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

• 4L0906261B
• 0281007020
• 0281007021
• Bosch PM sensor family 0 281 007 020 / 0 281 007 021

Typical applications include:

• Audi Q7 3.0 TDI (4L platform and select early 4M diesel configurations)
• Volkswagen Touareg 3.0 TDI (7P platform)
• VW Group V6 diesel engines with DPF soot monitoring system

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

• verify DPF regeneration efficiency
• detect soot slip or filter degradation
• optimize regeneration strategy
• maintain Euro 6 emissions compliance

⚠️ Important
This is a DPF particulate matter (PM) sensor, not a NOx or pressure sensor. It directly measures soot concentration downstream of the diesel particulate filter and is essential for VW Group 3.0 TDI emission control and regeneration logic.

Fitment must always be confirmed strictly by OEM number (4L0906261B), as VW/Audi use multiple revisions across similar V6 diesel platforms depending on model year and ECU calibration.