All parts › BMW M4 CSL › S58 engine › Turbochargers › Turbo 1 (cyl 1–3) › Wastegate
Wastegate
Part of Turbo 1 (cyl 1–3) · about $380 to replace
What it is
Electrically actuated flap in the turbine housing.
What it does
Bypasses exhaust around the turbine to cap boost.
How it fails
Rattle at idle is a worn flap pivot; the actuator is recalibrated with a scan tool.
| Material | Stainless flap, electric actuator |
|---|---|
| Spec | Actuator travel 12 mm |
| 0–100 % in 120 ms |