How to Check Brake Fluid
Learn how to check brake fluid with our detailed step-by-step guide. Follow our easy instructions to get it done right.
Your Progress
0 of 6 steps completedStep-by-Step Instructions
1 Step 1: Locate Brake Fluid Reservoir
Step 1: Locate Brake Fluid Reservoir
Find translucent reservoir on master cylinder near firewall (usually driver side).
2 Step 2: Check Fluid Level When Cold
Step 2: Check Fluid Level When Cold
Check with engine off and cold - fluid expands when hot and gives false reading.
3 Step 3: Inspect Level Against Min/Max Marks
Step 3: Inspect Level Against Min/Max Marks
Look through reservoir at fluid level - should be between MIN and MAX lines.
4 Step 4: Check Fluid Color
Step 4: Check Fluid Color
Brake fluid should be clear to light amber - if dark brown or black, needs flushing.
5 Step 5: Top Off if Low
Step 5: Top Off if Low
If below MIN line, clean cap area, remove cap, add correct DOT-rated fluid to MAX line.
DOT 3 Brake Fluid
Standard brake fluid for most vehicles (32 oz)
DOT 4 Brake Fluid
Higher temp brake fluid for performance vehicles
6 Step 6: Investigate if Significantly Low
Step 6: Investigate if Significantly Low
Brake fluid doesn't evaporate - low level indicates worn pads or leak requiring inspection.
Brake Inspection Guide
Book on diagnosing brake system problems