Denso 234-5135 Air Fuel Ratio Sensor

Denso 234-5135 is a 5-wire heated wideband air fuel ratio sensor designed for precise oxygen measurement in exhaust gas. It features a direct-fit OE connector and a wire length of 14.29 inches (36.3 cm). The sensor utilizes a zirconia sensing element with an integrated heater for rapid closed-loop operation. It is engineered to meet stringent emissions regulations and provide accurate fuel trim adjustments for optimal engine efficiency and catalyst protection. This unit serves as a direct replacement for upstream position sensors on select BMW, Mercedes-Benz, and Mini passenger car applications. Interchange references include Walker Products 250-25045, NTK 25045, and various aftermarket part numbers. Manufactured to OE specifications for fit, form, and function.