Parking Brake Guide: How It Works and Why You Should Use It Every Time

The parking brake is the most underused safety device on most vehicles. Many drivers only engage it when parked on a hill — but there are compelling reasons to use it every single time you park.

Parking Brake vs. Emergency Brake: What's the Difference?

The terms are often used interchangeably, though they describe different use cases. "Parking brake" describes normal use: locking the rear wheels when parked. "Emergency brake" reflects its secondary role as a backup stopping mechanism if the primary hydraulic system fails. On most vehicles, it's the same cable-operated or electronic mechanism.

How the Parking Brake Works

Traditional parking brakes use a steel cable connected to a hand lever or foot pedal. Pulling or pressing the control tensions the cable, which mechanically actuates the rear brakes independent of the hydraulic system. Electronic parking brakes (EPB) replace the cable with electric motors at the rear calipers, activated by a dashboard button.

Why You Should Use It Every Time You Park

• Reduces strain on the transmission: Without the parking brake, a vehicle in "Park" rests the full weight on a small transmission parking pawl — a tiny metal pin that can crack under load on slopes
• Prevents cable seizure: Parking brake cables not used regularly can seize from rust and corrosion, making them useless in an emergency
• Maintains brake adjustment: On drum-style rear brakes, the parking brake cable serves as the self-adjustment mechanism
• Backup in hydraulic failure: A properly maintained parking brake can slow a vehicle to a stop if hydraulic brakes fail

Testing and Maintaining Your Parking Brake

Test the parking brake monthly: engage it on a gentle slope and ensure the vehicle doesn't roll. If the handle or pedal travels further than normal before holding, the cable may need adjustment. Our service team inspects parking brake function and cable condition at every comprehensive service.