18 00 020 Removing and installing complete exhaust system (M54/N52)
Special tools required
- 31 2 220
| WARNING | Scalding hazard! Only perform these tasks after exhaust system has cooled down. |
Support exhaust system with jack and special tool 31 2 220 and secure against falling out.
Scheme 1
| IMPORTANT | Removal of the exhaust system must be carried out with the assistance of a second person. |
Pull off vacuum hose (1).
Scheme 2
Unscrew nuts.
Unfasten screws.
Scheme 3
Release nuts (1) and remove complete exhaust system.
Scheme 4
Installation
Replace nuts.
18 12 030 Replacing rear muffler (M54/N52)
Special tools required
- 00 2 210
| WARNING | Scalding hazard! Only perform these tasks after exhaust system has cooled down. |
Cutting line (4) between center muffler (3) and rear muffler (5).
Scheme 5
Determine pipe length on new rear muffler (5).
Carry over dimensions to faulty rear muffler (5) and mark cutting line.
Cut exhaust pipe with special tool 00 2 210 at marked points and deburr.
Scheme 6
Pull off vacuum hose (1).
Scheme 7
Release nuts and remove rear muffler.
Connect rear muffler (5) using clamping sleeve.
Scheme 8
Installation
Align clamping sleeve so that
- Nuts point downwards.
- Cutting line is in middle of clamping sleeve.
- There is sufficient spacing to adjoining components.
18 12 040 Removing and installing/replacing front muffler (M54/N52)
Special tools required
- 00 2 210
| WARNING | Scalding hazard! These tasks should only be carried out on an exhaust system that has cooled down! |
Cutting line (2) between front muffler (1) and center muffler (3).
Scheme 9
Determine pipe length on new front muffler (1).
Carry over dimension to faulty front muffler (1) and mark cutting line.
Cut exhaust pipes with special tool 00 2 210 at marked points and deburr.
Scheme 10
Unscrew nuts (1).
Scheme 11
Installation
Replace self-locking nuts.
Installation
Replace both seals (1).
Scheme 12
Connect front muffler (1) to center muffler (3).
Scheme 13
Installation
Align clamping sleeves so that
- Nuts point downwards.
- Cutting line is in middle of clamping sleeve.
- There is sufficient spacing to adjoining components.
18 12 045 Replacing center muffler (M54/N52)
Special tools required
- 00 2 210
- 31 2 220
| WARNING | Scalding hazard! Only perform these tasks after exhaust system has cooled down. |
Support exhaust system with jack and special tool 31 2 220 and secure against falling out.
Scheme 14
Unfasten screws.
Scheme 15
Cutting line (2) and (4) between front muffler (1) and rear muffler (5).
Scheme 16
Determine pipe length on new center muffler (3).
Carry over measurement to faulty center muffler (3) and mark cutting lines.
Cut exhaust pipes with special tool 00 2 210 at marked points and deburr.
Scheme 17
Connect center muffler (3) to front muffler (1) and rear muffler (5).
Scheme 18
Installation
Align clamping sleeves so that
- Nuts point downwards.
- Cutting line is in middle of clamping sleeve.
- There is sufficient spacing to adjoining components.
18 40 050 Removing and installing/replacing front exhaust manifold (M54/N52)
Necessary preliminary tasks
- Secure engine in installation position.
- Remove reinforcement plate
- Remove complete exhaust system, refer to «18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM»(/bmw/x3/e83-2003-2006/remont/exhaust/#exhaust-system-repair__18-00-020-removing-and-installing)
- Detach grounding cable from body.
- Remove right engine support arm with engine mount
- M54: Remove air pump
Note. The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.
Remove front control sensor. Refer to 11 78 511 REPLACING OXYGEN CONTROL SENSOR (CYLINDERS 1-3) .
Remove cover from fuel injectors.
Scheme 19
Note. Do not mix up monitor sensors for cylinders 1 to 3 and 4 to 6 at plug connection to wiring harness. Mark plug connections. Unclip cable from holder. Disconnect plug connection. Unclip cable on rear side of engine from cable guide.
Remove monitor sensor from cylinders 1 to 3. Refer to 11 78 611 REPLACING OXYGEN MONITOR SENSOR (CYLINDERS 1-3) .
Unscrew nuts.
Scheme 20
Remove exhaust manifold (1).
Installation
Clean sealing faces, replace gaskets.
Replace nuts.
Tightening torque 11 62 1AZ. Refer to ENGINE - TIGHTENING TORQUES .
18 40 060 Removing and installing/replacing rear exhaust manifold (M54/N52)
Necessary preliminary tasks
- Remove reinforcement plate
- Remove complete exhaust system, refer to «18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM»(/bmw/x3/e83-2003-2006/remont/exhaust/#exhaust-system-repair__18-00-020-removing-and-installing)
- M54: Remove air pump
Note. The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.
Remove rear control sensor. Refer to 11 78 512 REPLACING OXYGEN CONTROL SENSOR (CYLINDERS 4-6) .
Remove cover from fuel injectors.
Scheme 21
Note. Do not mix up monitor sensors for cylinders 1 to 3 and 4 to 6 at plug connection to wiring harness. Mark plug connections. Unclip cable from holder. Disconnect plug connection. Unclip cable on rear side of engine from cable guide.
Remove monitor sensor from cylinders 4 to 6. Refer to 11 78 612 REPLACING OXYGEN MONITOR SENSOR (CYLINDERS (4-6) .
Unscrew nuts.
Scheme 22
Remove exhaust manifold (1).
Installation
Clean sealing faces, replace gaskets.
Replace nuts.
Tightening torque, see 11 62 1AZ in ENGINE - TIGHTENING TORQUES .
See also:
• 11 78 511 REPLACING OXYGEN CONTROL SENSOR (CYLINDERS 1-3)
• 11 78 611 REPLACING OXYGEN MONITOR SENSOR (CYLINDERS 1-3)
• ENGINE - TIGHTENING TORQUES
• 11 78 512 REPLACING OXYGEN CONTROL SENSOR (CYLINDERS 4-6)
• 11 78 612 REPLACING OXYGEN MONITOR SENSOR (CYLINDERS (4-6)
• 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM