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 4M0907807G / SNS711A / 5WK97309

FAQ

Q1: What is the function of this NOx sensor?

A1: It measures nitrogen oxide (NOx) levels in diesel exhaust and sends data to the SCR system to control AdBlue (DEF) injection and reduce emissions.

Q2: Are 4M0907807G, 5WK97309 and SNS711A the same part?

A2: Yes.

• 4M0907807G = OEM VW/Audi number
• 5WK97309 = Continental reference
• SNS711A = sensor family code
  They refer to the same NOx sensor design used in MLB EVO diesel systems.

Q3: Which engines use this sensor?

A3: It is commonly used on:

• 3.0 TDI V6 diesel
• 4.0 TDI V8 diesel
  VW Group MLB EVO platforms

Including Audi Q7, Q8 and VW Touareg.

Q4: Where is it installed?

A4: Installed in the exhaust aftertreatment system, typically as SCR inlet or outlet NOx sensor depending on configuration.

Q5: What are common failure symptoms?

A5:

• Engine warning light
• AdBlue / SCR system faults
• NOx signal errors
• Limp mode (reduced engine power)