NGK Audi TT 2001-2000 Direct Fit Oxygen Sensor

When you're working on your Audi or Volkswagen, and the check engine light comes on, a faulty oxygen sensor is often the culprit. This NGK oxygen sensor, part number 25604, is designed to replace the original on a wide range of vehicles, including models like the Volkswagen Beetle, Golf, and Jetta, as well as the Audi TT. It's a crucial part of your vehicle's diagnostic system, helping to control the air-fuel ratio for better engine performance, improved fuel efficiency, and reduced emissions. It also alerts the onboard diagnostic system to potential issues with fuel delivery or the catalytic converter.

NGK, a major supplier of OEM oxygen sensors, builds this sensor with an advanced ceramic element. This element features a three-stage contaminant-resistant plasma jet and a deposit trap overcoat. This design helps protect the sensor from poisoning by contaminants, which can lead to premature failure. Because NGK is a ceramics company at its core, they have a lot of control over the quality of the ceramic element, from the raw materials all the way to the finished product.