LIQUI MOLY DOT 5.1 Brake Fluid – Premium Synthetic Protection for Modern Braking Systems

Purpose and Specifications

LIQUI MOLY Brake Fluid DOT 5.1 (250ml, Part No. 3092) is a synthetic brake fluid engineered for modern vehicles with advanced braking systems like ABS and ESP. This premium-grade fluid maintains consistent performance under extreme conditions—high temperatures, heavy braking, and moisture exposure—ensuring your brakes respond reliably every time you press the pedal.

Key Performance Benefits:

• Excellent boiling points: Resists vapor lock even after absorbing moisture over extended use, keeping brakes responsive in demanding conditions
• Low-temperature stability: Flows smoothly in cold weather, ensuring fast brake response when you need it most
• Corrosion protection: Special inhibitors prevent rust and acid buildup inside brake lines and cylinders, extending component life
• Anti-foam technology: Moisture scavengers suppress steam bubble formation, maintaining consistent brake pressure
• Superior lubrication: Protects all moving brake components from wear, keeping your system functioning smoothly

When to Use / Replace?

Replace your brake fluid every 2 years or 40,000 km, whichever comes first. Brake fluid absorbs moisture from the air over time, which lowers its boiling point and reduces braking safety. If you notice soft or spongy brake pedal feel, or if your vehicle has been exposed to extreme heat or water, change the fluid sooner. Always follow your vehicle manufacturer's maintenance schedule and use only DOT 5.1 fluid if your manual specifies it—mixing different DOT grades can damage seals and compromise braking.

Compatibility: Works with all disk and drum brake systems, clutch systems, and is fully compatible with high-quality synthetic brake fluids meeting DOT 3, DOT 4, and DOT 5.1 standards.

Storage: Keep sealed in a cool, dry place. Once opened, use within one season to prevent moisture absorption.

Frequently Asked Questions

Q: Can I mix DOT 5.1 with DOT 4 or DOT 3?
A: DOT 5.1 is compatible with DOT 3 and DOT 4, but it's best to flush the system completely when switching to avoid mixing old fluid with new. Never mix DOT 5 (silicone-based) with glycol-based fluids—they are incompatible.

Q: Why does my brake fluid need changing if it looks clean?
A: Brake fluid absorbs water invisibly through the air. Even clear-looking fluid loses its boiling point protection after 2 years. This moisture can cause brake fade under hard braking or in hot conditions, risking your safety.

Q: Is DOT 5.1 suitable for my older car?
A: Check your owner's manual first. Older vehicles may specify DOT 3 or DOT 4. Using DOT 5.1 in a system designed for DOT 3 can cause seal swelling. Always follow manufacturer specifications.