I am the owner of a 2006 Mazda 3i touring, with around 94,000 miles on it. My engine light recently came on and I was told by the Mazda dealership (yes, I still take my car to the dealership for maintenance…although I am now rethinking this) that my oxygen sensor needs to be replaced and that it would cost me around $465, which includes labor, I believe.
I took it to another mechanic for a second opinion and now he is telling me that it is best to replace all of them when one goes out, since they run off of each other. He is quoting me $242.03 for just the one sensor, plus whatever his labor cost is, and is insisting that I have all three replaced (which would cost around $1,000).
I am at a loss. I don’t know who to believe. I know either way it is going to cost me, but I just don’t know which route to take. Any help would be greatly appreciated!