Mitsubishi Pajero Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) fitted on Mitsubishi Pajero diesel models (such as Pajero IV, V80/V90 with 3.2 DI-D 4M41 engine) captures exhaust soot particles to help meet Euro 4 and Euro 5 emission standards. It is installed at the factory on models from 2006 to 2015 and operates with both passive and active regeneration processes that burn accumulated soot at high temperature.

DPFs are found on:

• Pajero IV (V80/V90/W, code 59W) with 3.2 DI-D, 170 hp (125 kW) 4M41 engine until 12/2010 (Euro 4) and from 09/2008 to 05/2015 (Euro 5 versions with 170-200 hp / 125-147 kW).
• Variants like Montero/Shogun/Pajero 3.2 TD DI-D DPF, 3200 cc, produced between 01/2008 and 05/2015.

The DPF is located under the passenger seat, measuring approx. 830 mm in length and weighing around 7.2 kg.

Common symptoms indicating DPF problems include:

• Increased fuel consumption.
• Loss of engine power.
• Illumination of the Check Engine light on the dashboard.
• Excessive soot and ash buildup up to a maximum of about 60g causing blockage.

If you experience these issues, it is advisable to have your DPF inspected and cleaned or replaced if necessary.

DPF maintenance involves:

• Manual regeneration by driving at 60-80 km/h for 25-30 minutes to reach the temperature needed to burn soot (passive regeneration).
• Using diagnostic tools like VCDS to perform forced active regeneration if needed.
• Adding quality fuel additives to help clean soot and residues from the DPF, catalytic converter, turbo, EGR, and lambda sensor; this requires driving at higher engine speeds.
• Regular motorway driving to avoid short urban trips which promote clogging.

Keep your entire exhaust system clean and do a regular engine de-coking to improve DPF efficiency.

It is recommended to replace the DPF between 120,000 km and 170,000 km to avoid major issues or limp mode activation caused by clogging. Replacement filters use materials like silicon carbide or cordierite designed for durability.

• DPFs for vehicles with OBD systems are factory-fitted and come with mounting kits including fixings and pipes.
• Replacements are fully compliant with European emission norms and come with E-mark certification supporting vehicle inspections.

Only use original-quality parts that meet manufacturer specifications to ensure engine performance and emission regulation compliance.

Limp mode is triggered when the DPF becomes severely clogged, causing excessive exhaust back pressure. This forces the vehicle’s engine control unit (ECU) to reduce power and limit driving speed to protect the engine and exhaust system.

• Common causes include long periods of low-speed driving, lack of forced regeneration, and build-up of soot and ash.
• Regular checking of DPF pressure sensors and fault codes helps prevent unexpected limp mode activation.

Proper maintenance and cleaning of the DPF and exhaust components are essential to avoid limp mode issues.

To confirm if your vehicle has a DPF, you can:

• Check the vehicle specifications by engine code and year (models with 3.2 DI-D 4M41 engine from 2006-2015 typically have a DPF).
• Look under the passenger seat area where the DPF is installed; it is a cylindrical component about 83 cm long.
• Use an OBD diagnostic tool to check for DPF-related fault codes or presence of DPF sensors.

If uncertain, consult a qualified mechanic to read the OBD codes or inspect the exhaust system.

Only use high-quality, brand-new DPFs that meet or exceed original equipment specifications. Reliable suppliers provide products certified by automotive authorities ensuring compliance with Euro 4/5 emissions and durability.

• Quality DPFs are manufactured using stainless steel and advanced ceramic honeycomb monoliths treated with rare metal coatings for superior performance and longevity.
• These products come with warranties (e.g., 3 years or up to 100,000 km) and meet stringent European standards (E-mark certification).

Using low-quality or uncertified parts risks poor engine performance, increased fuel consumption, and can cause limp mode or early failure of the exhaust system.

For the best results, purchase directly from reputable manufacturers or specialists with proven technical expertise in diesel particulate filters.