Mercedes Sprinter DPF Differential Pressure Sensor – Bosch | NCV3 3.0L OM642 & 2.1L OM651 BlueTec | #6429050200 (2010–2018)

A failed DPF differential pressure sensor on a NCV3 Sprinter blinds the ECU to the soot load building inside the diesel particulate filter — preventing the system from triggering active regeneration until the DPF is so clogged that it causes severe backpressure, power loss, and potential engine damage. This is the Bosch DPF differential pressure sensor for NCV3 Sprinters equipped with the 3.0L OM642 or 2.1L OM651 BlueTec diesel engine, a direct replacement that restores accurate DPF load monitoring and proper regeneration control.

What This Part Does

The DPF differential pressure sensor — also called a delta-P sensor or backpressure sensor — measures the pressure difference between the inlet and outlet of the diesel particulate filter. As soot accumulates inside the DPF's ceramic substrate channels, it restricts exhaust flow and creates a measurable pressure differential across the filter. The ECU monitors this differential and uses it to calculate the DPF's soot load in real time. When the load reaches the regeneration threshold, the ECU initiates an active regeneration cycle — raising exhaust temperature by post-injecting fuel to burn off accumulated soot and restore DPF flow capacity. When the sensor fails, produces an implausible reading, or its connecting pressure lines crack or become blocked, the ECU loses this critical input and cannot correctly manage regeneration — causing the DPF to load beyond its self-cleaning capacity.

Common Symptoms of a Failing DPF Differential Pressure Sensor

• DPF warning light or regeneration fault codes in the instrument cluster
• Check engine light with fault codes related to DPF pressure circuit or soot load plausibility
• DPF that loads rapidly without completing regeneration despite normal driving conditions
• Power loss from extreme DPF restriction — particularly under highway load
• Engine entering limp mode from excessive exhaust backpressure
• Oil dilution from repeated failed or partial regeneration attempts

When to Replace

Replace when the sensor is confirmed faulty by XENTRY or scan tool with active DPF pressure sensor fault codes. Also inspect and replace the two small rubber pressure sample lines that connect the sensor to the DPF inlet and outlet — these lines frequently crack with age and cause the same fault codes as a failed sensor. Replace lines and sensor together for a complete repair.

NCV3 BlueTec Specific — VIN Verification Required

This DPF differential pressure sensor is for NCV3 Sprinters with the 3.0L OM642 and 2.1L OM651 BlueTec diesel engines. It is not compatible with VS30 Sprinters or NCV3 Sprinters without the DPF/BlueTec system. Always verify by VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2010–2018 Mercedes-Benz Sprinter 2500 – 3.0L OM642 / 2.1L OM651 BlueTec (NCV3/W906)
• 2010–2018 Mercedes-Benz Sprinter 3500 – 3.0L OM642 / 2.1L OM651 BlueTec (NCV3/W906)
• 2010–2018 Freightliner Sprinter 2500 / 3500 – BlueTec models

✔ Always inspect and replace DPF pressure sample lines at the same time
✔ BlueTec/DPF-equipped models only

Part Numbers

• Mercedes OEM: 6429050200 / A6429050200 / 642-905-02-00
• Manufacturer: Bosch — 0 281 006 213
• SKU: 6429050200