Fitment

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

Vehicle applications include:
Audi Q7
Audi Q8
Volkswagen Touareg
Bentley Bentayga
Other VW Group MLB EVO diesel platforms using OEM 4M0907807 series sensors

FAQ

Q1: What is this NOx sensor used for?

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 all these part numbers interchangeable?

A2: These are revision variants of the same sensor family, including:
4M0907807P / F / AE / AP / AJ / D
They are commonly cross-referenced in VW Group SCR systems, but final compatibility depends on engine code and software calibration.

Q3: Where is this sensor installed?

A3: It is installed in the exhaust aftertreatment system, typically in:

• SCR inlet (upstream NOx sensor)
• SCR outlet (downstream NOx sensor)

Q4: Which vehicles commonly use this sensor family?

A4: It is widely used on VW Group 3.0 TDI and 4.0 TDI engines in:

• Audi Q7 / Q8
• VW Touareg
• Bentley Bentayga

Q5: What are common failure symptoms?

A5:

• Check engine light
• AdBlue / SCR system warnings
• NOx sensor signal fault
• Limp mode (reduced power)