Fitment Level: OE Match / Platform Verified

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

• 4L0906261F
• 4L0 906 261 F
• 0281007020
• 0281007021
• Bosch PM sensor family 0 281 007 020 / 0 281 007 021

Typical applications include:

• Audi Q7 4L 3.0 TDI / 4.2 TDI diesel
• Volkswagen Touareg 7L / early 7P diesel variants
• Porsche Cayenne 92A / 958 3.0 TDI diesel (platform-shared system)
• EA896 / CNRB / CASA diesel engine families (Euro 5–Euro 6 transition systems)

This sensor is used in diesel particulate matter monitoring systems, where it measures soot concentration downstream of the diesel particulate filter (DPF). The ECU uses this signal to:

• verify DPF efficiency
• control regeneration cycles
• detect abnormal soot breakthrough or filter damage
• improve emissions accuracy over pressure-only models

⚠️ Important:
This is a DPF particulate matter (PM) sensor, not a NOx or pressure sensor.
It directly measures soot concentration after the DPF and is essential for emissions control and regeneration strategy in VAG large diesel SUV platforms.

Fitment must always be confirmed strictly by OEM number (4L0906261F), as Q7/Touareg/Cayenne diesel systems have multiple sensor revisions across model years and engine codes.