ATE DOT 4 Brake Fluid – Premium Hydraulic Braking Performance

Purpose and Specifications

ATE 03.9901-6203.2 is a premium DOT 4 brake fluid engineered for modern vehicles with anti-lock braking systems (ABS) and electronic stability control. This 5-liter canister delivers superior heat resistance and moisture control compared to standard DOT 3 fluids, keeping your brakes responsive in demanding driving conditions.

Key Performance Benefits:

• Higher Boiling Point: Resists brake fade at temperatures up to 230°C (446°F) dry and 155°C (311°F) wet – ideal for towing, mountain driving, and spirited braking
• Moisture Management: Absorbs water gradually over time while maintaining brake performance longer than DOT 3
• ABS Compatibility: Optimized low-temperature viscosity ensures crisp ABS response even in winter conditions below –40°C
• Corrosion Protection: Protects cast iron, steel, aluminum, and brass components from oxidation and acidic buildup
• Seal Compatibility: Maintains proper seal function and prevents leakage in hydraulic circuits

When to Use / Replace?

Use ATE DOT 4 if your vehicle manufacturer specifies DOT 4 or higher. Replace every 2 years or as recommended in your service manual, whichever comes first. Brake fluid absorbs moisture from air, which reduces boiling point and increases corrosion risk over time. Replace sooner if you frequently tow, drive in mountains, or use your vehicle for track days.

Operating Temperature Range: –40°C to +100°C (–40°F to +212°F)

Shelf Life: 3–5 years in sealed, unopened containers when stored in cool, dry conditions

Compatibility: Can be mixed with other DOT 3, DOT 4, and DOT 5.1 glycol-based fluids. Do not mix with DOT 5 silicone fluid.

Frequently Asked Questions

Q: Can I use DOT 4 if my car calls for DOT 3?
A: Yes. DOT 4 has a higher boiling point and better moisture resistance, so it's a safe upgrade. However, always check your owner's manual first, as some older vehicles may have specific requirements.

Q: How do I know if my brake fluid needs replacing?
A: If your brake pedal feels soft or spongy, or if you notice longer stopping distances, have your fluid tested or replaced. Most mechanics recommend a two-year replacement interval regardless of appearance.

Q: Will DOT 4 improve my braking performance?
A: DOT 4 prevents brake fade better than DOT 3 in high-heat situations (towing, mountains, track use). For normal daily driving, the difference is minimal, but DOT 4 provides a safety margin and longer service life.