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Old 06-13-2012, 04:44 PM
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Flotsam Flotsam is offline
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Location: Maryland
Join Date: May 2012
Posts: 136
Mein Auto: 1995 BMW 325i
The actual sensor for an oxygen sensor is inside the opening "gills" of the sensor. I have read that it really doesn't make sense to try and clean them and in fact there is usually a big disclaimer about getting any of that dielectric grease on the oxygen sensor body. So i would never spray them with anything! Heated sensors are only supposed to last 60,000 miles and unheated ones for 30,000 miles so you might be better off just replacing them . BTW the generic Bosch ones work just as well as the BMW specific ones although you may have to splice in your own connector off your old one.

I would just replace it if it is suspect.

Last edited by Flotsam; 06-13-2012 at 04:45 PM.
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