Diesel Particulate Filter Differential Pressure Sensor – 03L906051D

The diesel particulate filter (DPF) differential pressure sensor (OEM 03L906051D) is a critical emissions control component that measures exhaust backpressure across the DPF and communicates this data to the engine control unit (ECU). By comparing pressure before and after the particulate filter, the sensor helps the vehicle determine when to initiate the DPF regeneration cycle that burns off soot and prevents excessive clogging. A malfunctioning differential pressure sensor can lead to incorrect regeneration timing, increased soot buildup, and diesel particulate filter failure, affecting engine performance and emissions compliance.

OEM Number: 03L906051D, 03L906051B, 03N906051B, 0986280715

Number of Pins : 3-Pin Connector

Exhaust System : for vehicles with factory fitted soot -/particulate filter

Number of Circuits : 2

Number of Connector : 3

Ø1/ Ø2 : 8 / 8 mm mm

Quantity : 1

Our SKU: TVW03L906051B_94

All our Diesel Particulate Filter Differential Pressure Sensor - 03L906051D are OEM quality and reliable after market car parts. This Diesel Particulate Filter Differential Pressure Sensor - 03L906051D is specifically compatible with Audi: A3, A4, A4 Allroad, A5, A6, Q3, Q5, TT, Seat: Alhambra, Leon, Skoda: Kodiaq, Octavia, Superb, Yeti, VW: Arteon, Beetle, Caddy, Caddy Alltrack, Golf, Golf Sportsvan, Golf Van, Jetta, Passat, Passat Alltrack, Passat CC, Scirocco, Tiguan, Tiguan Allspace, Touareg, Touran, .

Please use our make-model-year tool to check this part's compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.

If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

Key Benefits

Monitors Exhaust Backpressure Accurately
The differential pressure sensor continuously measures exhaust gas pressure differences across the DPF to inform the ECU when soot levels are increasing and regeneration is needed.

Supports Proper DPF Regeneration
Accurate pressure readings ensure the regeneration process is triggered at the correct time, helping prevent filter clogging and maintain exhaust flow.

Helps Reduce Engine Emissions
By enabling timely DPF regeneration, this sensor plays a key role in reducing harmful diesel particulate emissions and supporting compliance with emissions standards. 

Restores Engine Performance When Faulty
Replacing a failing differential pressure sensor can resolve symptoms such as poor fuel economy, increased smoke, high exhaust temperatures, and check engine light warnings related to DPF pressure faults.

Direct Replacement for OEM 03L906051D
Designed to match the original equipment specification, this sensor installs in place of the factory unit on compatible vehicles without modification

Frequently Asked Questions (FAQs)

What does a DPF differential pressure sensor do?
The DPF differential pressure sensor monitors the pressure difference between the exhaust upstream and downstream of the particulate filter and sends this information to the ECU to help determine when to regenerate the DPF. 

What are common signs of a failing sensor?
Symptoms can include increased fuel consumption, excessive exhaust smoke, elevated engine or transmission temperatures, difficulty triggering regeneration, or a glowing engine warning light related to DPF pressure. 

Will a bad sensor affect the DPF?
Yes. A faulty sensor can prevent the ECU from correctly initiating the regeneration process, which may lead to soot buildup, restricted exhaust flow, and eventual DPF damage if left unaddressed. 

Is this a direct replacement part?
Yes. This pressure sensor is designed to replace the original differential pressure sensor marked with 03L906051D and equivalent OEM references on compatible diesel vehicles.

Do I need professional installation?
While the sensor itself is a direct replacement, installation typically requires accessing the exhaust pressure lines and ensuring correct reconnection of hoses and electrical plugs. Professional installation is recommended to ensure accurate operation and avoid misdiagnosis