Toyota Avensis Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) on Toyota Avensis diesel engines traps harmful fine carbon particles (soot) emitted by the engine. It stores and burns these particles via passive regeneration at high exhaust gas temperatures (550-600°C on motorways) or active regeneration using post-fuel injection to increase exhaust temperature.

Located after the catalytic converter in the exhaust line, the DPF is made of ceramic material specifically for Toyota Avensis diesel engines, unlike cordierite filters used on petrol models.

The main functions of the DPF are:

• Particle trapping: Captures microscopic harmful soot particles from diesel combustion to prevent lung penetration.
• Passive regeneration: Automatically burns off soot at high exhaust temperatures during motorway driving (above 550°C).
• Active regeneration: Triggered by the engine control unit when the filter is clogged, using post-injection fuel after the top dead centre to increase temperature in the DPF and burn soot.

Active regeneration typically occurs every 700–1000 km for city driving to avoid clogging. One side effect can be dilution of engine oil by unburnt fuel returning to the crankcase, which increases oil level.

The main diesel Avensis models equipped with DPF are:

• Avensis 2.2 D-4D (AD-FTV / AD-FHV engines, Euro 5) from 01/2009 to present with ceramic DPF, sensitive to clogging.
• Avensis 2.2 ADT251 D-4D (2AD-FTV engine, Euro 4) from 07/2005 to 12/2008.
• Avensis 2.0 D-4D 143 hp with frequent DPF clogging issues in city use.

These models include selective catalytic reduction (SCR) systems with AdBlue to reduce NOx emissions in combination with the DPF.

Common issues and warning signs include:

• Frequent clogging due to urban driving causes high backpressure, triggering the dashboard warning light and limp mode.
• Engine oil dilution from unburnt fuel raising oil level.
• DPF blockage caused by accumulation of ashes which cannot be cleaned by regeneration.

Removing or bypassing the DPF is illegal and significantly increases emissions.

Replacement costs and details:

• New ceramic DPF for 2.2 D-4D Euro 5 (2009+) costs around £540 (approx. 636€) excluding labour.
• New DPF for 2.2 D-4D Euro 4 (2005-2008) around £235 (approx. 279€).
• Complete replacement operation after the catalytic converter typically takes about 9h30 and may cost £445-980 (approx. 524-1156€) for labour.

The total replacement price for parts and labour ranges from approximately £1100 to £1400 (1,292€ to 1,680€).

Installation requires reconnecting DPF pressure sensors and access to the exhaust line. Detailed manuals and video tutorials are available.

Proper DPF maintenance includes:

• Driving regularly at motorway speeds to enable passive regeneration by heating exhaust gases above 550°C.
• Avoiding excessive short urban trips and extended idling which prevent regeneration.
• Monitoring oil levels for fuel dilution signs and changing oil with manufacturer’s recommended intervals using correct specifications.
• Using diagnostic tools like OBD scanners to detect pressure differentials and DPF status.

Some diesel vehicles use additives to lower regeneration temperature, but Toyota Avensis diesel models typically do not require or use these additives.

Most Toyota Avensis diesel models from 2005 onwards, especially 2.0 D-4D and 2.2 D-4D engines, are fitted with a DPF as standard to comply with Euro 4 and Euro 5 emissions regulations.

If unsure, check the vehicle manuals, or inspect the exhaust system for a ceramic filter after the catalytic converter. You may also consult your garage or use an OBD diagnostic tool to confirm the presence and condition of the DPF.

High-quality new DPFs compatible with Toyota Avensis diesel engines can be bought online with express delivery options. These products are manufactured in Europe with stainless steel INOX 409 and certified to meet or exceed manufacturer and legal standards.

• They include a 3-year warranty covering up to 100,000 km.
• Available with technical support and installation manuals.
• Delivery options include standard and express shipping across the UK and Europe.
• Professional buyers can benefit from additional discounts, free delivery, loyalty points, and buy-back services for used parts.

For reliable and efficient DPF solutions, choose European-certified parts and benefit from expert advice by phone or email.

Protect your vehicle’s emissions system and the environment by using genuine quality parts and professional services.