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Brake Fluid Replacement Instructions

Model: BMW Serie 5 E39 - Years 1995-2003
Part: Brake pads

Brake fluid, incorrectly referred to as brake oil, is essential for hydraulic braking systems, allowing the brake mechanism to operate without compressing, boiling, corroding the braking system, or causing rust formation. It is necessary to replace the fluid if it absorbs too much moisture and risks corroding the braking system. One technique for renewing the fluid involves emptying the circuit by vacuum, using a hydraulic circuit vacuum tool, or a syringe. By applying this method to the open bleed screw, it is possible to remove the brake fluid and speed up the filling process. If you do not have this tool, you can lower the fluid level in the reservoir to the minimum by bleeding the caliper while continuing to pump the brake pedal and filling with new fluid until only the new fluid flows out.

Updated on 16 February 2026 by ScegliAuto

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