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These tasks should only be carried out on an exhaust system that has cooled down!
Remove engine underguard at rear.
Detach exhaust system from exhaust manifolds.
Push exhaust system back.
The connections between exhaust manifolds/exhaust pipes and the catalytic converters are only fitted with sealing rings on the inner tubes.
- Without sealing ring (outside)
- With sealing ring (inside)
Replace sealing ring.
Replace self-locking nuts and screws. Coat threads with copper paste, refer to BMW Parts Service.