BMW 318/325/M3/525/535/M5 1989-1993 Repair Information

Bleeding & Fluid Change


See Figures 1 and 2

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Fig. Fig. 1: Bleeding the front brakes. Replace the bleeder cover when done

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Fig. Fig. 2: Bleeding the rear brakes. Replace the bleeder cover when done

To ensure continued proper operation of the braking system, the brake fluid must be changed at least every 2 years. If the vehicle is used for heavy duty use, change the fluid at least once a year. If the vehicle is used in competition or drivers schools, bleed the system before and after each event.

Use a quality, name brand DOT 4 brake fluid. Use fluid from sealed, unused cans. Buy the fluid in quantities that you expect to use. Buying a large container of fluid and only using a small portion can lead to the remaining fluid to become contaminated over time. Brake fluid absorbs moisture and can lead to system corrosion.

Always use clean, factory approved brake fluid.

This procedure is valid for E30 3 Series with or without ABS. The procedure also is valid for E34 5 Series without ASC+T. To bleed the E36 3 Series or the E34 5 Series with ASC+T special tools and procedures are required. If the special procedures are not performed in accordance to BMW requirements, the brake system may not completely bleed. This will lead to improper brake system operation and potential injury or death.

  1. Fill the master cylinder to the maximum level with the proper brake fluid.
  3. Raise and safely support the vehicle. Remove the protective caps from the bleeder screws.
  5. The proper bleeding sequence always start with the brake unit farthest from the master cylinder. The proper bleeding sequence is: right rear, left rear, right front and left front.
  7. Insert a tight fitting plastic tube over the bleeder screw on the caliper and the other end of the tube in a transparent container partially filled with clean brake fluid.
  9. Depress the brake pedal and loosen the bleeder screw to release the brake fluid. Pump the brake pedal to the stop at least 12 times. Tighten the bleeder screw when the escaping brake fluid is free of air bubbles.
  11. Repeat this step on all 4 wheels. Torque the 7mm bleeders to 3.5 ft. lbs. (5 Nm) and the 9mm bleeders to 4.3 ft. lbs. (6 Nm). Replace the bleeder dust covers. Lower the vehicle and check the brake fluid level.