Purpose and Specifications

ATE DOT 4 Brake Fluid (03.9901-5831.2) is a premium hydraulic fluid designed to deliver reliable braking performance in everyday driving and demanding conditions. This 0.5-liter can ensures smooth, responsive brakes by resisting vapor lock and maintaining pressure even when hot.

• High boiling point: Stays effective up to 260°C dry and 155°C wet, preventing brake fade during hard stops or spirited drives.
• DOT 4 standard: Fully compatible with modern ABS, ESP, and ASR systems in cars like BMW, VW, Audi, and Mercedes-Benz.
• Corrosion protection: Special additives shield brake components from rust and wear for longer life.
• Weight: Just 630 grams, easy to handle and store.

When to Use / Replace?

Use ATE DOT 4 for vehicles specifying DOT 4 fluid to keep brakes firm and safe. Replace every 2 years or 40,000 km to avoid moisture buildup that lowers performance. Shelf life is up to 5 years unopened in a cool, dry place.

Ideal for high-heat scenarios like mountain descents or track days where brakes get extra hot.

FAQ

Can I mix this with other DOT 4 fluids? Yes, it's fully compatible with other quality DOT 4 fluids, but for best results, flush the system completely during changes.

Is it safe for my ABS system? Absolutely, meets all standards for ABS, ESP, and ASR with low viscosity for fast response even in cold weather.

How do I know when to change brake fluid? Check every 2 years or if it darkens/boils low; test at a shop for water content over 3%.