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

• 4L0906261E
• 4L0 906 261E
• 0281006648
• 0281006649
• Bosch PM sensor family 0 281 006 648 / 0 281 006 649

Typical applications include:

• Audi Q7 3.0 TDI (4L facelift diesel)
• Volkswagen Touareg 3.0 TDI (7P platform)
• Porsche Cayenne 3.0 diesel (958 platform)
• VW Group V6 diesel engines with DPF soot monitoring system

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 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 V6 diesel emission control and regeneration logic.

Fitment must always be confirmed strictly by OEM number (4L0906261E), as VW/Audi/Porsche use closely related revisions across model years and ECU calibration variants.