Purpose and Specifications

The TRW PFB401SE is a DOT 4 brake fluid designed to keep your braking system safe and responsive in everyday driving conditions. This 1-liter bottle meets strict international safety standards and is engineered to work reliably across a wide temperature range—from -50°C in winter to +50°C in summer heat.

What makes this fluid effective: it contains advanced additives that clean engine acids from your brake lines, protect metal components from rust, and maintain consistent brake response. The dry boiling point of 260°C means your brakes stay effective even under heavy braking or towing stress.

When to Use / Replace?

Replace your brake fluid every 2 years as part of regular maintenance, or annually if your vehicle uses older DOT 3 fluid. Over time, brake fluid absorbs moisture from the air, which lowers its boiling point and reduces braking safety. Fresh fluid ensures your brakes respond instantly when you need them.

Use this fluid if your vehicle manufacturer specifies DOT 4 compatibility. It mixes safely with other DOT 3, DOT 4, and DOT 5.1 fluids, making it ideal for top-ups or complete system flushes.

Frequently Asked Questions

• How do I know if my brake fluid needs replacing? If your brakes feel soft or spongy, or if it's been 2 years since your last fluid change, have a mechanic check it. Dark or cloudy fluid is a sign of moisture contamination and should be replaced immediately.
• Can I mix TRW PFB401SE with other brake fluids? Yes, this DOT 4 fluid is compatible with DOT 3, DOT 4, and DOT 5.1 fluids. However, for best results, flush the system completely with fresh TRW fluid rather than mixing.
• What temperature range does this fluid handle? This fluid performs reliably from -50°C (winter conditions) to +50°C (hot climates), ensuring consistent braking performance year-round.