Exhaust & emissions
Exhaust manifold
Collects burned gas from the cylinders.
Attached to or integrated with the cylinder-head exhaust side.
Individual ports feed a common outlet or turbo passages while containing heat and pressure pulses.
A merging lane for hot exhaust.
Ticking, soot marks or exhaust odor may indicate a leak at a joint or crack.
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.
Some BMW engines integrate exhaust routing into the cylinder-head architecture.
BMW combustion models; petrol and diesel after-treatment components differ by engine and market.
Same system