Infiniti QX70 Diesel Particulate Filter DPF (2013-2018)

The Diesel Particulate Filter (DPF) in your Infiniti QX70 is a crucial exhaust system component designed to capture and remove harmful fine particulate matter from diesel engine exhaust gases. These particles are carcinogenic and cause environmental pollution as well as health issues. The DPF helps the vehicle meet emission standards and improves air quality by trapping soot and other particles.

The DPF operates through two main cycles:

• Collection cycle: Fine particulates in the exhaust are filtered and trapped as soot deposits on the filter walls.
• Regeneration cycle: The accumulated soot is burned off at high temperatures, cleaning the filter and preventing clogging.

This process is managed automatically by the engine control unit, ensuring effective filtration and longevity of the filter system.

Both terms refer to filters that reduce particulate emissions from diesel engines but differ slightly in technology and placement:

• DPF (Diesel Particulate Filter): Located close to the engine, it burns soot by raising exhaust gas temperature.
• FAP (French term for particulate filter): Positioned mid-exhaust, it uses a catalytic converter with special substances to combust soot.

The Infiniti QX70 3.0d AWD model is equipped with a Euro 5 standard DPF/FAP system to meet emission requirements.

The DPF regeneration is an automatic process controlled by the engine's electronic control unit under suitable conditions. It may not trigger if:

• Fuel level is low
• Sensors are faulty
• The Exhaust Gas Recirculation (EGR) valve is clogged
• Exhaust gas temperature is too low

You can facilitate regeneration by driving at a steady speed with high engine load for a prolonged period, which raises the exhaust temperature and burns off the soot. Regular regeneration can keep the filter functional for up to 150,000–180,000 km.

A clogged DPF cannot clean itself through normal regeneration and will eventually block exhaust airflow. Common symptoms include:

• Reduced engine performance and power loss
• Illumination of the DPF warning light on the dashboard
• Increased emissions and potential engine issues

Ignoring these signs may lead to more severe engine damage and higher repair costs.

Professional DPF cleaning methods include:

• Chemical cleaning: Soaking the filter in a special solution that dissolves accumulated soot.
• Non-disassembly cleaning: Injection of cleaning fluid through sensor holes, which drains by gravity.
• Air and water cleaning with specialized equipment: Using advanced machines like MS900 for environmental-friendly cleaning.

These methods restore the DPF’s efficiency without altering the original engine settings and are recommended for maintaining vehicle performance.

The Infiniti QX70 Diesel Particulate Filter (DPF/FAP) for the 3.0d AWD Euro 5 standard engine includes:

• Length: 765 mm
• OEM References: B08D21BY0A, B08D21BY1A, B08D2-1BY0A, B08D2-1BY1A
• Engine Power: 238 HP (V9X model)
• Production years: From 08/2013 to present

This original quality filter ensures optimal filtration performance aligned with manufacturer standards.

Important points about the DPF include:

• Removing or tampering with the DPF is illegal as it causes the vehicle to no longer meet environmental emission standards.
• Sensors for temperature and differential pressure play a key role in triggering regeneration cycles.
• Regular professional cleaning and maintenance preserve the DPF’s effectiveness and prolong its lifespan.
• Use your Infiniti QX70 vehicle normally without limiting engine temperature to support the passive regeneration process.

For diagnostics or repair, always consult qualified automotive professionals to ensure compliance and vehicle safety.