FITMENT

Compatible with Volkswagen Group diesel vehicles equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include:

• Audi A4 B8 / B8.5 (3.0 TDI diesel SCR variants)
• Audi A5 / S5 (8T / 8F / 8TA diesel SCR variants)
• Audi A6 / A7 (some 3.0 TDI SCR configurations depending on engine code)
• Audi Q5 (8R diesel SCR variants in some setups)
• VW / Audi shared 3.0 TDI V6 SCR platform systems (Euro 5 / Euro 6)

OEM / CROSS REFERENCES

• 8K0907807L
• 8K0907807Q
• 8K0907807G
• SNS484
• 5WK96682 / 5WK96782A (common equivalent sensor family depending on revision)

⚠️ These part numbers are revision variants of the same NOx sensor family, but final compatibility depends on ECU calibration and engine code.

FUNCTION

This NOx sensor monitors nitrogen oxide levels in the exhaust system and sends data to the ECU to control AdBlue dosing in the SCR system, ensuring Euro 5/Euro 6 emissions compliance.

FAQ

Q1: What does this NOx sensor do?
It measures NOx (nitrogen oxide) emissions in the exhaust and helps control AdBlue injection.

Q2: Where is it installed?
On the SCR exhaust system (before/after catalyst depending on layout).

Q3: Symptoms of failure?

• Check engine light
• SCR / AdBlue warning
• Limp mode
• NOx sensor fault codes (P2200 series common)

Q4: Are 8K0907807L / Q / G interchangeable?
They are revision upgrades within the same platform, but must match ECU software version and vehicle VIN for correct fitment.