Towing a vehicle with its emergency brake engaged causes severe damage to braking components, tires, and the drivetrain, creating significant safety hazards.
Life throws unexpected curveballs, and sometimes your vehicle needs a tow. It’s a stressful situation, and things can get overlooked in the rush.
One critical detail often forgotten is the emergency brake, also known as the parking brake. Engaging it during a tow can turn a bad day into a much worse one for your vehicle’s health.
The Basics: Understanding Your Emergency Brake
Your emergency brake is a crucial safety feature, distinct from your primary service brakes. It’s designed to hold your vehicle stationary, especially on inclines, providing a failsafe.
Most vehicles use a cable-actuated system connected to the rear wheels. This physically locks the wheels or applies pressure to the brake drums or calipers.
Newer vehicles often feature electronic parking brakes (EPB). These systems use electric motors to engage the brake calipers, offering a push-button operation.
Regardless of type, its function is the same: to prevent unintended movement when parked. It’s like a boat’s anchor; it’s meant to keep you still, not to be dragged.
It’s never designed to withstand the forces of being dragged while a vehicle is in motion.
Can You Tow A Car With Emergency Brake On? The Mechanical Fallout
Attempting to tow a car with its emergency brake engaged creates immediate and severe mechanical stress. The consequences ripple through multiple systems.
Brake System Damage
The most immediate impact is on the brake components themselves. The emergency brake forces the wheels to resist rotation, generating immense friction and heat.
- Brake Shoes/Pads: These components will wear down rapidly, burn, or even disintegrate. The friction material can separate from its backing.
- Rotors/Drums: Extreme heat causes warping, glazing, and deep scoring on the brake surfaces. This compromises future braking effectiveness.
- Brake Cables: Constant tension and dragging can stretch the emergency brake cables, making them less effective or causing them to snap entirely.
- Calipers/Wheel Cylinders: The forced engagement can overheat and damage the internal seals and pistons, leading to leaks or seized components.
This damage often requires extensive and costly repairs, far beyond simply releasing the brake.
Tire and Wheel Damage
Tires are not designed to be dragged sideways or to endure prolonged skidding. When the emergency brake is on, the tires are essentially being forced to slide.
- Flat Spots: The most common outcome is severe flat spots on the tires, particularly if the tow occurs for a significant distance. This ruins tire balance and ride quality.
- Sidewall Stress: The tires endure unnatural stress on their sidewalls and internal structure, potentially leading to blowouts later.
- Wheel Bearings: Excessive heat from the brakes transfers to the wheel hubs and bearings. This can reduce their lifespan or cause immediate failure, leading to dangerous wheel wobble.
Drivetrain and Transmission Strain
Even if the emergency brake primarily affects the rear wheels, the entire drivetrain experiences undue stress, especially on front-wheel-drive (FWD) or all-wheel-drive (AWD) vehicles.
Forcing the wheels to drag puts a heavy load on axles, differentials, and even the transmission.
- Differential: In vehicles with a rear differential, the forced resistance puts strain on its gears and bearings, leading to premature wear.
- Axles: Axle shafts can twist or bend under the immense rotational resistance.
- Transmission: If the vehicle is towed with the drive wheels on the ground and the emergency brake engaged, the transmission can suffer. Automatic transmissions are particularly vulnerable to internal damage and fluid overheating when components are forced to move without proper lubrication or cooling.
Here’s a quick look at how different components suffer:
| Component | Impact from Towing with E-Brake On |
|---|---|
| Brake Pads/Shoes | Rapid wear, burning, material separation |
| Rotors/Drums | Warping, glazing, deep scoring |
| Tires | Flat spots, structural damage, blowouts |
| Wheel Bearings | Overheating, premature failure |
| Drivetrain | Excessive strain, potential twisting/bending |
Safety Hazards and Legal Repercussions
Beyond mechanical damage, towing a vehicle with its emergency brake engaged creates significant safety risks for everyone on the road. It also opens the door to financial and legal issues.
On-Road Dangers
A vehicle being dragged with its brakes locked becomes unpredictable. It’s not just about the towed car; it affects the tow vehicle too.
- Loss of Control: The towed vehicle can sway erratically, making it difficult for the tow driver to maintain control, especially during turns or braking.
- Fire Hazard: The extreme friction and heat generated by the dragging brakes can ignite brake fluid, grease, or even the tires. This is a serious fire risk.
- Component Failure: A tire blowout or a seized wheel bearing during towing can cause the towed vehicle to detach or swerve violently, endangering other motorists.
The National Highway Traffic Safety Administration (NHTSA) and Department of Transportation (DOT) emphasize proper towing procedures to prevent such hazards.
Legal and Financial Liabilities
When a towing incident causes damage or an accident, liability becomes a significant concern. Improper towing can void insurance coverage or lead to costly disputes.
- Insurance Claims: Your insurance company may deny claims for damage caused by improper towing, considering it negligence.
- Repair Costs: You will be responsible for the extensive repair costs to your vehicle. These can quickly add up to thousands of dollars.
- Third-Party Damage: If the improperly towed vehicle causes an accident, you could be held liable for damages to other vehicles or property.
Always ensure the tow operator is aware of the vehicle’s condition and that all proper procedures are followed.
What If It Happens? Recognizing the Signs and Acting Fast
Accidents happen, and sometimes the emergency brake might be overlooked. Recognizing the signs quickly can mitigate further damage.
Recognizing the Problem
During the initial moments of a tow, pay close attention to any unusual indicators.
- Burning Smell: A distinct odor of burning rubber or hot metal is a clear red flag. This indicates extreme friction and overheating.
- Smoke from Wheels: Visible smoke emanating from the rear wheels (or any wheels connected to the emergency brake) means immediate trouble.
- Difficulty for Tow Truck: The tow truck driver might notice unusual resistance or a struggle to move the vehicle smoothly.
- Squealing or Grinding Noises: Loud, persistent noises from the wheels indicate metal-on-metal contact or severe friction.
Immediate Actions
If you suspect the emergency brake is on during a tow, immediate and calm action is essential.
- Alert the Tow Driver: Signal the tow truck driver to pull over safely and immediately.
- Disengage the Brake: Once stopped, ensure the emergency brake is fully released. For electronic parking brakes, follow the vehicle’s specific procedure.
- Inspect for Damage: Carefully examine the affected wheels, tires, and brake components for visible damage, scorching, or leaks.
- Assess Further Towing: If significant damage is evident, especially to tires or axles, it might be safer to request a flatbed tow, even if a wheel-lift was initially used.
Do not resume towing until the issue is resolved and any immediate safety concerns are addressed.
Best Practices for Safe Towing
Preventing damage during a tow is always better than dealing with the aftermath. A few simple checks make a huge difference.
Pre-Towing Checklist
Before any wheel leaves the ground, confirm these critical points. This applies whether you’re using a professional service or towing a friend’s car.
- Confirm Emergency Brake Off: This is paramount. Double-check the lever or button. For electronic systems, ensure the indicator light is off.
- Transmission in Neutral: For manual transmission vehicles, place the shifter in neutral. For automatics, ensure it’s in park before releasing the brake, then shift to neutral for towing.
- Steering Wheel Unlocked: If the vehicle is being towed with its front wheels on the ground, the steering wheel must be unlocked to allow for turns.
- Proper Towing Equipment: Always use equipment rated for the vehicle’s weight. A flatbed tow is generally the safest method for most vehicles.
Understanding Towing Methods
Different towing methods have different implications for your vehicle’s components, especially the drive wheels.
The type of vehicle (FWD, RWD, AWD) determines the safest towing approach. The DMV often provides guidelines for safe towing practices.
Here’s a look at common towing methods:
| Towing Method | Emergency Brake Impact | Ideal Use |
|---|---|---|
| Flatbed Tow | No impact (all wheels off ground) | Any vehicle, especially AWD/4WD |
| Wheel-Lift Tow | High impact if engaged on ground wheels | FWD (lift front), RWD (lift rear) |
| Tow Dolly | High impact if engaged on ground wheels | FWD (drive wheels on dolly) |
Always ensure the drive wheels are either lifted off the ground or the drivetrain is properly disengaged. For AWD or 4WD vehicles, a flatbed tow is almost always the only safe option to prevent transmission and differential damage, regardless of the emergency brake.
Can You Tow A Car With Emergency Brake On? — FAQs
What does an emergency brake actually do mechanically?
The emergency brake, or parking brake, physically locks or applies friction to the rear wheels, or sometimes all four, to prevent the vehicle from rolling. It uses a cable system or electric motors to engage dedicated brake shoes or the main calipers. This creates a mechanical hold, independent of the hydraulic service brake system.
Can towing with the emergency brake on cause a fire?
Yes, it absolutely can. The extreme friction generated by the dragging brake components creates intense heat. This heat can ignite flammable materials such as brake fluid, grease, or even the rubber of the tires. It’s a serious safety hazard that can quickly escalate.
How can I tell if the emergency brake is on during a tow?
You might notice several signs. These include a burning smell, smoke coming from the wheels, the tow truck struggling significantly to move the vehicle, or loud squealing and grinding noises. If you observe any of these, immediately alert the tow operator to stop and investigate.
Will my insurance cover damage from improper towing with the emergency brake on?
It’s unlikely your standard insurance policy will cover damage caused by towing with the emergency brake engaged. Insurance companies often consider this negligence or improper operation. You would likely be responsible for the full cost of repairs, which can be substantial.
What is the safest way to tow a car to avoid emergency brake issues?
The safest way is to use a flatbed tow truck, as all four wheels are lifted completely off the ground. If a flatbed isn’t an option, ensure the emergency brake is fully disengaged, and for wheel-lift or dolly towing, make sure the vehicle’s drive wheels are off the ground or the drivetrain is properly disconnected.
Certification: BSc in Mechanical Engineering
Education: Mechanical engineer
Lives In: 539 W Commerce St, Dallas, TX 75208, USA
Md Amir is an auto mechanic student and writer with over half a decade of experience in the automotive field. He has worked with top automotive brands such as Lexus, Quantum, and also owns two automotive blogs autocarneed.com and taxiwiz.com.