Fitment (Market-Validated Usage)

Based on OEM catalog + aftermarket cross-reference listings (EU distributors and multi-brand OE databases), this NOx sensor is used in Volkswagen Group EA288 diesel SCR (AdBlue) systems on MQB platform vehicles.

Common system applications include:

• Volkswagen Golf VII 2.0 TDI (EA288 diesel)
• Volkswagen Passat B8 2.0 TDI (EA288 diesel)
• Volkswagen Tiguan 2.0 TDI (EA288 diesel)
• Škoda Octavia III / Superb III 2.0 TDI
• SEAT Leon / Ateca 2.0 TDI
• SCR (AdBlue) Euro 6 diesel emission systems

Fitment is strictly based on OE number matching: 04L907807AS

Cross-reference data confirms this OE is shared across VW Group brands within the EA288 SCR system architecture.

Technical Description

This NOx sensor measures nitrogen oxide concentration in diesel exhaust gases and sends real-time signals to the ECU.

It is part of the SCR (Selective Catalytic Reduction) system, which uses AdBlue (urea) injection to reduce NOx emissions and meet Euro 6 standards.

Designed for continuous high-temperature exhaust operation with integrated electronics and CAN communication to the engine control unit.

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• P2200 / P229F fault codes (system dependent)
• Reduced engine power (limp mode)
• Increased emissions

OE / Part Numbers

• 04L907807AS
• 04L 907 807 AS (format variant)
• Related EA288 NOx sensor family: 04L907805 / 04L907807 series

FAQ

Is this sensor vehicle-specific?

Yes. It must match the exact OE number. Even small suffix differences (AS / AP / DE variants) can change calibration or sensor position.

Why do multiple brands appear in fitment?

Because Volkswagen Group (VW / Audi / Skoda / SEAT) shares the same EA288 diesel SCR platform architecture.

Can this sensor be used on similar OE numbers?

Not recommended. NOx sensors are ECU-calibrated components and must match exact OE specification.