1.0 General Information
LHM hydraulic fluid has a favorable viscosity range and permits problem-free operation of the self-leveling rear suspension at very low and very high temperatures. The solidification point is -78°F/-61°C.
E24, E28 produced prior to 9/87
Pentosin CHF 4548 was used for initial factory filling.
For filling up and replacement the following oil is to be used
Pentosin CHF 7.1 BMW Part No. 81 22 1 468 879
Pentosin CHF 4548 and CHF 7.1 can be mixed in these cars.
For complete system oil replacement
Reputable brand name LHM oils (green color) can also be used (Shell, Castrol, Exxon, etc.)
Note. Mixing of CHF and LHM oils is not permitted.
E24, E28 produced since 9/87
Pentosin CHF 7.1 is used for initial factory filling.
For filling up and replacement use only Pentosin CHF 7.1
BMW Part No. 81 22 1 468 879
For complete oil replacement
Reputable brand name LHM oils (green color) can also be used.
Note. Mixing of CHF 7.1 and LHM oils is not permitted.
E32 produced prior to 9/91
Use only Pentosin CHF 7.1.
Mixing with other oils is not permitted.
E32, E34 produced since 9/91
Use only Pentosin CHF 11S
Note. All cars have a label indicating the respective type on the hydraulic fluid reservoir. Since both Pentosin CHF 11S and CHF 7.1 are green in color, the reservoir label must be carefully checked prior to adding fluid.
Mixing CHF 11S and CHF 7.1 is not permitted.
Pentosin CHF 11S BMW Part No. 82 11 1 468 041
E38 produced since 1/94
Use only Pentosin CHF 11S
Note. All cars have a label indicating the respective type on the hydraulic fluid reservoir. Since both Pentosin CHF 11S and CHF 7.1 are green in color, the reservoir label must be carefully checked prior to adding fluid.
Mixing CHF 11S and CHF 7.1 is not permitted.
Pentosin CHF 11S BMW Part No. 82 11 1 468 041
3.0 Checking Hydraulic Fluid Levels
The hydraulic fluid level must be checked on an unloaded car and at every Inspection I or, for cars without a Service Indicator, at 10,000 mi/15,000 km intervals.
Note. Not required as of 1993 model year vehicles.
Special checking instructions apply to the E32 - always refer to the latest edition of the Repair Instructions.
Note. Never fill above the " max" mark. There are no replacement intervals for hydraulic fluid.