O2 sensors help gauge whether the engine is running with too much fuel or air. Here's how much you can expect to pay when it's time to replace them.

While O2 sensors have no fixed replacement schedule, your driving style and the health of other engine components can drastically affect its life span.

Don't let failing oxygen sensors compromise your engine's performance. O2 sensors are critical to emissions control on your car, SUV or truck. As the name implies, the O2 sensor (also called an ...

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 ...

When we got the invitation to tour Bosch's oxygen sensor plant in Anderson, South Carolina, it had all the allure of eating a sand sandwich. Let's face it, oxygen sensors aren't the most glamorous ...