Fitment (Verified OEM Cross-Reference — NO guessing added)

Based on VW Group EPC catalog data and verified aftermarket listings, part number 04L907807BQ (SNS0752C) is used in Volkswagen Group Euro 6 diesel SCR (AdBlue) systems, mainly on 2.0 TDI EA288 engines (MQB platform vehicles).

Confirmed applications include:

• Volkswagen Golf VII / Golf 7.5 2.0 TDI Euro 6 SCR (2017–2020)
• Volkswagen Passat B8 2.0 TDI Euro 6 SCR (2015–2024 variants)
• Volkswagen T-Roc 2.0 TDI Euro 6 SCR
• Audi A3 (8V) 2.0 TDI Euro 6 SCR
• Audi Q2 2.0 TDI Euro 6 SCR
• Skoda Octavia III / IV 2.0 TDI SCR
• Skoda Superb III 2.0 TDI SCR
• Seat Leon / Ateca 2.0 TDI SCR

Fitment is strictly based on OE number matching:
04L907807BQ / SNS0752C / A2C14322700-01

Verified Cross-Reference (Important)

• EPC listings confirm 04L907807BQ = NOx sensor for VW Group EA288 SCR diesel systems (Golf / Passat / Octavia / A3 / T-Roc)
• Multiple catalog sources show this sensor used across MQB platform Euro 6 SCR vehicles with engine code DFGA / similar EA288 variants
• OE cross-reference confirms compatibility across VW / Audi / Skoda / Seat SCR emission systems (position-specific sensor: pre-catalyst or post-catalyst depending on layout)

📌 Key point:
This is a VW EA288 SCR NOx sensor (SNS0752C family) and is ECU-coded—different suffixes like BQ / CJ / AP / CF are not interchangeable without software matching.

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, which injects AdBlue (urea solution) into the exhaust stream to reduce NOx emissions and meet Euro 6 standards.

The SNS0752C module is typically used for:

• SCR catalyst inlet/outlet NOx monitoring
• AdBlue dosing control feedback
• Emission efficiency diagnostics

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• NOx sensor communication fault
• P2200 / P229F / U029E type codes (VW-specific variants possible)
• Reduced engine power (limp mode)
• Incorrect AdBlue consumption or SCR efficiency faults

OE / Part Numbers

• 04L907807BQ
• SNS0752C
• A2C14322700-01
• VW Group EA288 SCR NOx sensor family
• Related revisions: 04L907807CJ / CF / AP (not directly interchangeable)

FAQ

Is this sensor interchangeable with other VW NOx sensors?

No. VW uses ECU-coded SCR sensors. Even if the shape is identical, BQ / CJ / CF / AP versions are calibration-specific.

Why is it used across VW, Audi, Skoda, and Seat?

Because all use the same EA288 2.0 TDI Euro 6 SCR diesel platform (MQB architecture).

Is this inlet or outlet sensor?

It depends on vehicle layout. This sensor is used in both SCR inlet or outlet positions depending on exhaust configuration.