Infiniti FX Diesel Particulate Filter DPF 2 (Ii) (2008-2014)

The Diesel Particulate Filter (DPF) on Infiniti FX diesel models, such as the FX S51 3.0 D AWD with V9X engine, is an exhaust system component designed to capture and remove soot particles produced during incomplete combustion of diesel fuel. It reduces harmful particulate emissions to protect the environment and ensure regulatory compliance.

The DPF is a ceramic filter with a honeycomb structure and porous walls that trap soot particles from exhaust gases. It uses two main processes:

• Capture: Exhaust gases pass through blocked porous walls, depositing soot while letting cleaner gases exit.
• Regeneration: Soot is burned off to clean the filter either passively at exhaust temperatures above 600°C or actively by the engine control unit injecting extra fuel to raise temperature to 600-650°C.

Regular regeneration keeps the DPF functional and prevents clogging.

The DPF is mainly fitted on Infiniti FX diesel models produced between 2008 and 2014, particularly the FX S51 3.0 dCi V9X 238 to 245 HP AWD versions. The DPF is integrated with the catalytic converter in the exhaust system.

• Model years: 2008–2014
• Engine: 3.0 dCi V9X diesel
• Power output: 238-245 HP

This component is vital for meeting Euro emission standards on these models.

When the DPF becomes clogged with excessive soot, several problems may occur, including:

• Black smoke emissions from exhaust
• Loss of engine power and reduced performance
• Activation of the engine warning light (e.g., error code P2463)
• Increased exhaust backpressure affecting turbocharger operation
• Engine operating in limp or degraded mode

Causes include frequent short urban trips, defective sensors, EGR valve clogging, low fuel levels, or insufficient exhaust temperature to trigger regeneration.

Diagnosis involves measuring the differential pressure across the DPF at idle and acceleration to ensure it does not exceed approximately 50 mbar, which indicates clogging. Additionally, sensors measuring exhaust temperature and pressure feed data to the engine control unit (ECU) for regeneration control. Common diagnostic tools may read fault codes related to DPF functionality.

To maintain or restore the DPF, consider these options:

• Forced Regeneration: Driving at a constant elevated engine RPM (>2000 rpm) on highways for 20-30 minutes to trigger auto regeneration.
• Professional Cleaning: Ultrasonic or rinsing services performed in specialized workshops usually completed within a few hours requiring DPF removal.
• DPF Additive Cleaner: Injection of a 450 ml aerosol cleaner into the fuel system to help burn soot during driving.
• Replacement: Installing a new original or high-quality aftermarket DPF, though costly.
• DPF Removal: Not recommended and illegal in many countries due to emission regulations.

Regular maintenance and avoiding short trips help prolong DPF lifespan.

Preventive measures include:

• Avoiding frequent short urban journeys that prevent the engine and exhaust from reaching regeneration temperatures.
• Using high-quality premium diesel fuel to reduce particulate formation.
• Regularly checking and maintaining the EGR valve and sensors to ensure proper exhaust gas recirculation and sensor feedback.
• Carrying out periodic forced regeneration runs by driving on the highway at sufficient RPM.

These habits contribute to better fuel delivery and engine efficiency, keeping the DPF functioning optimally.

High-performance, brand-new DPFs manufactured in Europe with stainless steel INOX 409 housing and advanced ceramic monoliths are available with a 3-year warranty. These are original, not refurbished parts, certified by leading European automotive authorities to meet or exceed manufacturer specifications and emission standards.

• Manufactured with premium ceramics and special thin-layer coatings for durability
• Certified by TÜV SÜD Automotive GmbH Munich
• Compliant with European regulations for emission control
• Delivered quickly across Europe and worldwide
• Benefit from free returns within 30 days if unused and original

Proper installation by a qualified professional following manufacturer guidelines is recommended to maintain warranty and performance.