Upstream Left Air-Fuel Ratio Sensor Kit (27042) by NTK®. Make your vehicle faster and more powerful with premium-quality performance fuel system parts stocked on our website. Manufactured using the highest grade materials and the latest technology, they deliver the ultimate in performance and dependability. They will help increase the fuel flow and ensure you have the fuel pressure you need to get the most out of your vehicle. The fuel system parts we showcase are highly resistant to wear and tear and will surely serve you for years to come.

Today, everyone agrees that we have to care about our environment and reduce the amount of pollution produced by vehicles. To encourage reduced emissions, the government has introduced tougher exhaust gas emission legislation. As a result, today modern vehicles are equipped with oxygen sensors that control the fuel and ignition systems to optimize vehicle performance in the areas of fuel economy and emissions. Generally, a vehicle is equipped with two oxygen sensors located before and after the catalytic converter. They check the amount of oxygen in the exhaust and send signals to the vehicle's on-board computer that regulates the air/fuel mixture and monitors catalytic converter function to ensure proper engine performance, optimum mileage, and low emission of air pollutants from the vehicle.

• Connector Type: Specific
• Heated: Yes
• Thread Diameter: 18mm
• Wires: 5
• Wire Length: 241mm/9.5"