Brakes

Electric parking brake won't release

On cars with a button instead of a lever, the electric parking brake relies on a small motor at each rear caliper; when it won't release, it's usually a low battery, a fault in that motor, or a system needing a manual reset.

Difficulty
Moderate
Time
30–60 minutes to diagnose
DIY cost
$0–$150
Pro cost
$150–$500

Symptoms

  • Pressing the release button does nothing, or the dash shows a fault message
  • Car feels like it's dragging or won't move
  • Possible battery voltage issue if this happens along with other electrical symptoms

Likely causes

  • CommonLow car battery voltageElectric parking brakes need adequate voltage to run their motors; a weak battery can prevent release.
  • CommonFaulty parking brake motor at one or both rear calipersThese small motors can wear out or fail over time.
  • PossibleSystem fault requiring a manual reset procedureMany manufacturers have a specific button/pedal sequence for emergencies.
  • Less commonCorroded or damaged caliper motor wiringMore likely in high-mileage vehicles or areas with road salt.

What to do

  1. Check the dash for any specific fault message or warning related to the parking brake.
  2. Have the battery tested if it's more than a few years old, since low voltage is a common and simple cause.
  3. Check your owner's manual for an emergency manual release procedure specific to your model.
  4. Try starting the car (to ensure full electrical power) before attempting to release the parking brake again.
  5. Do not force the car to move if the rear wheels are locked, since this can damage the parking brake mechanism.
  6. Have a mechanic diagnose and replace the specific motor, wiring, or module causing the fault.

Tools and parts

Electric parking brake actuator/motorSearch: “electric parking brake actuator for your car make and model”
Car batterySearch: “group size car battery for your model”

When to call a pro

See a mechanic or dealer if the manual release procedure doesn't work or the battery tests fine, since a motor or module likely needs replacement.

Safety

Use caution

Don't force the car to move with a locked electric parking brake; this can damage the mechanism and potentially cause loss of control.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.