1997 BMW Z3 O2 sensor replacement

1997 BMW Z3
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Engine Performance problem
1997 BMW Z3 6 cyl Four Wheel Drive Manual

All tests indicate a bad H02S sensor. Is there anything else I can check before replacing this. Where do I look for this, the local Auto Zone said it would be close to engine in the exhaust system, I cannot see anything from above so I guess the next step is to get underneath and find it. Is there any thing else that I need to know before replacing this expensive part ( $130+) I am now checking the air filters and checking for exhaust leaks and I guess for good electrical connections.
Apr 2, 2010 at 12:03 PM
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DOCHAGERTY
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Realoem.com has some great exploded views. I use them all the time. At 100k the sensors require replacement.
Apr 2, 2010 at 10:11 PM