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Brake fluid Defined: Explanation and Key Concepts


Brake fluid is a vital component in a vehicle’s braking system, responsible for ensuring proper functioning of brakes. In the context of roadworthy certificates and vehicle inspections, understanding brake fluid and its properties is crucial for ensuring road safety and compliance.


Brake fluid, also known as hydraulic fluid, is a specialized type of fluid used in hydraulic brake and clutch applications in vehicles. It transfers force under pressure from where it is created through hydraulic lines to the braking mechanism near the wheels.

Key Features or Components:

Brake fluid consists of glycol-ether, borate esters, and other components. It possesses high boiling points and low freezing points, ensuring optimal performance in various weather conditions.

Importance in Roadworthy Certificates:

Brake fluid’s integrity is paramount for roadworthy certificates as it directly affects a vehicle’s braking efficiency and safety. Proper functioning brake fluid is essential to avoid accidents and maintain regulatory compliance.

Inspection Criteria:

Inspectors check brake fluid levels, color, and clarity during roadworthy certificate evaluations. Contaminated or low brake fluid levels can lead to inspection failure due to compromised braking performance.

Common Issues and Failures:

Common issues include fluid leakage, moisture contamination, and insufficient levels. These problems can lead to decreased braking efficiency and are common causes for roadworthy certificate failures.

Maintenance and Repairs:

Regularly check brake fluid levels and quality. If issues arise, consult a professional mechanic to flush and replace the fluid. Regular maintenance ensures optimal brake performance and compliance.

Regulations and Standards:

Brake fluid standards are outlined in regulations such as FMVSS 116 and DOT standards. Compliance with these regulations is essential for obtaining roadworthy certificates.

Examples and Illustrations:

Brake fluid Defined: Explanation and Key Concepts