Fitment

Based on OE catalog cross-reference data, 04L907805S / 5WK97312A is used in Volkswagen Group EA288 diesel SCR (AdBlue) systems, mainly on compact SUV and MQB-era diesel platforms.

Common applications include:

• Škoda Yeti (5L) 2.0 TDI diesel (selected EA288 variants)
• Volkswagen Golf / Jetta / Passat (EA288 diesel configurations depending on engine code)
• SEAT / Škoda MQB diesel SCR platforms
• SCR (AdBlue) emission systems (Euro 6 EA288 architecture)

Fitment is strictly based on OE number matching: 04L907805S / 5WK97312A

OE cross-reference listings confirm this part is used across VW Group EA288 SCR systems with multiple equivalent supplier references (Continental / Vitesco family SNS312A).

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 supports AdBlue dosing control to reduce emissions and meet Euro 6 standards.

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

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

• 04L907805S
• 5WK97312A
• Continental / Vitesco reference: SNS312A
• Related equivalent OE family: 04L907807S (platform-dependent variants)

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 on Škoda Yeti 2.0 TDI and other Volkswagen Group EA288 diesel SCR applications depending on engine configuration.

Is this sensor vehicle-specific?

Yes. It is strictly matched by OE number. Even small suffix differences (S / DM / CB variants) may indicate different calibration or sensor position.

Can similar NOx sensors be used instead?

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