Your car's computer uses data from the O2 sensors to determine the effectiveness of the catalytic converter and how much fuel to inject. So they're critical pieces. Luckily, replacing one is ...

Unscrewing a sensor and replacing it is pretty straightforward. You might need this special socket to clear the wires. Twelve years and more than 100,000 miles have passed under your trusty commuter ...

My 2007 Toyota RAV4 T180 D-4D is sitting in the Toyota garage whilst they scratch their heads trying to work out why all the warning lights come on saying there is a fuel leak - but they can't find ...