Seat and Mirror - Memory Malfunctions

Group 52
Seats

Bulletin Number
52 02 95 (4163)

Woodcliff Lake, NJ
February 1995
Product Engineering

SUBJECT:
Seat and Mirror Memory Malfunctions.

MODELS:
5 Series (E34), 7 Series (E32) - Vehicles so equipped and produced 9/93 and later.

Situation:
5 and 7 Series vehicles produced 9/93 and later, and equipped with Seat and Mirror Memory, may sporadically exhibit either of two types of malfunction, as follows

1. The seat and mirrors will not operate at all, and diagnosis with the MoDiC or DIS Tester is not possible; or,

2. Seat and mirror adjustments are carried out in the opposite direction of switch movement (e.g., if the seat switch is moved forward, the seat moves backward), and diagnosis with the MoDiC or DIS Tester is not possible.

In either type of malfunction, removing and restoring power from the control module (by fuse removal) restores proper operation, with no faults stored in the fault code memory.

Cause:
Interference between the motor, circuits and the processor of the control module.

Correction:
Replace the control module (P/N 61 35 8 356 510) with one bearing a yellow part number label. These control modules have been modified to incorporate additional protection against interference. Unmodified control modules bear a white part number label.

Until the Parts Department stock is cleared of unmodified control modules, the modified modules can be direct shipped from BMW AG by contacting the BMW NA Parts Department.