Air & turbo
Turbo wastegate
Diverts exhaust around the turbine to help control boost.
On or beside the turbo turbine housing.
A controlled flap routes some gas around the turbine; actuator type depends on the turbo system.
A bypass lane controlling how hard a windmill is driven.
Boost-control faults or rattling can involve linkage, actuator, sensors or leaks.
Filters follow the vehicle service schedule; ducts and boost hardware are inspected for condition, sealing and operation.
A hose or filter is generally simpler to service than a turbo assembly. Access and diagnosis can dominate cost.
A wastegate and an intake-side diverter valve perform different jobs on a turbo BMW.
BMW combustion models; boost hardware applies to turbocharged engines only.
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