Compatible with VW Group diesel emission aftertreatment systems using OEM references:

• 4K0906261C
• 4K0 906 261 C
• 0281008374
• 0281008375

Typical applications include:

• Audi A6 C8 (4K) 2.0 TDI Mild Hybrid
• Audi A6 Avant / Allroad C8 diesel variants
• Audi A7 Sportback (4KA) 2.0 TDI Mild Hybrid
• VW Group EA288 EVO / DTPA diesel platforms (regional calibration dependent)

Function:
Installed after the diesel particulate filter (DPF), this sensor continuously measures soot concentration in the exhaust stream. The ECU uses this signal to:

• verify DPF regeneration efficiency
• detect soot slip or abnormal emissions
• optimize regeneration strategy
• maintain Euro 6d real-world emissions compliance

⚠️ Important
This is a PM2.1 particulate matter sensor, not a NOx or pressure sensor. It directly measures soot concentration downstream of the DPF and is critical for modern VW/Audi diesel emission control systems.

Fitment must always be confirmed strictly by OEM number (4K0906261C), as VW Group uses multiple revisions (A/B/C/D) across similar C8 platform vehicles depending on ECU calibration and emissions package.