Liqui Moly Diesel Intake System Cleaner 400 ml — Pro-Line workshop strength for soot, oil and carbon removal

This workshop-grade 400 ml cleaner uses a high-tech solvent blend and targeted additives to break down and remove the common contaminants that restrict airflow and affect diesel engine responsiveness. It’s formulated for complete intake-system cleaning, helping restore moving parts’ functionality and supporting fuel-efficiency without disassembly of the entire intake tract.

How does this product improve intake and throttle valve performance?

The cleaner softens and detaches carbon, oil films and soot so they can be removed safely. Regular use helps free sticky components, reducing hesitation and helping the engine breathe more freely.

• Dissolves greasy deposits on throttle bodies and intake ports
• Removes soot buildup that restricts airflow
• Restores freer movement of intake-related components

When should I use the LIQUI MOLY intake system cleaner?

Apply it during routine maintenance if you notice reduced throttle response, rough idling, increased fuel consumption, or visible deposit buildup. It’s especially useful after long idling periods or heavy stop-and-go driving that accelerates soot and oil accumulation.

• At scheduled service intervals or when performance drops
• After extended low-speed or city driving
• Before diagnostic work to rule out intake contamination

What are the practical benefits for a diesel engine owner?

Using this cleaner can help maintain consistent engine behavior and contribute to lower fuel use by removing flow restrictions. It also supports long-term reliability of diesel engines by keeping intake components free of harmful deposits.

• Helps reduce fuel consumption caused by clogged airflow paths
• Improves engine response and smoother idling
• Supports overall diesel engine reliability

How is the product applied and what precautions are recommended?

The 400 ml aerosol is designed for workshop use—direct spray into the intake system or onto the throttle valve per service instructions. Use in a well-ventilated area, wear appropriate PPE, and follow vehicle manufacturer guidance to avoid damage to sensors or delicate components.

• Spray into intake or throttle area as directed during service
• Work in ventilated conditions and avoid inhalation
• Follow vehicle OEM instructions and protective measures

Who is this for: LIQUI MOLY Pro-Line Diesel Intake System Cleaner is aimed at professional workshops, technicians, and knowledgeable DIYers who service diesel vehicles and want an effective, concentrated product to remove oil, soot and greasy deposits from the intake and throttle valve area. It’s ideal when you need a focused cleaning solution that supports fuel-efficiency and the reliable movement of intake components without extensive disassembly.