How a car works

All partsBMW M4 CSLElectrical system › Wiring harness

Wiring harness

Part of Electrical system · about $2,200 to replace

What it is

Engine-bay harness.

What it does

Connects sensors, actuators and the ECU.

How it fails

Chafe at the cam-cover edge; rodent damage on garaged cars.

MaterialPVC/XLPE copper wire, PA convolute
Spec~180 m of wire in the engine bay alone
Wiring harness highlighted on the car

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