NGK Audi A4 2006-2001 Direct Fit 5-Wire Wideband A/F Sensor

This NGK 5-wire wideband air-fuel ratio (A/F) sensor is what you get when you need precise engine management. It's designed to work with your vehicle's on-board diagnostic system to help keep your engine running at its best, improving fuel efficiency and reducing emissions. Unlike older style sensors that just tell the computer if the mix is rich or lean, this wideband sensor gives a detailed, linear output. This lets the computer make exact adjustments to the air-fuel mixture, keeping combustion as close to ideal as possible.

NGK is a major supplier of these critical sensors to car manufacturers, so they know how to build them right. This sensor features an advanced ceramic element with a special overcoat designed to resist contamination from exhaust gases. This helps prevent the sensor from being poisoned by contaminants, which can lead to premature failure. It's a well-built part that's made to last and perform consistently.

This sensor fits a range of vehicles, including many Audi A4, Volkswagen Jetta, and BMW 3 Series models. Always check the fitment guide to confirm it's the right part for your specific car.