Saab 9-5 Diesel Particulate Filter DPF 2 (Ii) (2009-2011)

The Diesel Particulate Filter (DPF 2) on Saab 9-5 diesel models, particularly the second generation (2009-2012), is a critical exhaust component designed to capture fine soot particles from the exhaust gas of diesel engines. It is essential for compliance with Euro 5 emission standards on engines like the 2.0 CDTI (A20DTH, 160 hp) and 1.9 TiD. This filter reduces harmful particulate emissions and contributes to cleaner air quality.

The DPF 2 system is mainly found on:

• Saab 9-5 II (2009-2012), primarily with the 2.0 CDTI engine (code A20DTH), 160 hp, Euro 5 compliant (production years 05/2010–12/2011).
• Saab 9-5 OG (2006-2010) diesel variants equipped with the 1.9 TiD engine.

Original Equipment (OE) reference numbers for the DPFs include 855403, 55574666, 855531, 55562315, and 95526824.

Typical issues include:

• "Service Vehicle Soon" warning light and limp mode activation, often caused by a faulty DPF sensor, especially in 2.0 TiD4 engines.
• DPF clogging due to repeated short trips that prevent proper regeneration.
• Engine strain and fuel consumption increase if forced regeneration is done repeatedly under stress conditions.

Regular maintenance such as fuel filter checks, monitoring engine oil quality, and inspection of the exhaust system help preserve DPF function.

The DPF must regularly undergo regeneration to burn off accumulated soot:

• Automatic regeneration: Happens during long highway driving at sufficient engine speed and temperature, which burns the particles off naturally.
• Forced regeneration: Performed using diagnostic tools when automatic regeneration fails or the filter is heavily clogged. Tools include eSID9-5 (video-guided procedure) and Tech II (used only in extreme cases to avoid engine stress).

It is recommended to prioritize long driving at highway speeds to facilitate natural regeneration and avoid stress on the engine.

New, high-quality DPFs compatible with Saab 9-5 diesel models are available with features including:

• Manufactured with cordierite ceramic monoliths and stainless steel INOX 409 casing.
• Compliant with Euro 5 emission standards and original technical specifications.
• Offered with mounting kits and homologation documentation (E-mark certified).
• Backed by a 3-year warranty and professional technical support.

Advanced manufacturing ensures high durability and performance while maintaining vehicle emission compliance and fiscal benefits.

For Saab 9-5 II 2.0 TiD DPF 160 hp engines, products such as the RaceChip Pro 2 add-on box can optimize engine signal processing and provide power gains without altering or damaging the DPF system.

• Ensure software compatibility and Euro 5 standards are met before installation.
• Do not modify or bypass the DPF system to maintain legal compliance.

Such solutions can enhance engine performance while keeping emissions control intact.

DPF condition can be checked by:

• Monitoring warning lights such as "Service Vehicle Soon".
• Using OBD or Tech II diagnostic tools for pressure differential, temperature, and sensor readings.
• Visually inspecting the exhaust system and related sensors.
• Ensuring regular fuel filter and engine oil maintenance to reduce DPF clogging risk.
• Driving regularly at highway speeds to allow natural regeneration of the DPF.

If persistent issues occur, consult a Saab specialist for accurate diagnostics and professional service.

Useful resources include:

• Online forums such as Saabworld.net and UKSaabs.co.uk for user experiences and regeneration tips.
• Video tutorials like "eSID9-5 - Force DPF Regeneration" on YouTube.
• Official Saab diesel maintenance manuals and guides.
• Professional suppliers offering technical support, installation manuals, and product warranty details.

Always verify engine compatibility via your Vehicle Identification Number (VIN) before purchasing or servicing your DPF system.