Campaign - Retrofit Engine Compartment Ground Cables
SI B12 10 07Engine Electrical Systems
July 2007
Technical Service
PERFORM THE PROCEDURE OUTLINED IN THIS SERVICE INFORMATION ON ALL AFFECTED VEHICLES THE NEXT TIME THEY ARE IN THE SHOP FOR MAINTENANCE OR REPAIRS.
SUBJECT
Service Action: N62TU - Retrofit Engine Compartment Ground Cables
MODEL
E60, E63, E64, E70 with N62TU produced 03/05-06/07
SITUATION
When driving in certain environmental conditions (ambient temperature below freezing and low air humidity), an electrostatic discharge in the engine compartment may cause electromagnetic interference with the engine wiring harness. Consequently, intermittent engine speed fluctuation and momentarily loss of power may be experienced.
To prevent such a condition, two additional ground cables between the fuel injection rails and ignition coils grounding points need to be installed on both engine banks.
AFFECTED VEHICLES
This Service Action involves 550i/550iA, 650i/650iA coupe/convertible, and X5 4.8iA vehicles with N62TU engines which were produced from 03/22/2005 up to 06/15/2007.
In order to determine if a specific vehicle is affected by this Service Action, it will be necessary to utilize the "Service Menu" of DCSnet (Dealer Communication System) or the Key Reader. Based on the response of the system, either proceed with the 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.
CORRECTION
1. On E70 vehicles, remove an air intake cleaner housing. Refer to RA13 71 000 for the removal instructions. Remove two ignition coil plastic covers by pulling them out; each cover is held by 2 rubber grommets.
2. On E60, E63, E64 vehicles, remove the engine acoustic top cover. Remove two ignition coil plastic covers by pulling them out; each cover is held by 2 rubber grommets.
Cylinder bank 1-4.
3. Remove M5 bolt (1) from the injection rail and install ground cable (P/N 12 52 7 581 845) with the crimp facing upwards.
4. Connect the other end of the ground cable to the grounding point of the ignition coils (2), located in front of the VVT motor. Crimp connector has to be pointing upwards.
5. Torque both fasteners to 5 Nm.
6. Position the ground cable (1) as shown on the illustration.
Cylinder bank 5-8.
3. Remove M5 bolt (1) from the injection rail and install ground cable (P/N 12 52 7 581 845) with the crimp facing upwards.
4. Connect the other end of the ground cable to the grounding point of the ignition coils (2), located behind the VVT motor. Crimp connector has to be pointing upwards.
5. Torque both fasteners to 5 Nm.
6. Reinstall all previously removed engine components.
PARTS INFORMATION
LABEL INSTRUCTIONS
This Service Action has been assigned code number 501. After the vehicle has been checked, and corrected if necessary, obtain a label (SD92-335) and:
a. emboss your BMW dealer warranty number in the middle of the label (1);
b. punch out code number 501 printed on the label and,
c. affix the label to the B pillar as shown.
If the vehicle already has a label from a previous Service Action/Recall Campaign, affix the new label next to the old one. Do not affix one label on top of another one because a number from an underlying label could appear in the punched-out hole of the new label.
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
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