Average replacement cost of oxygen sensors . Replacing an oxygen (O2) sensor costs between $200 and $500 on average. The O2 sensor itself can cost anywhere from $20 to $300. Profe ...

A heavy-duty mechanic works through the tricky process of troubleshooting and replacing an oxygen sensor on a commercial ...

Oxygen sensors play an important role in your car's engine, but they aren't like many other components, such as oil filters, for which automakers provide a strict service schedule. Instead, the real ...

Replace both the upstream ones at the same time so the reading will be consistent. You can keep the downstream one on there. The only difference between the two is the length of the wire. You can also ...