FITMENT:
Compatible with Mercedes-Benz diesel vehicles equipped with SCR emission systems.
OEM reference numbers: A0009053403, A0009056900.
Used in diesel exhaust aftertreatment system for NOx monitoring (AdBlue/DEF system).
Installed in exhaust system (inlet or outlet position depending on engine configuration).
Fitment must be confirmed by OEM part number and emission system setup before installation.

FAQ:

Q1: How do I confirm compatibility?
A1: Match OEM numbers A0009053403 or A0009056900 with your original sensor and verify connector type, wiring length, and mounting position.

Q2: Where is this NOx sensor installed?
A2: It is installed in the SCR exhaust aftertreatment system of Mercedes-Benz diesel vehicles, before or after the catalytic converter depending on configuration.

Q3: What are common failure symptoms?
A3: Engine warning light, SCR/AdBlue system fault, incorrect NOx readings, or reduced engine performance.

Q4: Is this compatible with all Mercedes-Benz diesel models?
A4: No, compatibility depends on engine type and emission system configuration. OEM number must be matched exactly.

Q5: Does replacement require programming?
A5: Some vehicles require system reset or diagnostic adaptation after installation.