NHTSA ID Number: 10148021
Manufacturer Communication Number: 122414
TSB/Document Date: 2018-11-13
Summary
N63: Proper Ignition Harness Installation and Ground Connections. INFORMATION https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/16511.1.B12241... 10/14/2014 Page 2 of 2 Any consecutive damage to the BSD interface components (DME, alternator voltage regulator, QLT sensor) caused by incorrect reinstallation of the ignition harness is not covered under the BMW
New Vehicle /SAV Limited Warranty.
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TSB/Document ID: 122414
Replacement Service Bulletin Number:
MFR Communication Date: 2014-09-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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Page 1 of 2
SI B12 24 14
Engine Electrical Systems
September 2014
Technical Service
This Service Information bulletin replaces SI B12 18 12 dated November 2012.
SUBJECT
N63: Proper Ignition Harness Installation and Ground Connections
MODEL
All with the N63 engine
SITUATION
The BSD (Bit Serial Data) interface communication fault(s) are set shortly after repairs, which required removal of
the ignition harness from the cylinder head cover. Depending on the type of a fault, when the BSD communication
is disrupted and the oil level sensor (QLT) data is no longer received by the DME, possible symptoms will
include:
Reduced CBS oil service forecast
Not possible to reset the CBS oil service
Oil level measurement not possible
Diagnosis of the fault leads to isolating the damaged component on the BSD circuit (DME, alternator voltage
regulator, QLT sensor).
CAUSE
Any of the BSD interface components could be damaged immediately upon engine start if the ignition ground
circuit, integrated into the metal bushing of the ignition coil harness duct on both cylinder banks, is not secured to
the engine cover with the correct bolt and to the specified torque.
This crucial ground point location is indicated with the red arrow in the picture below.
Red arrow:
M6x14 Allen bolt with washer
Torque 10 Nm
Replacement part: 07 11 9 904 071
(Torx head)
Yellow arrows:
M6x20 Hex bolt with washer
Torque 10 Nm
Replacement part 07 11 9 904 527
It is absolutely essential that during any engine repairs which require loosening or removing of the engine
harness, special attention be paid during reassembly to ensure the ignition coil harness bolts are the correct
part and are tightened to the specified torque before attempting to start the engine.
WARRANTY INFORMATION
https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/16511.1.B12241... 10/14/2014
Page 2 of 2
Any consecutive damage to the BSD interface components (DME, alternator voltage regulator, QLT sensor)
caused by incorrect reinstallation of the ignition harness is not covered under the BMW
New Vehicle /SAV
Limited Warranty.
[ Copyright ©2014 BMW of North America, Inc. ]
https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/16511.1.B12241... 10/14/2014
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