Quote:
Originally Posted by niets123
The sensors you mention have never been replaced. The engine does not smell of petrol, and it actually runs quite well, but the sound is a bit harsh. Service is taken every year according to the book. But the exhaust pipe is very dirty.
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I personally would replace the maf sensor first as it is an easy diy job and also clean up the tailpipe so you can more easily see if it is still running rich.
The pre cat O2 sensor is usually due for changing at 100k miles / 160k Km.
I buy my parts from Germany -
www.buycarparts.co.uk (autodoc) as they have a good selection of parts for all vehicles.
They also stock the O2 sensor and the 22mm removal socket. It's easy to get to - just in front of the oil filter.
(It's rare for either sensor to produce fault codes unless they are way out of spec, so don't wait for this to happen)