Dacia Logan Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) on Dacia Logan diesel models, such as the 1.5 dCi, is an exhaust system component designed to capture harmful fine soot particles emitted by the engine to reduce air pollution. It operates by filtering soot from exhaust gases and periodically regenerating by burning off the accumulated particles at high temperatures, often assisted by catalytic additives or urea injection to speed up oxidation.

The DPF system works in two main phases: filtration and regeneration.

• Filtration: The DPF captures soot particles in a porous ceramic substrate.
• Regeneration: The system burns off gathered soot automatically at 500-600°C, either passively during normal driving or actively triggered by the vehicle’s electronic control unit using sensors monitoring differential pressure across the filter.

Key components include differential pressure sensors at the injection pump and the DPF itself, catalytic converters upstream/downstream, and sometimes urea injection systems for SCR technology.

DPFs are mainly found on diesel variants, including:

• Logan I Pick-Up 1.5 dCi (75 hp / 55 kW, 03/2010-11/2013, engine code U90)
• Logan MCV 1.5 dCi with 68 to 86 hp (engine K9K 796, filter volume 0.4L)

Other Dacia diesel models like Duster and Dokker may have similar DPF systems.

Typical symptoms include:

• Excessive black smoke from exhaust
• Loss of engine power and performance
• Engine hesitation or saccades
• Illuminated DPF or engine warning lights
• Failed DPF regeneration attempts

Common causes are:

• Soot buildup blocking the filter, especially from short urban trips preventing regeneration
• Faulty differential pressure sensors or damaged sensor hoses
• End-of-life filter degradation after typically 80,000 to 140,000 km

Example: A 2017 Logan diesel at 109,682 km experienced black smoke and power loss due to a defective DPF.

Diagnosis requires connecting an OBD diagnostic tool to read error codes such as "Diesel particulate filter internally defective".

Repair options include:

• Professional or eco-friendly cleaning and decarbonization methods to unblock the filter
• Complete replacement of the DPF unit, restoring engine power and fuel efficiency (costs around €1,550 in Dacia workshops)
• Checking and replacing faulty sensor hoses and differential pressure sensors
• Use of additives supporting regeneration at low temperatures (with caution)

Note: Illegal removal of the DPF is not recommended and banned under Euro 2011+ emission norms.

To prevent DPF clogging and extend filter life:

• Regular long highway trips allow the DPF to reach regeneration temperature for automatic soot burn-off
• Conduct early maintenance checks from around 80,000 km to monitor pressure and sensor status
• Ensure timely oil and spark plug changes to maintain engine efficiency and emissions control
• Address warning lights promptly and perform diagnostic checks immediately if issues arise

Proper vehicle operation and adhering to manufacturer guidelines ensure optimal DPF performance and longevity.

When selecting a DPF replacement, consider these points:

• Ensure compatibility with your specific Dacia Logan model and diesel engine version (e.g., 1.5 dCi K9K 796 or U90 engine codes).
• Prefer original, brand-new DPF units manufactured with high-quality materials such as INOX 409 stainless steel and advanced ceramic monoliths treated with thin-layer coatings for maximum durability and efficiency.
• Check certification such as E24-103R confirming compliance with European emission standards.
• Opt for products with a solid warranty, typically 3 years or up to 100,000 km use.

Professional installation and using genuine parts for sensors, gaskets, and injectors are essential for reliable performance and to maintain warranty coverage.

Premium new DPFs for Dacia Logan Diesel are available from specialized manufacturers providing products that meet or exceed original standards. These products are constructed using high-tech ceramic substrates and INOX 409 stainless steel, ensuring excellent filtration, durability, and performance.

• Products often come with a 3-year warranty limited to 100,000 km.
• Delivery is generally fast, with options for standard shipping in 1 to 6 working days within Europe and express 24-48 hours delivery depending on stock and location.
• Ordering before noon usually means same-day dispatch if the product is in stock; out-of-stock items can often be manufactured within 2 working days.
• Free returns within 30 days are available for unused products in original packaging, with clear return instructions.

For the best results and reliable fast shipping, order from trusted suppliers who provide direct-from-factory quality and technical support.

Always consult a professional installer for mounting to ensure correct sensor mounting and functional integration into your Logan Diesel’s exhaust system.