ECM - EPROM Programming Update/Very Rough Idle: Overview

Group: 12
Engine Electrical

Bulletin Number
12 O6 95 (4258)

Woodcliff Lake, NJ
December 1995
Product Engineering

This Service Information bulletin supersedes S.I. 12 06 95 (4258) dated September 1995. Please remove the old bulletin from your S.I. binder and discard.

Asterisks identifies changes made to this revision.

YOU SHOULD PERFORM THE PROCEDURE OUTLINED IN THIS SERVICE INFORMATION BULLETIN WHENEVER AN AFFECTED VEHICLE IS IN THE SHOP FOR MAINTENANCE OR REPAIR.

SUBJECT:
DME EPROM Programming Update

MODELS:
E34 - M6O engines with manual transmissions produced 3/95 through 4/95

*Situation:

There have been isolated reports of premature engine wear in some of our M60 V8 engines due to a chemical reaction caused by fuels with a high sulfur content. This condition typically leads to a customer complaint of EXCESSIVELY rough idle.

To inhibit the chemical reaction, BMW has already installed a higher temperature coolant thermostat with an increase in activation temperature from 85°C to 95°C, as of 3/95 production. BMW will also install a modified engine control module (DME) program into all M60 vehicles equipped with a manual transmission up to 5/95 production.

Note:
These modifications have been installed into all M60 vehicles with a manual transmission as of 5/95 production.

A certain fluctuation in idle speed is normal and an inherent design characteristic of the M60 engine, as this engine is designed for maximum power output and optimal throttle response while still providing smooth running characteristics.*

Affected Vehicles:

In order to determine if a specific vehicle is affected by this Service Action, it will be necessary to utilize the "Service Menu" of the DCS (Dealer Communications System). Based on the response of the system, either proceed with the required corrective action or take no further action.

The Chassis Number Ranges listed below are only for informational purposes and are not to be considered as the only deciding factor.

Model Chassis Number Ranges

E34 53Oi GE55300 - GE55424
540i GA64610 - GA64889

*Warranty Information:

Parts and labor will be reimbursable under the terms of the applicable BMW New Car Limited Warranty of 6 years/100,000 miles.*

Defect Code: 00 11 01 74 00

Affected Vehicles in Dealer Inventory:

Work Package # 1: E34 - Replace engine control module (DME) EPROM.

Models: 530i and 540i

Labor Operation: 00 51 722
Labor Allowance: 9 FRU (E34)

Parts Allowance: DME EPROM
M60-E34
(With EWS II) 12 14 1 429 145

Orange DME
Service Action label 01 00 1 469 136

Affected Vehicles in Service (retail and demo):

Work Package # 2: E34 - Replace engine control module (DME) EPROM,
change engine oil and filter.

Models: 530i & 540i

Labor Operation: 00 51 723

Labor Allowance: 11 FRU (E34)

Parts Allowance: DME EPROM
M60-E34
(With EWS II) 12 14 1 429 145

Orange DME engine
Service Action label 01 00 1 469 136
Oil filter 11 42 1 731 634
Sublet Allowance: $20.00 (maximum limit
8 qts. engine oil)