Is it OK to drive with a broken control arm?
Not recommended. A broken control arm compromises steering and suspension, and driving can be dangerous. The safest option is to tow the vehicle to a repair shop.
Control arms are a key part of the suspension that connect the wheel hub to the vehicle frame, helping maintain alignment and stable handling. When a control arm is damaged—through impact, wear, or rust—it can cause sudden changes in wheel alignment, steering drift, uneven tire wear, and even loss of control, especially at speed or when hitting potholes. This article explains why driving with a broken control arm is risky and what to do about it.
What a control arm does
The control arm (or its arm assembly) acts as a pivot point between the chassis and the wheel hub. It keeps the wheel’s motion controlled as the suspension reacts to bumps, while bushings or ball joints absorb forces and maintain alignment. A bent, cracked, or detached control arm disrupts camber and toe, which can destabilize steering and tire contact with the road.
Why a broken control arm is dangerous
Potential risks while driving
A broken control arm can lead to sudden steering instability, shifting wheel alignment, and compromised braking effectiveness. In severe cases, the wheel can fold inward or detach from the vehicle, causing a loss of control. Hitting a pothole or curb with a damaged arm can amplify damage to other suspension components and tires, increasing the risk of a crash.
Symptoms and signs
These warning signs may indicate a damaged control arm or related suspension parts. If you notice more than one, stop driving and have the car inspected as soon as possible.
- Uneven tire wear or unusual scuffing on the tires
- Clunking, knocking, or grinding noises from the front or rear suspension
- The vehicle pulls to one side or the steering feels loose or vague
- Visible damage or bending of the control arm or associated components
- Vibration in the steering wheel, especially at low speeds or over bumps
- Difficulty returning the steering wheel to center or erratic handling
If you notice several of these signs, stop driving as safely as you can and arrange roadside assistance or a tow to a repair facility. Continuing to drive can worsen damage and increase crash risk.
What to do if you suspect a broken control arm
Follow these safety steps to minimize risk until a professional can inspect and repair the vehicle.
- Pull over to a safe location as soon as you can do so without endangering yourself or others.
- Turn on hazard lights and set up any warning devices if you’re on a roadway.
- Do not attempt to drive long distances. If you must move the vehicle, keep speeds very low and avoid rough roads or potholes, but generally don’t drive with a suspected broken control arm.
- Call roadside assistance or arrange a tow to a qualified repair shop.
- Have the suspension system inspected by a licensed mechanic. Replace any damaged arms, bushings, or joints as needed and perform a wheel alignment.
These steps prioritize safety and help limit further damage to the vehicle’s suspension and steering components.
Repair options and costs
Repair typically involves replacing the damaged control arm and, depending on the design, possibly the associated ball joint or bushings. The wheel alignment should be checked and corrected after replacement. Costs vary by vehicle, region, and whether additional parts are damaged. In the United States, expect parts to cost roughly $100–$350 for a single control arm (some vehicles require two arms or aftermarket options), plus labor that can range from $150–$400. An alignment may add $75–$150. For luxury brands or all-wheel-drive systems, prices can be higher, with total repair often ranging from around $700 to $1,200 or more. Always obtain a written estimate before service and have the shop inspect related components for collateral damage to tires, rims, and steering gear.
Preventive maintenance and safety tips
Good maintenance and careful driving can reduce the risk of suspension damage and extend the life of steering components. Consider these practices.
- Have the suspension and alignment checked regularly, especially after impacts, pothole hits, or accidents
- Promptly replace worn control arms, bushings, or ball joints when wear or damage is detected
- Drive cautiously to avoid potholes, speed bumps, and curbs whenever possible
- Maintain proper tire pressure and inspect tires for unusual wear
- Schedule wheel alignments after suspension work or major repairs
Routine maintenance helps prevent unexpected failures and keeps steering predictable.
Summary
A broken control arm is a serious safety issue. Driving with it compromises steering, handling, and tire contact with the road, increasing the risk of a crash. If you suspect damage, do not drive the vehicle; have it towed to a qualified repair shop for inspection and repair. Timely replacement and proper alignment are essential to restore safe operation and prevent further damage.
Can you legally drive with a broken arm?
There are no laws prohibiting driving with a cast, sling, or similar device. Some individuals may have only one arm due to genetic or medical issues and are legally permitted to drive.
How much would it cost to fix a control arm?
The average cost to replace a control arm is between $400 and $1,000, but it can range from under $300 to over $1,700, depending on the vehicle, parts, and labor rates. This total typically includes parts and labor for the control arm replacement, and an alignment is also necessary afterward, adding another $100 or more to the final price.
Cost breakdown
- Parts: Control arm parts can cost from about $80 for a basic model to over $400 for a specialty vehicle. Some complex control arm assemblies, especially for high-end cars, can be much more expensive.
- Labor: The labor cost is often the largest portion of the expense. It typically ranges from $150 to $300 or more, depending on the shop and how long the repair takes.
- Alignment: An alignment is crucial after a control arm replacement to ensure proper wheel alignment, and this typically costs $100 and up.
Factors that influence the total cost
- Vehicle Make and Model: The cost of parts and labor varies significantly between different makes and models. A basic control arm for a common car will be cheaper than a specialized or heavy-duty one for a truck or luxury vehicle.
- Part vs. Labor: The parts themselves are often only a portion of the total cost. Labor is a major factor, with some jobs requiring two to three hours per arm.
- Type of Control Arm: Some control arms are simpler, while others are part of a larger assembly that includes ball joints and other components.
- Location: Labor rates can vary based on your geographic location.
How to save money
- DIY: If you have the right tools and skills, you can save on labor costs by replacing the control arm yourself.
- Shop Around: Get quotes from multiple shops, including independent mechanics, to find a competitive price for both parts and labor.
- Consider Aftermarket Parts: Some aftermarket parts may be more affordable than OEM (original equipment manufacturer) parts, but it's important to check the quality of the aftermarket part.
What happens if the suspension breaks while driving?
If a car's suspension breaks, the result is a loss of control over the vehicle, poor handling, and a significant safety risk, making it dangerous to drive. You may experience a loss of steering, excessive bouncing, or a wheel could even detach. The car could become unstable, especially when cornering or braking, leading to accidents.
What happens
- Loss of control: With a broken suspension component like a control arm or strut, the vehicle's steering and stability are compromised.
- Wheel detachment: In severe cases, such as a broken control arm, the wheel can detach from the vehicle, leading to an immediate and catastrophic loss of control.
- Compromised handling: The car will become very difficult to handle, making it hard to steer, especially during turns or emergency maneuvers.
- Braking issues: You may experience increased stopping distances and instability, particularly if the suspension problem affects wheel alignment or affects brake components.
- Excessive bouncing: The vehicle will bounce uncontrollably, making for an extremely uncomfortable and unsafe ride.
- Other damage: The failure can also damage other components, such as the brakes, steering system, and frame, leading to much more expensive repairs.
This video explains what happens when a control arm breaks while driving: 58sAutomotive affairsYouTube · Dec 14, 2024
What you should do
- Pull over immediately: Safely pull to the side of the road as soon as you notice a suspension failure.
- Do not drive further: Driving with a broken suspension is extremely dangerous and should be avoided.
- Call for a tow: Arrange to have the vehicle towed to a mechanic for a proper inspection and repair.
- Drive slowly and carefully for short distances if absolutely necessary: If you must move the vehicle a short distance, drive at a very low speed and be prepared for the worst. Avoid hard braking or acceleration.
What happens if you drive with a broken control arm?
Driving with a broken control arm is extremely dangerous and can cause loss of control, steering issues, and in the worst-case scenario, wheel separation, leading to a severe accident. It is crucial to have the vehicle towed to a mechanic immediately, as driving further could cause more damage and endanger yourself and others.
Dangers of driving with a broken control arm
This video explains the dangers of driving with a broken control arm: 58sAutomotive affairsYouTube · Dec 14, 2024
- Loss of control: A broken control arm compromises your car's ability to be steered, making it difficult to maintain a straight line or turn safely.
- Wheel separation: In a complete break, the wheel could detach from the vehicle, causing a sudden loss of control and a high risk of a severe accident.
- Steering and braking problems: You may experience a shaky steering wheel, difficulty maintaining a straight path, and increased braking distance because the suspension can no longer properly absorb road impacts.
- Further damage: Continued driving will cause additional damage to other suspension components, which could lead to more expensive repairs.
- Safety hazards: Any sudden maneuver, like braking or turning, could be catastrophic.
What to do if you suspect a broken control arm
This video shows the symptoms of a bad control arm: 58sFixITYouTube · Jul 26, 2024
- Stop driving immediately: Pull over to a safe location as soon as possible.
- Do not continue to drive: Do not attempt to drive the vehicle, even a short distance.
- Call for a tow truck: Arrange to have your vehicle towed to a qualified mechanic for a professional inspection and repair.
