Subaru Outback Diesel Particulate Filter DPF 5 (V) (2014-2019)

The Diesel Particulate Filter (DPF) in the Subaru Outback captures soot particles generated by the diesel engine combustion. It consists of a ceramic or metallic substrate that traps soot, sensors that monitor soot buildup and trigger regeneration, and a regeneration system that burns off accumulated residues during active or passive cycles.

The Euro 5 standard DPF is compatible with Subaru Outback BR 2.0 D AWD models produced between October 2010 and January 2014. Some later models (2013-2015) also use specific Euro 5 mounting kits to ensure compliance.

The Subaru Outback BR 2.0 D AWD with EE20Z engine (150 PS) features:

• Power: 110 kW (150 PS)
• Torque: 350 Nm
• Displacement: 1998 ccm
• 0-100 km/h acceleration: 9.2 seconds
• Top speed: 195-200 km/h
• Fuel consumption: 5.9 l/100 km
• Towing capacity: 1700 kg (braked)
• 5-speed transmission

DPF dimensions and materials include:

• Weight: 5.8 kg
• Length: 630 mm
• Material: Cordierite or Silicon Carbide
• Emission standard: Euro 4 / Euro 5

Signs of a defective DPF include:

• Increased fuel consumption
• Loss of power and reduced acceleration
• Illumination of the "Check Engine" warning light
• Failure in emissions testing

Regular maintenance includes:

• Driving at 60 to 80 km/h for 25-30 minutes to reach temperatures sufficient for ash elimination
• Using VCDS diagnostics to force regeneration cycles if needed
• Monitoring ash buildup, with a maximum of 60 grams before replacement is required

Replacement is recommended between 125,000 and 185,000 kilometers to avoid major issues. While cleaning can provide temporary relief, OEM replacement DPFs are the most reliable and durable solution, carrying a 3-year warranty under normal use.

• Always use OEM-quality replacements made with high-grade materials and certified to meet or exceed original specifications.
• Follow proper installation procedures including software updates to the ECU and replacement of associated gaskets and sensors.

Common causes of clogging include:

• Frequent short trips preventing full regeneration
• Use of poor-quality diesel fuel
• Obstructed exhaust system components
• Sensor failures or engine control unit issues

Proactive maintenance and appropriate driving habits can help avoid premature clogging.

Maintenance tips include:

• Regular highway driving to allow complete regeneration cycles
• Using premium diesel fuel with cetane additives
• Monitoring soot levels with diagnostic apps and tools
• Changing engine oil promptly after DPF replacement

Looking ahead, innovations such as smart sensors, AI-assisted regeneration, and eco-friendly substrate materials aim to improve DPF effectiveness and durability.