Fitment (Market-Validated Usage)

Based on aftermarket listings and OEM cross-reference catalogs, this NOx sensor is used in Volkswagen Group diesel SCR (AdBlue) systems associated with 8R-platform NOx sensor family applications.

Marketplace-verified usage commonly shows this part listed for:

• Audi diesel SCR (AdBlue) applications
• Volkswagen Group shared diesel emission systems
• Porsche diesel SCR applications in aftermarket catalogs

Fitment is strictly based on OE number matching: 8R0907807E / 5WK96796

Multiple eBay and aftermarket listings explicitly reference compatibility with Audi Q5 and Porsche Macan diesel applications, indicating shared VAG SCR system usage for this OE family.

Technical Description

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

It is part of the SCR (Selective Catalytic Reduction) system, which works with AdBlue (urea solution) to reduce NOx emissions and maintain Euro emissions compliance.

The unit is an integrated electronic sensor designed for high-temperature exhaust environments with continuous monitoring capability.

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

• 8R0907807E
• 5WK96796
• Continental / VDO family NOx sensor reference: 5WK96796

FAQ

Is this sensor vehicle-specific?

Yes. NOx sensors must match the exact OE number. Even small suffix differences (E / N / Q variants) can indicate different calibration or hardware revisions.

Why are multiple brands mentioned in marketplace listings?

Because Volkswagen Group shares SCR diesel technology across Audi, Volkswagen, and Porsche platforms, leading to cross-brand OE usage in aftermarket catalogs.

Can similar OE numbers be used instead?

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