BOSCH DOT 4 Brake Fluid - Premium Hydraulic Braking System Protection

Purpose and Specifications

BOSCH 1 987 479 107 is a premium DOT 4 brake fluid engineered to maintain consistent hydraulic pressure in your vehicle's braking system. This 1-liter bottle delivers reliable stopping power across a wide temperature range, from extreme cold (-40°C) to high-heat braking situations (155°C wet boiling point). DOT 4 fluids like this one are glycol-based and absorb moisture naturally over time, which is why regular replacement is critical for brake safety and performance.

When to Use / Replace?

Replace your brake fluid every 2 to 3 years or every 30,000 to 45,000 kilometers, whichever comes first. If you drive in extreme climates, tow frequently, or use your vehicle for performance driving, change it annually or every 20,000 km. Signs you need a fluid change include a spongy brake pedal, longer stopping distances, or a hard pedal after repeated braking. Fresh brake fluid prevents corrosion inside your brake lines and maintains the hydraulic system's ability to stop your car reliably.

Key Benefits

• Maintains consistent braking pressure in hot and cold conditions
• Prevents moisture-related corrosion in brake lines and cylinders
• Reduces risk of brake fade during aggressive or repeated braking
• Protects seals and internal brake components from degradation
• Premium BOSCH formulation ensures OEM-level performance

Frequently Asked Questions

Q: Why does brake fluid need to be changed if it looks clean?
A: Brake fluid absorbs moisture from the air invisibly. Over 2 years, moisture levels can reach dangerous thresholds that compromise braking performance and cause internal corrosion, even if the fluid appears clear.

Q: Can I use DOT 4 fluid in any vehicle?
A: Check your vehicle's owner manual or brake fluid reservoir cap. DOT 4 is compatible with most modern cars, but some older vehicles or specialty applications may require DOT 3 or DOT 5. Never mix different DOT types.

Q: How do I know if my brake fluid is bad?
A: A spongy or soft brake pedal, longer stopping distances, or a pedal that feels hard only after multiple stops are warning signs. Professional brake fluid testing can measure moisture content and determine if a flush is needed.