11 78 510 Replacing oxygen sensor (M62 / S62)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 BMW 540i, 2002 BMW 540i, 2001 BMW 540i, 2000 BMW 540i, and 1999 BMW 540i. However, it is still accessible from the selected car via links, so may be relevant.
(See 13 00 002 CHECKING FUNCTION OF DIGITAL ENGINE ELECTRONICS (DME) )
Disconnect connector for oxygen sensor.
Unclip Lambda oxygen sensor cable from bracket.
NOTE:
Use special tool 11 7 020 or special tool 11 7 030 to unfasten and tighten down the oxygen sensor.
Tightening torque, refer to 11 78 1AZ in ENGINE - TIGHTENING TORQUES - 540i .
Installation
The threads of new oxygen sensors are already coated with Never Seez Compound.
If an oxygen sensor is used again, apply a thin and event coat of Never Seez Compound to the thread only.
Do not clean the oxygen sensor section jutting into the exhaust line and do not bring it into contact with lubricant.
Protect (mask) oxygen sensor when applying underseal.
Note cable routing of oxygen sensor.