FITMENT:
Compatible with Volvo Trucks FH/FM series trucks equipped with SCR emission systems.
Compatible with Mack Trucks MP7/MP8 engine platforms using SCR exhaust aftertreatment systems.

OEM reference numbers: 22303390, 21636091.
Used in diesel exhaust aftertreatment system for NOx monitoring (AdBlue/DEF SCR system).
Installed in exhaust system (inlet position before SCR catalyst).
Fitment must be confirmed by OEM part number and emission system configuration before installation.

FAQ:

Q1: How do I confirm compatibility?
A1: Match OEM numbers 22303390 or 21636091 with your original sensor and verify connector type, wiring length, and SCR system layout.

Q2: Where is this NOx sensor installed?
A2: It is installed in the inlet position of the SCR exhaust aftertreatment system on Volvo FH/FM and Mack MP7/MP8 engines, before the catalytic converter.

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

Q4: Is this compatible with both Volvo and Mack?
A4: Yes, it is used across compatible SCR-equipped Volvo and Mack diesel platforms depending on configuration.

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