1. Air in Brake Lines (Most Common Cause)
Hydraulic brakes require compressed fluid, not air.
Facts
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Air compresses; fluid doesn’t
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Causes long pedal travel
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Fix requires bleeding brakes
2. Brake Fluid Boiling
High temperatures cause moisture in fluid to boil.
Results
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Vapor bubbles
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Spongy pedal
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Reduced braking force
3. Worn Master Cylinder
Internal seals fail, causing fluid bypass.
Symptoms
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Pedal slowly sinks
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Weak braking even with full fluid
4. Rear Drum Brake Misadjustment
Drums require precise tension.
Conclusion
A soft pedal indicates air, boiling, or master cylinder failure.
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