The fuel/air mixture of an internal combustion engine ideally requires constant fine adjustment for various driving conditions. In the old days, this was accomplished by using a "choke" knob. The purpose of this control was to adjust the ratio of fuel to air by literally "choking" off the engine's air supply.

Pulling out the choke knob would result in a "richer" mixture for cold starts, winter driving and traveling under a heavy load. The Subaru Impreza Oxygen Sensor has taken over this function.

By "sensing" the amount of oxygen in the exhaust, the Subaru Impreza Oxygen Sensor is able to send an electronic signal to the fuel injectors, which then adjust the fuel/air mixture for the current driving conditions. The result is far more efficient use of precious fuel. In fact, the engine of your Subaru Impreza delivers three times the power and over twice the gas mileage of a similar sized engine of sixty years ago. When it comes to maintaining this performance, count on us for the best deals on the Subaru Impreza Oxygen Sensor and anything else you need. We will meet or beat any competitor's online price on any Subaru part or accessory - and when your order totals $50 or more, your shipping is free! We proudly stand behind each and every automotive part and accessory we sell. Every item in our inventory must pass our rigorous muster. If it doesn't pass yours as well, you may pack it up and send it back for a full refund of your purchase price - no questions asked.Order online through out secure, SSL-encrypted server, or give us a call, anytime of day or night, 24/7.