130409

Page 1 of 3
SI B13 04 09
Fuel Systems
May 2013
Technical Service
This Service Information bulletin supersedes SI B13 04 09 dated March 2013.
designates changes to this revision
SUBJECT
N54 Engine: Diagnosis of Cold Start Rough Running with Misfire Faults
MODEL
F01
F02
E82
E88
E89
E90
E92
E93
E60
E61
E71
SITUATION
The customer may complain that during the cold start in the morning, the engine runs very roughly and the Service
Engine Soon lamp is illuminated.
Various misfire fault codes (e.g., 29CC, 29D2, 29D1, 29D0, 29C0, 29CF) may be stored in the DME control
module.
The engine rough running complaint can be reproduced on a cold start in the workshop. During the course of
diagnosis, the spark plugs, removed from the misfiring cylinders after the problem was reproduced, are found to
be soaked (“wet”) with fuel, while the injector tips are covered with a layer of carbon deposit.
CAUSE
Possible cause: high-pressure injector failure (leakage or incorrect spraying pattern) due to internal wear or
unfavorable stock of tolerances
IMPORTANT:
http://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/15410.11.B130409.... 6/7/2013
Page 2 of 3
For comprehensive N54 drivability diagnostics, always refer to the “N54 Engine Diagnostic Fault Tree” file (the
current version “02_14_13” is found as a PDF attachment to SI B12 55 06).
CORRECTION
In the case of reproducible “cold start” rough engine running with corresponding misfire faults, replace all three
high-pressure injectors on the bank that is faulted (1-3 or 4-6) using improved P/N 13 53 8 616 079 with index 11
or higher.
For example, if the engine has a misfire on cylinder 1, replace injectors for cylinders 1-3 if those injectors are not
already index 11 or higher.
If the injectors on that bank are already index 11 or higher, only replace the injector on the faulty cylinder.
Use P/N 13 53 8 616 079 when replacing the injector(s).
Follow Repair Instruction 13 53 310 for injector removal and installation. Additionally, the spark plugs from the
misfiring cylinders which were found to be soaked (“wet”) with fuel should be replaced.
After injector replacement, perform the individual injector calibration (adjustment) with the DME control module,
per SI B12 26 08.
See the photo below to properly identify the index number.
Additional Information:
As of January 2013, an improved
injector is available. Two distinct
markings on the injector itself will
identify the improved injector:
1 = Internal material improvement
2 = 7585261 – (index) 11 or greater
IMPORTANT: Injectors with index 11 and higher have a different calibration and construction than
injectors with index 10 and lower.
Due to this difference, the injectors with index 11 and higher and injectors with index 10 and lower cannot
be mixed on the same engine bank (i.e., cylinders 1-3 or 4-6).
Once a bank of injectors is at index 11 or higher, the “bank set replacement” requirement no longer
applies. For index 11 injector failures, only replace the failed injector.
Use the DCS Warranty Vehicle Inquiry: See the Repair History (Claims) section to review the prior
http://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/15410.11.B130409.... 6/7/2013
Page 3 of 3
injector repairs, if applicable. Click on the “Claim Number” to review each claimed defect code and its
corresponding line item details (labor, parts and sublet).
IMPORTANT NOTE:
For N54 misfire fault complaints during normal engine operation (misfire faults not related to the engine’s “cold
start”), refer to the following Service Information bulletins:

B12 05 09 - N54 (E6x) Misfire Faults Due to DME Software Error

B12 06 09 - N54 (E9x) Misfire Faults Due to DME Software Error
PARTS INFORMATION
Part Number
Description
Quantity
13 53 8 616
079
High-pressure injector (this part number is index 11
or greater)
As required, up to 6
WARRANTY INFORMATION
Not applicable.
[ Copyright ©2013 BMW of North America, Inc. ]
http://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/15410.11.B130409.... 6/7/2013