How a car works

All partsBMW M4 CSLS58 engineBelt drive › Serpentine belt

Serpentine belt

Part of Belt drive · about $45 to replace

What it is

Six-rib poly-V belt.

What it does

Transmits crank torque to the accessories.

How it fails

Replace at 100,000 km.

MaterialEPDM rubber with polyester cords
Spec6PK 1,650
Serpentine belt highlighted on the car

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