1990 740 GLE

I just wanted to relay 2 stories that have happened to me in the past few months. About 5 or six months ago my O2 sensor went bad. I bought a new one from Kragen auto and replaced it. The car still did not run right, tripped the check engine light, didn't pass smog, etc.

ready to pull my hair out, i took it to my local, very good, volvo mechanic and they did what i did, replaced the O2 sensor. car ran great, passed smog, etc.

I thought this might have been a fluke, but a similar thing happened again today. got error codes for ETC sensor a couple weeks ago, went out and bought a new sensor and replaced it but that did not fix the problem, in fact it only seemed to get worse. much hair pulling and many theories later i give up and take it again to my trusty volvo mechanic, who, you guessed it, replace the ECT sensor and the car runs great!!!!

so in 2 cases the part given to me from the parts guy at the counter has been wrong.

so, i just wanted to relay these stories and see if any one has had similar problems. i may be a complete idiot and can not install a sensor into a car, but i'd like to think i am bit better a mechanic than that...

also it seems to me that from now on i will have to double check which part those guys at the counter are giving me and not just assume that they are pulling the right parts.