All parts › BMW M4 CSL › Wheel assemblies › Front left wheel › Caliper pistons
Caliper pistons
Part of Front left wheel · about $160 to replace
What it is
Pistons inside the caliper.
What it does
Convert hydraulic pressure into clamping force.
How it fails
Corrosion behind the dust seal seizes them.
| Material | Stainless steel, titanium heat shields |
|---|---|
| Spec | 6 pistons |
Appears at
Front left wheelFront right wheel