The oxygen sensor on your Lexus is a part of the emissions control and is attached to the exhaust manifold of the engine. Its purpose is to measure the amount of air mixed in with the gasoline that is going into the vehicle’s engine. It sends that information to an onboard ECU (emissions control unit) computer that will then adjust the air and gasoline mixture to provide optimum fuel efficiency with minimum exhaust emissions.

If your Lexus ES300 Oxygen Censor should fail, you can damage your car’s catalytic converter and incur expensive repair bills. Unfortunately, your Lexus ES300 Oxygen Sensor has a downside in that it can offset many fuel saving modifications you may incorporate in your car.

If your engine is burning fuel too lean because of these modifications, the sensor detects that and instructs the engine to inject more gasoline into the mixture going into your car. That effectively wipes out any fuel savings the modification might have achieved. If your car is running roughly, hesitating when you accelerate to highway speeds, bumping and stalling out and suddenly begins burning much more gasoline than usual, you should check your Lexus ES300 Oxygen Sensor. It’s an easy job to remove and replace it. It will probably take anywhere from one to three days before you notice any improvement in your ride as the sensor adjusts to your vehicle. Any reasonably competent backyard mechanic, using basic tools, can replace an oxygen sensor in a short period of time. Our oxygen sensors are manufactured with the finest quality components available and are guaranteed to meet or exceed strict factory specifications using the finest materials available.They can be ordered from our secure online store and carry a full money back guarantee.