How to Check Your Car's Brake Fluid

Regular car check ups are essential to keep your car in proper working order. Brake fluid, the substance that cushions the brake pads, should be monitored at every oil change. Learn how to check the brake fluid in your car to ensure your brakes are in working order.

Difficulty: Moderately Challenging

Instructions

1. Find the brake fluid reservoir located in the brake master cylinder. The cylinder is found in the rear of the engine on the driver's side of the car. A cap--usually yellow with the letters "DOT" written on top--covers the reservoir.

2. Check brake fluid level in the cylinder. In newer vehicles, the reservoir is clear with the "max" line and "low" line levels marked. Simply view where the brake fluid is in comparison to the level markers. Older cars don't have clear reservoirs and require further inspection. Remove the cap to the reservoir and look inside. The brake fluid should be two-thirds full. Any amount less requires additional brake fluid.

3. Replace the brake fluid reservoir cap securely. If additional brake fluid is needed, look at the cap and find the number of the type of fluid you need. Most domestic vehicles take "DOT 3" brake fluid; check your owner's manual for the fluid your car requires.

Tips & Warnings

• Read your owner's manual for the suggested schedule of maintenance for your vehicle's make and model.
• If you have very little brake fluid in the reservoir, don't add brake fluid yourself. You should have a professional flush, bleed and refill the cylinder.
• A sudden drop in brake fluid can signify a serious brake problem and requires professional assistance.
• Never overfill the brake fluid. The fluid needs room to expand when heated.