it depends on what model you have, the obvious place would be in the brake fluid resevior mounteing the servo.
can u show me where the brake fluid resevior on a 1998 bmw 528i is located
brake fluid type and filling location
DOT 4 brake fluid
BMW Dealerships...
Type Dot 4 Brake Fluid Will Be Ok
no
Dot 4
is the brake fluid
You can add brake fluid inside the brake fluid reservoir. The reservoir is located on the driver's side under the micro-filter panel.
On the drivers side firewall
The brake fluid reservoir on a BMW 525i is located along the right, rear of the engine compartment. It is connected to the power booster which aids in braking via vacuum pressure.
For a BMW 525i, you should use brake fluid that meets the specifications of DOT 4. This type of brake fluid provides the necessary performance and temperature resistance required for the vehicle's braking system. Always check the owner’s manual for specific recommendations and ensure the fluid is compatible with your vehicle’s requirements. Regularly inspect and replace brake fluid as part of routine maintenance.