with double index up to "AH"). In Model Year 2004 (as of approx. 01.04), a gradual change was made to other types of compressor with a refrigerant oil quantity of 120 cm 3 or 130 cm 3 . These compressors can be recognized from the index of the part number 8E0 260 805 (with double index as of " AJ") or 4F0 260 805 (and index "E" for vehicles with 8-cyl. engine) . The reason for the different oil quantities in the compressor for an otherwise identical refrigerant circuit is the design of the actual compressor. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and reduced system cooling output; insufficient oil can cause lubrication problems in the compressor. The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.

Capacities for Audi 100/Audi A6 (4A_) from 1998

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" or "Zexel" compressor --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . The Audi 100/Audi A6 features different compressors depending on engine and production period. Exclusive use was made at the start of production of "Zexel" compressors. As of Model Year 1996, "Denso" compressors were gradually introduced for vehicles with 6-cylinder engines --> 87 - AIR CONDITIONING .

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" or "Zexel" compressor with A/C Clutch N25 --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . The Audi A6 is equipped with different compressors depending on the engine and production period. As of Model Year 2002, the Audi A6 features compressors with A/C clutch or regulator valve (different oil quantities) depending on the engine. This change is being introduced gradually for the Audi Allroad with 6-cyl. diesel engine in Model Year 2003 --> 87 - AIR CONDITIONING .

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" compressor with A/C Compressor Regulator Valve N280 --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . The Audi A6 is equipped with different compressors depending on the engine and production period. As of Model Year 2002, the Audi A6 features compressors with A/C clutch or regulator valve (different oil quantities) depending on the engine. This change is being introduced gradually for the Audi Allroad with 6-cyl. diesel engine in Model Year 2003. As the replacement compressor with A/C Compressor Regulator Valve N280 is supplied with different oil capacities, the exact part no. must be noted --> 87 - AIR CONDITIONING . The reason for the different oil quantities in the compressor for an otherwise identical refrigerant circuit is the design of the actual compressor. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and reduced system cooling output; insufficient oil can cause lubrication problems in the compressor. The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" compressor with A/C Compressor Regulator Valve N280 --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted. The Audi A6 is equipped with different compressors depending on the engine and production period. As there are different replacement versions of this compressor, the exact part no. must be noted --> 87 - AIR CONDITIONING . The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.

Characteristics of refrigerant circuit

1. Restrictor (not colored)
2. Reservoir
3. Compressor from "Zexel" --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing .

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. Compressor from "Denso" or "Zexel" --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . At the start of production, only Zexel compressors were used. As of Model Year 1996, production was gradually switched to "Denso" compressors --> 87 - AIR CONDITIONING .

Characteristics of refrigerant circuit

1. Restrictor
2. Reservoir
3. "Denso" compressor with A/C Compressor Regulator Valve N280 --> «87 - AIR CONDITIONING»(ref-289225-S23986356182008062700000)

Note. The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted --> Refrigerant Circuit Components, Replacing . The Audi A8 is equipped with different compressors depending on the engine and production period. As replacement compressors of this type are supplied with different oil capacities, the exact part no. must be noted --> 87 - AIR CONDITIONING . At the start of production, the compressor types in the first two lines of the table were supplied with a refrigerant oil quantity of 200 cm 3 . These compressors can be recognized from the index of the part number (4E0 260 805 with index "C" , "D" , "E" , "F" , "J" , "L" or "S"). In Model Year 2004 (as of approx. 01.04), a gradual change was made to other types of compressor with a refrigerant oil quantity of 150 cm 3 . These compressors can be recognized from the index of the part number (4E0 260 805 with index "G" , "H" , "T" , "M" , "N" , "Q" or double index e.g. " AB") . The reason for the different oil quantities in the compressor for an otherwise identical refrigerant circuit is the design of the actual compressor. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and reduced system cooling output; insufficient oil can cause lubrication problems in the compressor. The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.

Note. The replacement compressor is already filled with a specific refrigerant oil quantity (currently 140 or 150 + /- 10 cm 3 , depending on the compressor). This refrigerant oil quantity corresponds to the oil quantity designated for this refrigerant circuit on vehicles with one evaporator. On vehicles with two evaporators, a greater refrigerant oil quantity is required in the refrigerant circuit (currently an additional 100 cm 3 ) because of the longer refrigerant lines and the second evaporator. If the compressor is replaced after cleaning the refrigerant circuit, this refrigerant oil quantity must therefore be added to the refrigerant circuit (e.g. into opened lines or component connections) in vehicles with two evaporators. If compressor is replaced without having to clean the refrigerant circuit, the refrigerant oil quantity in the new compressor to be installed must be adjusted to the oil quantity poured out of the old compressor --> Refrigerant Circuit Components, Replacing . Compressors are available as replacement part with different oil fill capacities, therefore note exact part number . Too much oil in the circuit leads to higher pressures and reduces cooling performance of the A/C system. Too little oil may lead to lubrication problems in the compressor, therefore note the specified refrigerant oil quantities. A data plate may be attached to the compressor by the manufacturer, indicating the part number and refrigerant oil quantity.