FITMENT
Compatible with General Motors Company diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems requiring NOx monitoring.
Common applications include GM diesel passenger cars and light commercial vehicles using reference 55496923.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide levels in exhaust gases and sends real-time data to the ECU to control AdBlue/DEF dosing and emissions performance.

Q2: Where is it installed?
A2: It is installed in the exhaust system, typically upstream or downstream of the SCR catalyst depending on vehicle configuration.

Q3: What are symptoms of failure?
A3: Engine warning light, SCR system fault codes, increased emissions, and possible reduced engine performance or limp mode.

Q4: Is it compatible with all GM diesel models?
A4: No, compatibility depends on engine type, emissions standard, and SCR system setup.