Purpose and Specifications

ATE DOT 4 SL brake fluid (03.9901-5801.2) is a premium-quality fluid designed to deliver reliable braking performance in modern vehicles. This 0.5-liter can ensures smooth, responsive brakes by resisting heat buildup and preventing vapor lock during hard stops.

• High boiling point: Stays liquid above 260°C dry and 170°C wet, preventing brake fade in demanding conditions like spirited driving or towing.
• Low viscosity: Flows easily at -40°C for quick response in cold weather.
• DOT 4 compatible: Safe for ABS, ESP, and ASR systems, protecting seals and components from corrosion.
• Shelf life: Up to 5 years unopened when stored cool and dry.

Perfect for European cars requiring DOT 4 fluid, this German-made product meets strict OEM standards for safety and longevity.

When to Use / Replace?

Flush brakes every 2 years or 40,000 km to remove moisture that lowers performance and causes spongy pedals. Replace immediately if fluid looks dark, contaminated, or if brakes feel soft. Ideal for routine maintenance, track days, or upgrading from basic DOT 3.

FAQ

Q: Is ATE DOT 4 SL safe to mix with other DOT 4 fluids?
A: Yes, fully compatible with other DOT 4 fluids, but for best results, flush the system completely during service.

Q: What vehicles use this brake fluid?
A: Suits most cars and light trucks specifying DOT 4, especially BMW, Mercedes, VW, and performance models with advanced braking tech.

Q: How much for a full flush?
A: Typically 1 liter for sedans; this 0.5L can handles top-ups or smaller systems perfectly.