Catalytic converters gone bad
12-09-2008, 05:23 AM
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Catalytic converters gone bad
I have a 2001 A4 2.8L with 91,000 miles and need 2 catalytic converters to pass inspection. My mechanic told me it would be around $2,800. He recommended against after market converters, but they are half to a third the price of the Audi part. Any thoughts on this? I am in a quandary as to whether it is worth it at this point. It needs a timing belt and tune up as well. I do love driving the car...
12-09-2008, 05:34 AM
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$2,800 for a pair of converters? Seek more opinions/quotes.
Normally OEM is of first rate quality. However, you can easily
purchase an entirely new, high quality aftermarket exhaust for
less than what he quoted.
purchase an entirely new, high quality aftermarket exhaust for
less than what he quoted.
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12-09-2008, 06:00 AM
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I would scan with VAG-COM/VCDS for fault codes first
Is the problem really catalytic efficiency? Is it really both of them?
The catalytic converters don't go bad for no reason. There must be something else that is wrong that is damaging them (such as system too rich or post-cat O2 sensor bad), and if you just replace them, the new ones will get damaged too.
I would look for fault codes in the ECU and check measuring block 32 for trim values, and I would try to set readiness manually to see if the cats continue to fail. I had my own cats fail once because of how I handled the throttle as they were being tested, once I re-tested they passed.
The catalytic converters don't go bad for no reason. There must be something else that is wrong that is damaging them (such as system too rich or post-cat O2 sensor bad), and if you just replace them, the new ones will get damaged too.
I would look for fault codes in the ECU and check measuring block 32 for trim values, and I would try to set readiness manually to see if the cats continue to fail. I had my own cats fail once because of how I handled the throttle as they were being tested, once I re-tested they passed.