I need a new passenger side front o2 sensor. Where is the cheapest and i mean cheapest for this. I didn't know that o2's were this expensive but some places like denso have them up to $100 for a single 02! Also do i need to replace the other front and the rear? they seem to be fine but the passenger is loose making all kinds of noise and the car is running like crap

 

autozone... around $50

 

Call Jason Cromer, i just bought two for my LT1 for $36 a piece. Here is his number. 1-850-243-8826
Brad

 

how do you know that your o2's are bad

 

Car runs bad, poor gas mileage, BUT the main thing is the o2 itself is making noise inside like its damaged and its causing a ringing noise through the exhaust. My mechanic said to get a new one. I had my injectors cleaned, new air filter, new fuel filter and top end cleaner and the car still runs like do-doo and has a nice lil miss at idle. My clutch is going which is causing the car to act crappy but it is separate from these symptoms. My spark plug wires look fine and are on good, but I bought new spark plugs hoping that with the new plugs and o2's, the car would be back to normal. Again do i need to replace any of the other o2's if 1 is bad? The car in question is a 2001 Trans Am

 

Out of curiousity, which top end engine cleaner did you use?

 

the dealer did it, not sure what kind, whatever they carry. Still never answers, but thanks to all that have replied so far.

 

The reason I asked was because there was some speculation that O2 sensors could be fried by using a top end cleaner like Seafoam, especially if the car has not been brought up to operating temp before the cleaner is applied. A couple of people on this board have reported this issue. If you took the car to a GM Dealer they probably used the GM Top Engine Cleaner stuff which I have heard is %99 the same as Seafoam. I would hope they brought the car up to operating temp. before cleaning.

IMHO I would just replace the one that is rattling for now. (Yes, I budget shop everything ), however keep in mind that both may be bad and only one of them is making a noise. I am not sure if you can 'test' an O2 sensor or not, a quick search on this forum though may yield more info on testing.