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Old 11-29-2011, 01:58 PM
edjack edjack is offline
Officially Welcomed to the 'Fest
Location: San Jose, CA
Join Date: May 2007
Posts: 13,359
Mein Auto: '97 540i 6 speed
If both post-cat O2 sensors have been replaced, it's the cat. Replace both, as the other one will fail soon, too. Magnaflow does not offer a cat for your car. Unless you can find a universal fit cat, you'll be at the mercy of the dealer.

Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

Last edited by edjack; 11-29-2011 at 02:00 PM.
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