BMW 6 Series Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) is an exhaust gas filtering device installed in the BMW 6 Series diesel vehicles. Its main function is to capture and reduce harmful particulate emissions produced during diesel combustion, helping to comply with environmental regulations and reduce pollution.

The DPF is made of ceramic materials with microscopic channels that trap soot and carbon particles formed in the exhaust gas. Exhaust gases are forced to pass through the filter walls, which allow gas to flow while retaining harmful particulates. Over time, the trapped soot accumulates and the system initiates a regeneration process to burn off these deposits.

DPF regeneration is the process of burning the accumulated soot in the filter to prevent clogging and maintain filter efficiency. There are two types of regeneration:

• Passive regeneration: Occurs naturally during long high-speed driving where exhaust gas temperatures are high enough to burn off soot.
• Active regeneration: Triggered by the engine control unit (ECU) when soot levels are high, injecting additional fuel to increase exhaust temperature and burn the soot, typically lasting about 30 minutes and may activate a dashboard warning light.

Regular driving conditions and maintenance help ensure this system operates correctly.

Common issues that cause DPF failure include:

• Clogging due to incomplete soot burn: Leads to increased exhaust backpressure and reduced engine performance.
• Ash accumulation: Produced from engine oil combustion and cannot be burned off, progressively blocking the filter.
• Overheating: Excessive temperatures may damage ceramic components.
• Fuel contamination: Sulfur or water in fuel can degrade DPF materials.
• Faulty DPF sensors: Cause incorrect regeneration cycles or prevent proper system function.
• Insufficient maintenance or incorrect oil: Using oils not low in sulfated ash, phosphorus, and sulfur (low SAPS) may cause rapid soot build-up.

Proper driving, fuel quality, and scheduled maintenance reduce these risks.

Symptoms indicating a DPF problem include:

• Unusual engine or exhaust noises such as clicking due to pressure build-up.
• Reduced acceleration and overall engine power loss.
• Strong, unusual exhaust odors resulting from incomplete combustion.
• Illumination of the DPF warning light or engine fault codes on the dashboard.

Early detection prevents costly repairs and maintains emission control.

To maintain DPF health:

• Use engine oil with low SAPS chemistry designed for engines with particulate filters.
• Ensure high-quality, clean diesel fuel to avoid contamination.
• Drive regularly at speeds that allow passive regeneration (e.g., highway driving).
• Follow scheduled inspections and use diagnostic tools to check sensor and filter conditions.
• Address warning lights promptly and allow any active regeneration cycles to complete.

Regular care ensures efficient emission reduction and prolongs the DPF lifespan.

Since 2009, all diesel vehicles including BMW 6 Series must be equipped with a functional DPF under Euro 5 emission regulations. Driving without a working DPF can cause:

• Failed vehicle emission and roadworthiness inspections.
• Restrictions or bans from certain road areas due to excessive pollution.
• Environmental harm due to increased particulate emissions.

Maintaining a clean and operational DPF is not only important for vehicle performance but also a legal obligation.

Krosfou provides brand-new, high-performance Diesel Particulate Filters for BMW 6 Series, manufactured in Europe with premium stainless steel and advanced ceramic monoliths. Benefits include:

• Strict compliance with manufacturer specifications and European regulations.
• Certified quality superior or equal to original parts by TÜV SÜD Automotive.
• A robust 3-year warranty up to 100,000 km usage.
• Direct factory prices with expert technical support.
• Fast delivery options across Europe and internationally.

Choosing Krosfou ensures you get durable, efficient, and regulation-compliant DPF solutions for your BMW 6 Series diesel vehicle.