Cooper S (R56) L4-1.6L Turbo (N18) (2011)
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Exhaust System: Technical Service Bulletins
Exhaust System - Popping Sound On Deceleration
SI M18 02 10
Exhaust Systems
Technical Service
SUBJECT
N18 - Cooper S Exhaust Popping Sound
MODEL
R55 Cooper Clubman S, R56 and R57 Cooper S and R60 Cooper Countryman S with N18 engine
SITUATION
The vehicle exhibits an acoustic feedback (popping) of the exhaust system under the following conditions:
^ "Sport" mode activated
^ Engine braking during deceleration in 1st, 2nd, or 3rd gear
The popping noise from the exhaust system can also be described as a "backfire" from the engine.
INFORMATION
The "Sport Mode" exhaust acoustic feedback is considered a normal operation/characteristic of the N18 engine, enhancing the vehicle's sporty heritage.
No diagnostic or repair attempts should be conducted for such a condition.
WARRANTY INFORMATION
For information only
