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Mercedes-Benz · Exhaust & Emissions

DPF differential pressure sensor

The sensor measuring the pressure difference across the particulate filter, which is how the car knows how full it is.

Also called DPF pressure sensor, differential pressure sensor.

How you know it is this

  • A DPF warning with a filter that is not actually blocked
  • Regenerations happening far too often, or never at all
  • A pressure sensor fault code

Worth knowing before you buy

  • Cheap, and it causes the symptoms of a blocked filter. Always ruled out before buying a DPF.
  • The small pipes running from the sensor to the exhaust block with soot. Clearing them sometimes fixes it with no part at all.
  • A sensor reading wrongly can stop regenerations entirely, which then genuinely blocks the filter — a cheap fault that creates an expensive one.

What we need to quote it. The engine code and the fault codes. The chassis number settles the generation, the body and usually the engine in seventeen characters — it is on your mulkiya. A photograph of the old part helps where there is more than one version.

EGR valve and coolerLambda sensorsCatalytic converterParticulate filterDifferential pressure sensorTemperature sensorsSCR catalyst
After-treatment — schematic, to show where the part sits. Arrangement is right; it is a diagram and not a fitment reference.

Rest of the after-treatment

All exhaust & emissions parts
Get in touch

DPF differential pressure sensor for your Mercedes-Benz?

Send the chassis number and a photograph of the old part. We come back with genuine, OEM and aftermarket options priced side by side, with lead times.

Mon–Sat, 8:00 AM – 6:00 PM · +971 54 303 3119 (Operations Director) · +971 54 241 0599 (Managing Director)