Keeps your various running the way it should — this DIESEL TECHNIC part restores the original function of a worn or failed Urea Injection Nox Sensor DIESEL TECHNIC OE Ref 1697586, built to OEM reference 051423 rather than a generic approximation.
DIESEL TECHNIC identifies it as 5.44013, EAN: 0405779562283. Match that against OEM 051423 or your old part before fitting, particularly if your vehicle's had any running changes across its production years.
Confirmed for selected various vehicles. Use the vehicle registration lookup tool if you're not certain, or browse Exhaust for other options.