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

Based on VAG OEM catalog data (VW/Audi/Seat/Skoda group) and verified aftermarket EPC listings, part number 04L907805ES (SNS754A) is used in VW Group Euro 6 diesel SCR (AdBlue) systems, mainly on 2.0 TDI EA288 engines (MQB platform vehicles and MAN TGE applications).

Confirmed applications include:

• Volkswagen Passat B8 2.0 TDI Euro 6 SCR
• Volkswagen Tiguan 2.0 TDI Euro 6 SCR
• Volkswagen Golf VII / VIII 2.0 TDI SCR variants
• Audi A3 / A4 / Q3 2.0 TDI SCR (EA288 family)
• Skoda Octavia / Superb 2.0 TDI SCR
• Seat Leon / Ateca 2.0 TDI SCR
• MAN TGE 2.0 TDI Euro 6 SCR (same VAG engine architecture)

Fitment is strictly based on OE number matching:
04L907805ES / SNS754A / A2C14322700-01

Verified Cross-Reference (Important)

• Aftermarket EPC listings confirm 04L907805ES = SNS754A NOx sensor for VW Group EA288 SCR diesel systems (ebay.com)
• Same sensor is listed across multiple VW Group brands (VW / Audi / Seat / Skoda / MAN) due to shared EA288 SCR architecture (auto-doc.ie)
• OEM interchange references confirm multiple superseded VW part numbers under the same SCR NOx sensor family (ebay.es)

📌 Key point:
This is a VW Group EA288 SCR NOx sensor, meaning it is ECU-coded and must match exact revision (ES / DR / CF variants are not interchangeable).

Technical Description

This NOx sensor measures nitrogen oxide (NOx) levels 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 SNS754A module is commonly used for:

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

Symptoms / Fault Codes

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

OE / Part Numbers

• 04L907805ES
• SNS754A
• A2C14322700-01
• VW Group EA288 SCR NOx sensor family
• Superseded equivalents may include 04L907805CF / DR / AT (platform dependent)

FAQ

Is this sensor interchangeable with other VW NOx sensors?

No. Even within VW Group, NOx sensors are ECU-coded. ES / AP / CJ / DR suffixes are not interchangeable.

Why is it used in VW, Audi, Seat, Skoda, and MAN?

Because all share the same EA288 2.0 TDI SCR diesel engine platform, so emission components are shared across brands.

Can aftermarket versions be used?

Yes, but only if the exact SNS754A / A2C14322700-01 calibration matches, otherwise SCR faults or limp mode may occur.