I already checked the archives and could not find any information on actual replacement tips of an O2 sensor for a 91 535i. Currently I have the sensor off and ready to replace, however I cannot get a wrench on the nut that holds the sensor into the exhast.. with it still on the car. Is there anyway to do this without dropping he exhaust? Also, I just have reg. box wrench's... will it work with different tools? Any suggestions?
If I have to drop the exhaust, any tips or tricks to getting it down and back on by yourself?
Thanks.... this is my wifes car and she is ready to drive it.. =)