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

Vehicle applications include:
Audi A8
Audi S8
Other VW Group 4H chassis diesel vehicles using OEM part number 4H0907807E / 5WK96795

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) dosing and reduce emissions.

Q2: Where is this sensor installed?
A2: It is installed in the exhaust aftertreatment system, typically upstream or downstream of the SCR catalyst depending on engine layout.

Q3: Is 4H0907807E the same as 5WK96795?
A3: Yes, 4H0907807E is the OEM Audi/VW number and 5WK96795 is the Continental aftermarket reference for the same sensor family.

Q4: Is this only used on V8 TDI models?
A4: It is most commonly used on Audi A8 D4 facelift diesel platforms (including 4.2 TDI variants with SCR systems).

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