S I B 12 17 05
Engine Electrical Systems
September 2005
Technical Service
This Service Information bulletin supersedes S.M. B12 209 05 dated
4/6/2005.
SUBJECT
M54B30 MS45.1; Engine Power Drops at 4000 RPM
MODEL
E46, E60, E85 with M54B30 engine and manual transmission only
SITUATION
The customer may complain of an engine power drop at approximately 4000 RPM during aggressive acceleration.
CAUSE
Ignition timing retardation shift due to unfavorable knock adaptations in the 4000 - 5000 RPM range.
CORRECTION
On a customer complaint basis, perform the procedure described below.
PROCEDURE
1. Verify the complaint. This situation can vary from a slight surge to a noticeable drop in power during hard acceleration.
2. Do not replace any parts!
3. Submit a PuMA case requesting authorization for DME shipment to Engineering Department for reprogramming. For the PuMA case title please use the following: "MS45.1 DME KNOCK ADAPTATION RESET".
4. Reinstall the DME.
5. For E60 only: Reprogram the vehicle using CIP 19.1 (Target Data Status E060-05-09-530), or higher.
WARRANTY
Covered under the terms of the BMW New Vehicle Limited Warranty.
For the appropriate labor operations please refer to the KSD system.
