Hi
In my Max 97 AT I have code
P0150

This is an O2 sensor ....But only one or both of the 2 O2 sensors before the catalytic converter ?

I have P0150...and I want to buy it (or them) ...should I buy one or take 2 to replace at the same time ?

Is Bosch any good ? how much a reasonable price to pay a mechanic to replace them ?

Thanks

You should only replace what ever the code is telling you to replace
P0150---->03 03 Front Left Heated O2 sensor
If I remember correctly Bosch is the oem for the maxima just make you your not getting one of those universal once because they most likely not going to work

Just get a direct replacement. Some of the universal ones arn't heated. so....................it wont work.

I got both front sensors at the same time. I got the Bosch universal and spliced and replaced them in my driveway with an Oxygen sensor tool kit (loaner program) from AAP.

Bosch is good. I am not sure if the OEM is Bosch though

As said, you should only have to replace the one you get a code for.

However if they're both the OEM sensors, I would replace both upstreams. O2 sensors tend to get lazy at high mileage, and can drop your MPG.