Should you replace control arms in pairs? In most cases, the answer is a definitive yes. While it is physically possible to replace just one, replacing control arms in pairs ensures symmetrical handling and prevents uneven tire wear. Since both arms are subject to the same road conditions and mileage, once one fails, the other is usually not far behind. Moreover, replacing them simultaneously saves you from paying for a professional wheel alignment twice—a mandatory step after any control arm service.
Why Replace Control Arms in Pairs
The control arm plays an important role in your vehicle’s suspension system. It helps keep the wheels aligned with the vehicle’s frame, ensuring a smooth ride and stable handling. Over time, control arms wear out due to constant stress and movement. Replacing them in pairs makes sense for several reasons.
- Balanced Suspension
Replacing control arms in pairs ensures that both sides of the vehicle are functioning at the same level. If you replace just one, the suspension system can become unbalanced. This could affect your vehicle’s handling, leading to a rougher ride and reduced stability. A balanced suspension system keeps your vehicle aligned and ensures the tires wear evenly.
- Wear and Tear
Control arms typically wear out at the same rate. The stresses placed on the suspension system are often symmetrical, so when one control arm starts to fail, the other isn’t far behind. By replacing them in pairs, you prevent any imbalance that could cause one side of your suspension to work harder than the other.
- Prevent Uneven Handling
If you only replace one control arm, the new part might not match the wear and performance of the old one. This can lead to uneven handling, which might cause your vehicle to pull to one side, vibrate, or feel unstable, especially when cornering or braking.
For wholesalers and shop owners, recommending pairs reduces ‘comeback’ complaints, where a customer returns a month later because the other side started clunking. Selling pairs ensures higher customer satisfaction and doubles your revenue per order.
Want to learn more about when control arms should be replaced? Check out our guide on When Should You Replace a Control Arm?.
When Is It Okay to Replace Only One Control Arm
In some cases, it may be acceptable to replace just one control arm, but this should only happen when the other side is still in good condition. Here are a few scenarios where replacing only one control arm might make sense:
| Scenario | Replace in Pairs? | Reason |
| Normal Wear & Tear | Yes (Highly Recommended) | Symmetrical handling & alignment savings. |
| Accident/Pothole Damage | Possible to replace one | If the other side is relatively new/undamaged. |
| High Mileage (>80k miles) | Yes (Mandatory) | Bushings on both sides are likely degraded. |
| Fleet/B2B Maintenance | Yes | Minimizes vehicle downtime and ensures safety. |
1. Limited Damage
If one control arm is damaged while the other is still in good shape, it’s possible to replace just the damaged one. This could happen if you hit a pothole, curb, or other obstacle that damages one side of the suspension while leaving the other intact.
2. Cost Considerations
For some, replacing just one control arm is a more cost-effective solution. If the other control arm is still in good condition, you may decide that replacing just the damaged part is sufficient for now. However, keep in mind that this might lead to uneven tire wear and other suspension issues in the long run.
3. Specific Vehicle Design
In some vehicles, the suspension components on either side may be independent, and the wear on one side may not affect the other. For instance, if one control arm’s bushing is worn out, but the other side is still in excellent condition, replacing just the damaged side might be the best option.
Unsure about the lifespan of your control arm? Learn more in our article on Control Arm Lifespan.
How to Identify When Control Arms Need Replacement
Before deciding whether to replace your control arms in pairs or just one side, it’s important to know how to spot the signs of wear. Here are a few common symptoms that indicate it’s time for replacement:
| Symptom | Possible Control Arm Issue | Next Steps |
|---|---|---|
| Clunking noise | Worn ball joints or bushings | Inspect the control arm and joints for wear |
| Steering pulls to one side | Uneven control arm wear | Replace both control arms to restore balance |
| Vibrations in the steering wheel | Faulty or damaged control arm bushings | Inspect suspension for damage and misalignment |
| Uneven tire wear | Misalignment due to worn control arms | Realign your wheels and replace control arms |
If any of these symptoms are present, it’s time to have your control arms inspected by a professional.
How Much Does Replacing Control Arms in Pairs Cost
Replacing control arms is an important repair, and while it may seem like an expensive job, it’s essential for the safety and functionality of your vehicle. The cost of replacing control arms in pairs can vary, but here’s a general breakdown:
- Parts: A single control arm can cost $50 to $200, depending on the vehicle and brand. When replacing in pairs, expect to pay anywhere from $100 to $400 for parts.
- Labor: Labor charges typically range from $75 to $150 per hour, and the replacement process can take 2–3 hours. Therefore, labor costs for replacing control arms can range from $150 to $450.
- Total Cost: On average, replacing control arms in pairs can cost between $300 and $850, including both parts and labor.
While this might sound like a significant investment, remember that replacing control arms can prevent other costly suspension problems down the road.
Will You Need an Alignment After Replacing Control Arms in Pairs
Yes, you will need a wheel alignment after replacing control arms in pairs. Replacing suspension components like control arms can affect wheel alignment. A proper alignment ensures your car handles correctly, your tires wear evenly, and you maintain optimal vehicle performance.
Tip: If you’re unsure about the alignment process, check out our article on Do You Need an Alignment After Control Arm Replacement?.
How to Choose a Reliable Control Arm Supplier
When replacing control arms, it’s crucial to choose parts that meet Original Equipment (OE) standards. These parts are designed to provide the same performance, safety, and durability as the parts originally installed in your vehicle.
Look for suppliers that offer:
- OE-standard parts for long-lasting performance
- Customizable options, including packaging and material grades
- Fast shipping to get your parts when you need them
At GDST AUTO PARTS, we offer factory-direct control arms that are precision-engineered for durability.
Need high-quality control arms for your vehicles? Contact GDST Now for custom solutions and bulk orders.
Conclusion
In most cases, replacing control arms in pairs is the best solution. It ensures balanced suspension, better handling, and even tire wear. While you might be able to replace just one if the other is still in good condition, doing so may lead to uneven performance, extra wear on other suspension components, and possible handling issues. For a Complete Overview of Suspension Control Arms, Check Our Complete Control Arm Guide.
If you’re replacing control arms, ensure you choose high-quality OE-standard parts to keep your vehicle running smoothly and safely. GDST offers top-tier control arms, designed for durability and backed by expert support.
Partner with a Trusted Suspension Expert
Looking for reliable control arms or bulk solutions? GDST provides factory-direct parts, fast shipping, and custom options to meet all your suspension needs. Partner with us for top-quality products and professional service.
Related Control Arm Guides
- Function of a Control Arm in a Car
- Where Is the Control Arm Located
- When Should You Replace a Control Arm
- How Much Does Control Arm Replacement Cost
- How to Replace a Control Arm
- Lower Control Arm Replacement Cost
- Upper Control Arm Replacement Cost
- Is It Hard to Replace a Control Arm
FAQ
Yes, even one arm changes the geometry.
No, usually it’s only about 50-70% more because the tools are already set up.
Mention that GDST supports both, but pairs are packaged for convenience.
Yes, a bad control arm can affect your vehicle’s alignment. If the control arm is worn or damaged, it can lead to misalignment of the wheels, which causes uneven tire wear, poor handling, and even affects your steering.
Control arms generally last anywhere from 75,000 to 100,000 miles, depending on factors like road conditions, driving habits, and maintenance. However, if you start noticing signs of wear earlier, it’s best to get them inspected by a professional.
Yes, when replacing control arms, it’s a good idea to replace the bushings as well, especially if they’re worn out. Bushings help reduce vibrations and noise in the suspension, and new bushings will help the new control arms perform optimally.
