Fitment Level: OE Match / Platform Verified

Compatible with Mercedes-Benz diesel emission aftertreatment systems using OEM references:

• 1277023621
• 0281008069
• 0281008070 / 0281008071 (related revision family depending on engine calibration)
• A0009050608 / A0009059601 (closely related Mercedes PM sensor ecosystem on some variants)

Typical applications include:

• Mercedes-Benz C-Class W205 (diesel Euro 6 facelift models)
• Mercedes-Benz E-Class W213 / S213 diesel
• Mercedes-Benz GLC X253 / C253 diesel
• Mercedes-Benz Sprinter W907 / W910 diesel
• Engines: OM654 / late OM651 diesel platforms (Euro 6 / Euro 6d 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:

• monitor DPF efficiency in real time
• control regeneration cycles more precisely than pressure-based estimation
• detect soot breakthrough or filter degradation
• maintain Euro 6 emissions compliance

⚠️ Important:
This is a DPF particulate matter (PM) sensor, not a NOx or temperature sensor.
It directly measures soot concentration after the DPF and is a critical feedback sensor in Mercedes-Benz BlueTEC emissions systems.

Fitment must always be confirmed strictly by OEM number (1277023621 / 0281008069), as Mercedes uses multiple revisions across OM654/OM651 platforms depending on model year and ECU software.