Active M Differential
Varies rear-axle differential locking to help manage drive torque.
In the rear differential on equipped BMW M models.
Electronic control commands locking based on vehicle and driver inputs rather than a permanently fixed lock.
A smart power-sharing gate between the rear wheels.
Warnings or traction changes can involve sensors, control or the differential assembly.
Use the exact gearbox and axle service guidance. Loads, seals, lubricant condition and driving use influence wear.
An accessible mount or seal differs from internal transmission work. Gearbox identification and diagnosis are essential to a useful quote.
BMW’s Active M Differential uses vehicle signals such as wheel speed and yaw to inform control.
Equipped BMW M models; the F10 M5 manufacturer description is one documented example. Other axle differentials work differently.