Ignition System - MIL ON/Runs Rough/Misfire DTC's Set
SI B 12 08 03Engine Electrical
March 2005
Technical Service
This Service Information bulletin supersedes S.I. 12 08 03 dated February 2005.
[NEW] designates changes to this revision
SUBJECT
BREMI Ignition Coil Replacement on M54, M56, N62 and N73 Engines
MODEL
E46 with M54 from 09/02 up to 10/04 E46 SULEV with M56 from 09/02 up to 10/04 E39 with M54 from 09/02 up to 07/03
E53, X5 3.0 with M54 from 09/02 up to 10/04
E53, X5 4.4 with N62 from 10/03 up to 10/04
E85, Z4 with M54 from series introduction up to 10/04
E83 X3 with M54 from series introduction up to 10/04 E60 with M54 or N62 from series introduction up to 10/04
E65/66 with N62/N73 from series introduction up to 10/04
SITUATION
Engine may run rough and "Check Engine" light is illuminated. Misfire faults are stored in DME control module.
CAUSE
Reduced ignition firing power of BREMI coils due to coil internal insulation deterioration.
CORRECTION
Follow the appropriate Test Plan from DIS Plus/GT1.
If BREMI ignition coil is found to be defective, all (six, eight, or twelve) coils must be replaced with Bosch ignition coils (PN 12 13 1 712 219). For replacement instructions refer to RA 12 13 511 found in BMW TIS.
Only coils manufactured by BREMI are affected. BREMI coils are easily recognizable by the all black, shiny housings.
Bosch coils, recognized by silver aluminum housing, are not affected and should NOT be replaced as a set.
Important Note:
E46 M3 and E36/7 M roadster/coupe vehicles with S54B32 engines are not affected by this Service Information. Only BREMI coils should be used on S54 engine. Please refer to SIB 12 02 04 (03/2005) in case of ignition coil failure on M3/M roadster/M coupe vehicles.
PARTS INFORMATION
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.