Who diagnosed the original problem and told you to replace the air flow meter? Did you pay someone for that diagnosis or just to replace the part? Did they do an actual diagnosis or just retrieve codes?

Answered by Wrenchtech (expert)
14,742 answers provided

An actual diagnosis of the original problem (rough idle/running) was done by the shop that subsequently installed the meter. According to the invoice, what they did included:
1. check rough running and check/clear codes ($24.48)
2. check fuel pressure (OK) ($48.95)
3. check/clean/repair connections at the air mass meter, car runs bad ($24.48)
4. Replace AMM. Test drive and cars runs OK. ($48.95)
I was then told that the only two AMM's they had were priced at $375 and $250. I said I'd like to try to find one for less. They said they would install it (I've been a customer there for about 15 years and they do offer used parts when available). They recommended I buy a Bosch part and gave me the part# to look for. I was able to find a new reconditioned Bosch part in a factory sealed box for less so bought it and took it to the shop to be installed. This is the part that was in the car when I picked the car up and found it was still running rough. I checked with the guy I bought the part from to see if he has received any other complaints. He said he has sold 14 of the same units in the last few months and has not had any issues. He said he acquired the parts from an OEM warehouse which had closed. Thanks for your reply.

Response from itwerx2
1 question asked

If that was the sequence of events, then I would agree that they should be looking at it for no charge at this point and standing behind their original diagnosis. It would even be questionable that they would charge for a further repairs for the same symptom since their original diagnosis appears to have been wrong.

Answered by Wrenchtech (expert)
14,742 answers provided