If your parking brake won’t engage, it means your car may roll when parked on an incline. The parking brake (also known as the emergency brake or handbrake) is a critical safety feature designed to keep your vehicle stationary when parked and provide emergency braking if needed. A parking brake that won’t engage should be inspected immediately.

What does it mean if the parking brake won’t engage?

This usually indicates a problem with the parking brake cables, linkage, or the rear brake components that the system relies on. In some cases, the lever, pedal, or electronic actuator may also be at fault.

Common causes of a parking brake that won’t engage

• Broken, stretched, or disconnected parking brake cables
• Worn rear brake shoes or pads
• Faulty parking brake lever, pedal, or electronic actuator
• Seized or damaged calipers (disc brakes)
• Improperly adjusted or misaligned brake components

Why do you need to fix this problem quickly?

If the parking brake won’t engage, your vehicle may roll away when parked, creating a serious safety hazard. It also removes a vital backup braking system in case of hydraulic brake failure.

How do you know when to get it checked?

You should book an inspection if:

• The parking brake lever or pedal moves freely without resistance
• The car rolls even when the parking brake is applied
• You hear grinding, scraping, or clicking noises when trying to engage the brake
• The electronic parking brake warning light flashes or shows an error
• You notice reduced braking performance at the rear wheels

What happens during an assessment?

A mechanic will:

1. Inspect the parking brake lever, pedal, or electronic actuator
2. Check the parking brake cables for damage, stretch, or disconnection
3. Inspect rear brake pads, shoes, drums, or calipers
4. Test and adjust the parking brake mechanism
5. Recommend cable, component, or brake system replacement if required

How much does it cost to fix?

Minor adjustments may cost $100–$200. Parking brake cable replacement typically costs $250–$600. If rear brake components or an electronic actuator need replacement, costs may range from $400–$1,200+.

Is it unsafe to drive with a parking brake that won’t engage?

Yes. Without a functioning parking brake, your car may roll unexpectedly when parked and you lose a vital emergency braking system. The issue should be repaired immediately for safety.