In most cases, no—driving with a broken trailing arm is dangerous and can lead to a sudden loss of control. The safest option is to stop and have the vehicle towed to a repair facility.
Understanding what a trailing arm does
The trailing arm is a suspension link that connects the wheel hub to the vehicle's frame or subframe. It helps locate the wheel in fore-and-aft and lateral axes, maintain proper toe and camber, and absorb road shocks as the suspension moves. A broken arm can allow the wheel to move unpredictably, which compromises steering, braking, and overall handling, especially at speed or under load.
Why a broken trailing arm is dangerous
Because it physically anchors the wheel to the car in one or more planes, a failure can cause sudden misalignment, wheel wobble, or even wheel detachment from the suspension. That can translate into loss of steering control, tire damage or blowouts, increased stress on other suspension and steering parts, and potential damage to brake lines or the braking system. Driving with this kind of damage is unsafe and may be illegal in many places.
What to do right now
If you suspect the trailing arm is damaged, follow these steps to stay safe and get professional help as quickly as possible.
- Safely pull over to a secure location away from traffic as soon as you can.
- Turn on hazard lights, apply the parking brake, and avoid harsh steering or braking.
- Do not drive long distances or at highway speeds; arrange tow or roadside assistance to transport the car to a repair shop.
- Inspect only if it’s safe to do so from outside the vehicle; look for obvious signs of damage around the wheel and mounting points.
These steps help prevent further damage to the suspension, steering, or brakes and keep you safe while awaiting professional diagnosis and repair.
What to expect during repair
Repairing a broken trailing arm typically involves replacing the arm itself and inspecting related components. The exact procedure depends on the vehicle’s suspension layout and the extent of the damage.
- Comprehensive inspection to confirm the trailing arm is broken and to assess mounting points, bushings, and related parts.
- Replacement of the trailing arm assembly, and any damaged mounting hardware or bushings.
- Reassembly with proper torque and alignment checks; potential replacement of associated components if damaged (bearings, joints, or tie-rods).
- Wheel alignment, tire assessment, and road-test to verify handling and braking behavior.
- Note that additional repairs (such as brake lines, CV joints, or axle components) may be required if damaged.
Costs and duration vary by vehicle type, region, and whether additional parts must be replaced. A typical replacement may cost several hundred to over a thousand dollars, with higher-end or all-wheel-drive systems often costing more, plus labor time ranging from a few hours to a full day.
Summary
A broken trailing arm creates serious safety risks because it governs wheel positioning and load transfer. Do not drive the car; have it towed to a qualified shop for diagnosis and repair. Expect a replacement part, possible related component checks, and a wheel alignment as part of the process. Budget for parts, labor, and alignment, and prioritize safety above all else.
Is it safe to drive with a broken trailing arm?
Driving with damaged, bent, or cracked trailing arms is neither safe nor wise as it can lead to the separation of the rear axle(s). This may then cause further damage to surrounding components, which is why you should address trailing arm issues as soon as you spot the signs.
Is trailing arm suspension easy to repair?
Can I replace trailing arms myself? It's possible for experienced DIYers with proper supports, torque specs, and an alignment afterward. Many vehicles require pre-loading the suspension at ride height before final torque to avoid bushing preload damage.
How long can you not drive with a broken arm?
You'll need to check with your doctor to confirm if you are able to drive. If not, you'll want to know how long these restrictions will last. You'll also need to tell the DVLA if a broken limb means you're unable to drive for more than three months.
How much does it cost to repair a trailing arm?
The total cost for replacing a single trailing arm ranges from $300 to $800 per side, depending on your vehicle's design, age, and local labor rates. Parts alone typically run $80 to $250 for each arm, while labor generally falls between $150 and $400 per side.