Audi Q3 Diesel Particulate Filter DPF 1 (I) (2011-2018)

The Diesel Particulate Filter (DPF) on Audi Q3 diesel engines captures fine particulate matter from combustion gases. It uses a porous ceramic substrate (made from cordierite or silicon carbide) that traps over 90% of soot particles before exhaust gases are released. The system works in tandem with the catalytic converter, forcing exhaust through alternating sealed ends to filter particulates and reduce pollution significantly.

The DPF regenerates automatically through high-temperature combustion cycles (~600°C) that burn accumulated soot deposits. This regeneration process is controlled by sensors monitoring differential pressure and temperature, along with the engine control unit. The Audi Q3 2.0 TDI models with Euro 6 standards often also include SCR systems to further reduce emissions.

Signs that your Audi Q3’s DPF is faulty include:

• Illuminated DPF warning light on the dashboard and entry into limp mode with reduced power.
• Loss of engine power, increased fuel consumption, black smoke emission, and strong exhaust smell.
• High soot levels (>40%) making forced regeneration impossible, risking total clogging.
• Error codes such as P2002 indicating low DPF efficiency, often due to faulty sensors mimicking blockages.
• Low pressure readings in OBD scans usually point to defective differential pressure sensors rather than an actual blocked DPF.

It is essential to first check the differential pressure sensors, as sensor failure can falsely indicate a clog.

Proper DPF maintenance includes:

• Performing passive or preventive regeneration by driving 25-30 minutes at speeds of 60-80 km/h in 5th or 6th gear to heat the exhaust and burn soot (ideal ash load less than 60g).
• Using approved diesel additive products (e.g., 300ml DPF cleaner added to the fuel tank) that help lower the regeneration temperature.
• Undergoing forced regeneration via diagnostic tools like VCDS or ODIS at professional garages, which resets the soot counters (temporary if sensors fail).
• Opting for professional cleaning services such as REFAP, which involves disassembly, ceramic channel cleaning, sensor inspection or replacement, reinstallation, and system reset.
• Using advanced decarbonization techniques like Hydrogen cleaning combined with Xenum additives to clean both the DPF and engine.
• Adhering to regular maintenance intervals, typically every 100,000 km or sooner if clogging signs appear, and preferring highway driving over purely urban use to preserve DPF life.

Note that regeneration in limp mode should only be used for severe cases and not as a preventive measure.

The DPF replacement is recommended generally between 140,000 and 200,000 km or earlier if the filter is no longer regenerable due to excessive ash accumulation (>60g) or damaged ceramic substrate.

• OEM or aftermarket DPF parts compatible with Euro 6 standards, including OBD and SCR functions, typically range from 500€ to 1500€ excluding installation costs.
• A complete diagnostic including sensor, turbo, and EGR checks should be performed prior to replacement to ensure all system components are functioning properly.

Consider professional assessment before replacement to avoid unnecessary costs and ensure correct servicing.

Key DPF specifications for Audi Q3 include:

• High-quality ceramic materials: cordierite or silicon carbide for durability and effective filtration.
• Compliance with Euro 6 emission standards for most modern 2.0 TDI engine variants.
• Integration with on-board diagnostics systems (OBD) to monitor differential pressure and soot levels.
• Typical additive dosing capacity around 300ml for DPF cleaning solutions.
• Replacement interval between 140,000 to 200,000 km under normal use.

This ensures high filtration efficiency, long service life, and compliance with stringent emission regulations.

Diagnosing DPF issues involves:

• Using an OBD scanner to read soot accumulation percentages and pressure sensor data.
• Checking for fault codes such as P2002 indicating low DPF efficiency.
• Monitoring dashboard warning lights related to DPF and emission systems.
• Observing driving symptoms like power loss, increased fuel consumption, or excessive smoke.
• Validating that differential pressure sensors are functioning correctly as sensor faults often mimic filter clogging.

Professional diagnostic services are recommended for accurate evaluation and repair guidance.

Krosfou offers brand-new, high-performance Diesel Particulate Filters for Audi Q3 models, manufactured in Europe with certified quality.

• Products made with INOX 409 stainless steel and advanced ceramic monoliths for exceptional durability and filtration.
• Certified by TÜV SÜD Automotive GmbH, exceeding or matching original manufacturer standards.
• All DPFs come with a 3-year warranty limited to 100,000 km of use.
• Free returns within 30 days for unused, original condition parts in Europe.
• Fast shipping across Europe and internationally with express options.
• Technical support and installation assistance are available.

Choosing direct-from-factory quality parts ensures reliable performance and helps protect your vehicle and the environment.