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Group 34 Brake Service Bulletins

Bulletin number

Title

Description

Date of issue

34 03 83 (742) Replacing front brake pads. Dust seal can get caught between piston and pad, causing damage to the seal. May 1983
34 05 83 (763) Floating brake caliper guide bolts, 318i. Do not lubricate slide bolts September 1983
34 03 85 (1130) Brake lining wear warning system. Describes operation of the brake lining light January 1986
34 02 86 (1204) ABS sensor wire harness routing prior to 2/86. Re-route harness in engine bay, install mounting clip P/N 61 13 1 371 074 for connector June 1986
34 03 86 (1228) Bleeding brakes on ABS equipped cars. Reinforcing the need to pump pedal 12 times while bleeder is open on ABS systems May 1988
34 06 86 (1292) Brake pads and brake shoes. Asbestos warning while handling brake pads November 1986
34 03 87 (1407) Routing of wires for brake pad wear sensors. Ensure correct routing when changing pads, cable must go through bleed valve dust cap, P/N 34 11 1 153 198 June 1987
34 01 88 (1555) ABS warning light. False light after tire changes, check all tires are same size and preferably same brand January 1988
34 02 88 (1585) Brake disc checking. New tools for checking rotor condition February 1988
34 03 88 (1671) ABS indicator - defective diode, after 9/87 production. Relocation of diode into valve relay from hydraulic unit to lower repair costs if diode fails May 1988
34 05 88 (1755) Brake dust shields. Lists dangers of using such components, recommends against them November 1988
34 06 88 (1784) Troubleshooting ABS system Check for and replace loose pulse rings on front wheel bearings. February 1989
34 01 89 (1850) ABS sensor lead faults / repair procedure Introduction of repair leads, to remove the need to replace complete harness. P/N 61 13 9 061 687 May 1989
32 02 89 (1857) ABS warning light illumination Adapter harness for installation of DME 1.3 control units into 325iX produced until end of 5/88 production August 1989
34 04 89 (1902) ABS control units E30 except 325iX Elimination of over voltage protection relay as of 1/89 production. ABS control unit now contains protection diode. July 1989
34 05 89 (1968) ABS control units 325iX Elimination of over voltage protection relay as of 4/89 production. ABS control unit now contains protection diode. January 1990
 

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E30 M3 Repair Manual V2.7.  Copyright ©1999-2001 Koala Motorsport & Brett Anderson