Liqui Moly Pro-Line Diesel Particulate Filter Cleaner 1 L — Professional in‑situ soot dissolver, reduces backpressure

Liqui Moly Pro-Line Diesel Particulate Filter Cleaner is a professional-grade 1 L fluid that dissolves soot and deposits inside DPF/GPF units without disassembly, restoring flow and helping recover performance.

Designed for workshop use, this concentrated cleaner targets accumulated soot, ash and combustion residues inside diesel particulate filters (DPF) and gasoline particulate filters (GPF) while the unit remains installed. Used together with Liqui Moly Pro-Line Diesel Particulate Filter Purge and the recommended application tools, it loosens and flushes trapped contaminants to reduce backpressure and improve fuel economy. This product is intended for trained technicians in repair shops and fleet maintenance operations.

How does this cleaner work without removing the DPF?

The formula penetrates soot deposits and chemically breaks down particles inside the filter channels, enabling them to be flushed out during a purge cycle. Application uses a pressurized spray system and probe to introduce the cleaner directly into the filter’s inlet, so no dismantling is required.

• Concentrated liquid engineered to dissolve soot and combustion residues
• Applied in situ via DPF pressurized tank spray gun and probe
• Complements the Pro-Line Diesel Particulate Filter Purge for removal

What tools and parts do I need to apply it correctly?

For safe and effective treatment, use Liqui Moly’s recommended application equipment to reach all filter channels and ensure even distribution. The system components create the pressure and access required to treat DPFs while installed.

• DPF Pressurized Tank Spray Gun (part no. 7946) for controlled application
• DPF-Probe with five interchangeable tips (part no. 7945) for nozzle access
• DPF Spray Probe long (part no. 20630) if deeper or hard-to-reach inlets exist

What benefits can a workshop expect after treatment?

A treated filter typically shows reduced exhaust backpressure and can restore driving response and efficiency lost to clogging. Regular maintenance with this cleaner helps delay or prevent costly filter replacement by keeping the filter channels clear.

• Improves exhaust flow and can reduce regeneration frequency
• Helps recover vehicle performance and can reduce fuel consumption
• Reduces likelihood of costly DPF removal or replacement if used as part of regular service

Are there any compatibility or usage limits I should know?

This product is intended for professional repair shops and trained technicians; it is not formulated for DIY roadside use. Always pair it with Liqui Moly Pro-Line Diesel Particulate Filter Purge (part no. 20112) and follow manufacturer tool instructions for safe treatment.

• Suitable for diesel particle filters (DPF) and gasoline particulate filters (GPF) installed on vehicles
• Not a substitute for mechanical repair of damaged filters—use as a cleaning/maintenance agent
• Follow workshop safety guidelines and equipment manufacturer instructions

Who is this for: Liqui Moly Pro-Line DPF Cleaner 1 L is aimed at professional mechanics, independent repair shops, and fleet maintenance teams that service diesel and particulate-filter-equipped gasoline vehicles. If you maintain vehicles with clogged filters and need an in-situ cleaning solution to restore flow and postpone filter replacement, this product—used with the matching purge fluid and Liqui Moly application tools—is built for your workflow.