[F32Fleet]

Originally Posted by ENINTY

Based on what you said were your tools you have available to you and not a lot of wrenching experience (my assumption), take the car to an independent BMW mechanic and have them replace the O2 sensors. O2 sensors are a royal pain in the ass to remove because they get frozen in place in the exhaust. The tremendous heating and cooling cycles plus the exhaust gas particulates really lock the threads up. At a minimum you'll need a special O2 sensor removal socket, a strong 1/2 breaker bar, extensions, lots of penetrating oil, and usually a piece of pipe to extend the torque you apply to the breaker bar. Also, the space you will be working in is very tight and doesn't allow use of normal tools. A good mechanic will have the proper special tools to remove the sensors safely and quickly; it will be well worth your time to pay him to do it.

+1

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