Rear exhaust silencer
Reduces exhaust noise before gas leaves the tailpipe.
Near the rear of the underbody.
Chambers, perforated tubes and absorbent materials shape sound; some designs include controlled flaps.
An acoustic maze that softens pressure pulses.
Rattles, corrosion or louder exhaust can involve mounts, shells or internal damage.
Condition, contamination, operating pattern and the underlying engine matter more than a universal age limit.
Sensors and joints differ greatly from complete after-treatment assemblies. First repair the cause of contamination or abnormal combustion.
BMW M and standard exhaust designs may use different silencers and controls despite similar visible tips.
BMW combustion models; petrol and diesel after-treatment components differ by engine and market.