Fitment

Based on OE catalog cross-reference data, 04L907805AE is used in Volkswagen Group EA288 diesel SCR (AdBlue) systems on MQB platform vehicles.

Common applications include:

• Audi A3 (8V) 2.0 TDI diesel
• Volkswagen Golf VII (5G) 2.0 TDI
• Volkswagen Jetta / Golf Sportsvan (EA288 diesel variants)
• Škoda Octavia III (5E) 2.0 TDI
• SEAT Leon III 2.0 TDI
• SCR (AdBlue) Euro 6 diesel emission systems

Fitment is strictly based on OE number matching: 04L907805AE

OE catalog cross-reference data confirms this sensor belongs to the EA288 NOx sensor family, often listed alongside SNS316 / 5WK97253 equivalents.

Technical Description

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

It is part of the SCR (Selective Catalytic Reduction) system and controls AdBlue dosing strategy to reduce emissions and maintain Euro 6 compliance.

The sensor is an integrated electronic module designed for continuous high-temperature exhaust monitoring in modern diesel engines.

Symptoms / Fault Codes

Common symptoms of failure may include:

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

OE / Part Numbers

• 04L907805AE
• Continental / Vitesco reference family: SNS316B / 5WK97253
• Related OE family variants: 04L907805AS / 04L907805AK (platform-dependent revisions)

FAQ

What does this NOx sensor do?

It measures nitrogen oxide levels in diesel exhaust and sends data to the ECU for SCR emission control.

Which vehicles use this part?

It is commonly used across VW Group EA288 diesel platforms such as Golf 7, A3 8V, Octavia 3, and Leon 3 depending on engine configuration.

Is this sensor vehicle-specific?

Yes. It is strictly matched by OE number. Even small suffix differences (AE / AL / BG variants) can indicate different ECU calibration or mounting position.

Can similar NOx sensors be used instead?

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