Fiat Multipla Diesel Particulate Filter DPF (1998-2010)

The Diesel Particulate Filter (DPF) on the Fiat Multipla 1.9 JTD (2005-2010, Euro 4, engine 186A9000, 1910 cc, 88 kW / 120 hp) is an emission control device located under the seat in the exhaust system. It traps harmful diesel particulates (soot) to reduce air pollution.

It works in two phases: filtering soot particles and an automatic active regeneration phase where the trapped deposits are burned off at high temperature (~600°C) when reaching a critical level.

The main role of the DPF is to reduce fine particle emissions by trapping soot, combined with an integrated catalytic converter compliant with Euro 4 standards. The Exhaust Gas Recirculation (EGR) valve, linked to this system, recirculates part of the exhaust gases to reduce NOx emissions but can become clogged, especially in city driving.

• DPF traps soot and triggers automatic regeneration on highways.
• EGR valve reduces harmful NOx gases but is prone to clogging.
• Regeneration is automatic during prolonged motorway runs but may need manual forced regeneration during city driving.

Common OEM references include 51780154, 51770423, with aftermarket options also available.

DPF clogging is frequent, especially after short urban trips and low engine temperatures, causing:

• DPF warning light illuminated on dashboard
• Loss of engine power and reduced driveability
• Black smoke emissions and irregular idling
• Possible limp mode activation

These issues are often linked to soot accumulation shared with the EGR system and failing sensors. Proper diagnosis including differential pressure checks is needed.

Regular cleaning is recommended especially if the vehicle is used mainly in urban areas:

• Use liquid additives in the fuel tank to reduce soot and improve regeneration
• Professional cleaning services such as engine decarbonisation and dedicated DPF cleaning
• Forced regeneration via OBD diagnostic tools or extended motorway driving to reach required temperatures

Following these servicing recommendations helps maintain DPF efficiency and avoids costly replacements.

When cleaning is no longer effective, replacement is necessary. Key points include:

• New DPF with integrated catalytic converter costs approx. €260 (reference FCD5968), including mounting kit and fast delivery
• Workshop change with labour included typically starts around €1,076 VAT included
• Detailed DIY guides and video tutorials are available for competent users to replace the DPF
• Important to check exact model compatibility and consult a garage before replacement

Note that removal or deletion of the DPF is illegal for road use and voids emission compliance.

While there are replacement stainless steel tubes available (e.g., Ragazzon) and ECU reprogramming to bypass the DPF, these modifications are illegal for road traffic under Euro 4 regulations.

They belong to motorsport or off-road kit (Group N) only. Removing the DPF will also cause increased emissions and likely fail vehicle inspections.

• Non-compliant with Euro 4 standards
• Illegal for on-road use
• May void warranty and insurance

We strongly recommend maintaining the original DPF for environmental and legal reasons.

The DPF regenerates by burning off soot deposits at high temperature (~600°C). Regeneration is automatic but requires certain conditions:

• Minimum engine speed and load conditions (usually achieved on motorway runs)
• Proper functioning sensors and exhaust gas flow
• Clean fuels and recommended oil additives to aid regeneration

Urban driving with short trips and stop-start traffic often prevents temperatures rising enough for regeneration, leading to clogging and warning lights.

Krosfou offers high-quality, brand-new DPFs and catalytic converters specifically manufactured for Fiat Multipla 1.9 JTD models. Products feature:

• 3 years warranty for up to 100,000 km usage
• Manufactured from INOX 409 stainless steel with premium ceramic monoliths
• Certified TÜV SÜD Automotive quality meeting or exceeding original equipment standards
• Available with technical support, fitting guides, and fast delivery options

We also recommend using compatible DPF additives and professional cleaning services for optimal results. Always check product references and vehicle compatibility before purchase.