Active M differential

Part of Drivetrain · about $4,200 to replace

What it is

Electronically controlled limited-slip differential.

What it does

Splits torque between rear wheels; locks up to 100 % on demand.

How it fails

Oil change every 50,000 km; whine on overrun means ring and pinion.

Material	Aluminium housing, steel gears, multi-plate clutch
Spec	3.15:1
	0–100 % lock in 150 ms
	1.5 l oil

Inside this part

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