Volkswagen Audi NOx Sensor 5WK97213 4G0907807K OEM Standard

KLP-produced NOx sensor adheres to Volkswagen and Audi OEM standards; OEM numbers 5WK97213 and 4G0907807K; original-location replacement design, no wiring changes necessary. Monitors NOx in exhaust in real time and transmits signals to ECU to optimize SCR injection and maintain emissions compliance while ensuring steady engine power output. Fits Touareg, Audi Q7 and A8L with 3.0T or 4.0T diesel engines. Function: monitor NOx, provide feedback to ECU to optimize SCR injection and maintain emissions compliance and engine power.