Soft or Spongy Brake Pedal: Causes and Dangers

Your brake pedal should feel firm and consistent every time. If it feels soft, spongy or travels further than it used to, something is wrong with your braking system.

Common causes

Air in the brake lines

Air can get into the system during repairs or if the fluid level gets too low. Air compresses, unlike brake fluid, so the pedal feels spongy. Bleeding the brakes removes it.

Old or contaminated brake fluid

Brake fluid absorbs moisture over time. When brakes get hot, that moisture can turn to vapour, making the pedal soft. Jamaica's humidity and hilly roads make this more likely.

Brake fluid leak

Leaks can come from brake lines, hoses, calipers, wheel cylinders or the master cylinder. Look for wet spots near the wheels or a dropping fluid level.

Failing master cylinder

If the pedal slowly sinks toward the floor while you hold it down at a stop, the master cylinder's internal seals may be worn.

Worn brake pads or shoes

Very worn pads, or rear drum brakes that need adjusting, can increase pedal travel.

Warning signs to take seriously

• Pedal sinks slowly while holding it at a stop

• Brake warning light on the dashboard

• Brake fluid level dropping

• The car takes longer to stop

Is it safe to drive?

A soft brake pedal is a safety issue. If the pedal goes to the floor, don't drive the car. If it's slightly soft, drive carefully and have it inspected as soon as possible.

The fix

A proper inspection checks fluid condition and level, looks for leaks, inspects pads and checks the master cylinder. Many causes, like old fluid or air in the lines, are quick to fix.

Need help with this? RCJ Mobile Mechanics comes to you in Portmore, Spanish Town, Kingston, St. Andrew and across St. Catherine. Call or WhatsApp (658) 207-6565 or book a mechanic online.