Fitment
Compatible with Volkswagen Group Euro 6 diesel emission systems (SCR / AdBlue)

Vehicle applications include:
Volkswagen Caddy
Other VW Group diesel vehicles using OEM part numbers 04L907805AS / SNS471B / SNS472 / 5WK96743

FAQ

Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide levels in diesel exhaust and sends data to the SCR system to control AdBlue (DEF) injection and reduce emissions.

Q2: Are SNS471B and SNS472 the same?
A2: They are closely related Continental/Vitesco variants used within the same sensor family, but calibration differences mean exact matching is still required.

Q3: Where is this sensor installed?
A3: It is installed in the exhaust aftertreatment system, typically upstream or downstream of the SCR catalyst depending on vehicle configuration.

Q4: Is this only for VW Caddy?
A4: It is most commonly used on VW Caddy 2.0 TDI (2015–2020), but also appears in other VW Group SCR diesel platforms.

Q5: What are common failure symptoms?
A5: Engine warning light, AdBlue/SCR system faults, NOx signal errors, or reduced engine performance mode.