Procedure

^ Read and print out the DME fault codes.


^ Troubleshoot and repair DME fault codes other than fault code 70 using the DIS

tester instructions as necessary. (Note: Other DME fault code repairs are covered under the terms of the BMW Emissions and New Car Limited Warranties.)

^ Check the oxygen sensor harness for hold down clips or any signs (crimped or

pinched areas in the sheathing) where a clip or other hold down device may have been installed in the past.





The illustration below shows possible areas where the harness may be fastened with clips: (1) clip on exhaust heat shield, (2) bracket on transmission.

^ Remove all clips from the exhaust heat shield, transmission bracket and any other oxygen sensor wiring harness hold down devices (wire ties, etc.).





^ If installed, bend the transmission bracket (1) using a pair of pliers up over the bolt head as shown in the illustration.

Warning:
Do not remove and install the bolt from the transmission housing to remove the bracket since this will lead to transmission oil leaks.

The oxygen sensor must only be replaced if:

^ the oxygen sensor harness had any type of fastener (clip, bracket, wire tie, etc.) holding it in place, or

^ the oxygen sensor harness sheathing shows any signs (crushed or crimped areas) where it may have been held down / fastened in the past, or

^ fault code 70, (oxygen sensor disconnected) is stored in the DME.





Install the new oxygen sensor (1) if necessary, routing the wiring harness as shown in the illustration. The harness should not contact any other components when routed correctly.

Do not use any hold down clips, wire ties, etc. to fasten the harness.