Skip the auto shop - Our mechanics make house calls

Q: Why would my passenger side drum brake engage when I'm not touching the brake pedal and then release?

asked by on

When driving my passenger side drum brake will engage by itself slow the car down and then release and sometimes it catches again.

My car has 102000 miles.
My car has an automatic transmission.

Do any warning lights come on when this happens? If you are having an issue with the ABS system (which is kind of unlikely), or an issue with the brake sensors the vehicle will likely set codes which can be read in a scan.

This could also be from a bad yaw sensor. The yaw sensor detects certain angles of tilt during a turn. If it is calibrated incorrectly, it will cause the brakes to engage to correct the tilt. The yaw sensor will need to be replaced if it is found to be faulty. You will also want to check for any kind of mechanical issues. This would include any loose retaining bolts or guides, rusted out or damaged components, or anything bent or out of shape. If you would like to have a professional inspect the brake system, a certified technician from YourMechanic can come to your car’s location to have this taken care of.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Why would my passenger side drum brake engage when I'm not touching the brake pedal and then release?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 1999 Toyota corolla steering wheel problem.

Billing question sent to CS for the cost to diagnose and repair the spiral cable in the steering column on a 1999 Toyota Corolla.

Q: Can't pressurize the hydraulics

Most likely, the master cylinder has gone bad as well. 70,000 miles is a long time ago. The only other thing that you could try is either pressure, or vacuum bleeding the clutch system, with one of the many different...

Q: Squealing and clicking noise from back part of the car but only when moving forward

Hello, thank you for writing in. The first step is to definitively determine if the noise happens when the vehicle is moving (and it is brake or wheel related), or if the noise happens constantly when the vehicle is running....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.