Parking-brake actuator
Applies a holding brake when the car is parked.
At rear calipers or a separate cable mechanism, depending on model.
An electric motor or mechanical lever applies a parking-brake mechanism independent of normal pedal input.
A dedicated hand holding the stopped car.
Failure to apply or release can involve power, actuator, cables or the brake mechanism.
Pads and discs are measured wear items. Driving, environment and regenerative braking change wear; use the actual inspection limits.
Ordinary friction service differs greatly from carbon-ceramic replacement or hydraulic-controller work; obtain a vehicle-specific quote.
BMW electronic parking-brake hardware differs between generations and rear-brake designs.
BMW models with hydraulic friction brakes; performance equipment and parking-brake design vary.