BMW Service Bulletin 12 17 05

[A1Gio2]

Who has had his performed to fixed the 4K rpm power dip and will dealers still honor it?

I'm sure some will say it's out of warranty, but I perceive this as a defect that should be addressed as a recall.

[derbo]

It will probably cost you at least $200 to get the DME updated. I paid something similar back in 2010.


Here is the SIB information:

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.
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[BMWM3186]

I swear I don't have the dip... Dinan tune from previous owner fixed it maybe?

Sent from my ONEPLUS 3 using Tapatalk

[slater]

i don't have a 4K RPM dip, but i have the shark/conforti tune. i DO have a 2500-3000rpm stumble in higher gears.

[derbo]

Honestly,

I can't feel it cause the ZHP doesn't have that much power. It just feels like I have no power on the track compared to all these M3s, etc.

[slater]

Honestly,

I can't feel it cause the ZHP doesn't have that much power. It just feels like I have no power on the track compared to all these M3s, etc.

LOL.... :)

i felt it before i had the conforti tune.

[A1Gio2]

Mine is heavily pronounced from 4-5k RPM's, so much so that I have been driving under 3500 RPM's. I called the dealer and they are complete morons who had no idea what I was talking about and simply said if there's not a recall associated with the VIN# in the system, we can't look it up.

I am thinking about giving BMW NA a call for giggles as I still think this is a problem that I shouldn't have to pay for.

Worst case, an indy shop can do it.

[Wisco]

I noticed the 3750rpm dip when we first got our 2005 Vert, but it doesn't seem as noticeable now. Is this possible or have I just gotten used to it?

Need to Shark tune the car and see if anything feels different, besides the improved throttle responsiveness that most see with this tune.