Brake-fluid reservoir
Stores the fluid supply for the hydraulic braking system.
Above or connected to the brake master cylinder.
The reservoir allows level monitoring and feeds the hydraulic circuit; specified fluid compatibility matters.
The supply tank above a hydraulic pump.
Low level may reflect pad wear or a leak and should not be treated as a refill-only problem.
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 brake-fluid maintenance is time- and model-specific; fluid type must follow the vehicle specification.
BMW models with hydraulic friction brakes; performance equipment and parking-brake design vary.