The BMW M3 was developed from the technology employed in the formula racing cars of late 1970's. This heritage is reflected in its handling, power and performance, truly making it the "Ultimate Driving Machine." Like every precision machine, the BMW M3 operates best within certain ranges. Staying within these ranges requires that maintenance is performed as scheduled.

The BMW M3 oxygen sensor is an important key to engine performance and efficiency. A certain ratio of fuel to air - known as the "mixture" - keeps the engine to running at peak performance while minimizing exhaust emissions.

A leaner mixture, i.e. a higher ratio of air to fuel, lowers emissions. The BMW M3 oxygen sensor detects the amount of oxygen in the exhaust gases, then delivers an electronic signal to the fuel-injection system, which automatically adjusts the mixture accordingly. The BMW M3 oxygen sensor requires vehicle running temperature to operate, so signals are not sent to the fuel injectors until the engine reached this point. If the oxygen sensor is defective or damaged, lower engine performance, increase fuel consumption, polluting exhaust result. These three symptoms indicate its time to replace your old unit with a new factory authorized BMW M3 oxygen sensor from our online catalog. You'll find low discount prices on a complete selection of authentic BMW M3 parts. The oxygen sensor not difficult to replace, nor is it expensive. Nonetheless, failure to replace a defective oxygen sensor with a genuine BMW replacement will be more expensive in the long run. Install a new BMW M3 oxygen sensor today, and you'll save on fuel and money.Get it from us, and you'll save even more.