A sway bar link connects your suspension to the sway bar and keeps your car stable during turns

A sway bar link (also called an anti-roll bar link or stabilizer link) is a metal rod with ball joints on each end that connects your vehicle's sway bar to the suspension. When you turn a corner, your car's body wants to lean outward. The sway bar resists that lean by transferring weight from the outside wheels to the inside wheels. The sway bar link is the physical connection that makes this transfer happen.

Without sway bar links, your sway bar would just sit there doing nothing. The links are what actually pull and push on the suspension to keep the car level. When a sway bar link wears out or breaks, you lose that stability, and your car will feel loose and tippy during turns.

Key Takeaways

  • A sway bar link is a rod with ball joints that connects the sway bar to your suspension and keeps your car stable in turns.
  • Most vehicles have two sway bar links per sway bar — one on the left side and one on the right side.
  • Worn sway bar links cause clunking noises, excessive body roll during turns, and uneven tire wear.
  • A sway bar link typically costs between $150 and $400 per side to replace, depending on your vehicle and whether you do it yourself.

Where the sway bar link sits in your suspension

The sway bar itself is a horizontal metal rod that runs side to side under your car, usually near the front wheels and sometimes near the rear wheels too. The sway bar link connects this rod to a part of your suspension — usually the lower control arm or the strut assembly, depending on your car's design.

One end of the link bolts or clips to the sway bar. The other end connects to the suspension. Both ends have ball joints that allow the link to move up and down as your suspension compresses and extends, while still transferring the side-to-side forces that keep your car from rolling.

Most cars have two sway bar links on the front suspension (one left, one right) and sometimes two more on the rear. Larger vehicles and trucks are more likely to have rear sway bar links because they carry more weight and need extra stability.

What happens when a sway bar link wears out

Sway bar links wear out because the ball joints inside them eventually lose their grease and start to bind or rattle. Road salt, water, and dirt get inside the joint and cause corrosion. The rubber bushings that surround the joint can also crack and separate.

The first sign of a worn sway bar link is usually a clunking or rattling noise from under the car when you drive over bumps or turn sharply. You might also notice that your car leans more than it used to during turns, or that the steering feels less responsive. In some cases, the link can break completely, which will make the clunking much louder and the car feel unstable.

A broken sway bar link can also cause uneven tire wear because the suspension is no longer being controlled properly. If you ignore the problem, you may eventually damage other suspension parts like the struts or control arms.

How to tell if your sway bar link needs replacement

The most reliable way to check a sway bar link is to have a mechanic put your car on a lift and inspect it by hand. They will grab the link and try to move it side to side. If there is any play or movement in the joint, the link is worn and should be replaced.

You can also do a basic check yourself if you are comfortable getting under a car. With the vehicle on a lift or safely supported by jack stands, grab the sway bar link near the ball joints and try to wiggle it. If it moves more than a tiny bit, or if you hear a clicking sound when you move it, the joint is worn.

Listen for clunking noises when you drive over speed bumps or potholes, and pay attention to how your car feels during sharp turns. If the car feels loose or rolls more than it used to, and you hear noise from the suspension, a worn sway bar link is a likely culprit.

Replacing a sway bar link yourself versus taking it to a shop

Replacing a sway bar link is a moderate difficulty job that many DIY mechanics can handle with basic tools. You will need a jack, jack stands, a socket set, and possibly a ball joint separator tool. The job usually takes 30 minutes to an hour per side once you have the car safely lifted.

The hardest part is often getting the old link out, especially if it has been on the car for many years and is corroded. You may need to explore penetrating oil and let it soak before you can loosen the bolts. Once the old link is out, the new one usually goes in easily.

If you take your car to a shop, expect to pay between $150 and $400 per side, depending on your vehicle and your location. This includes the part and labor. If you buy the part yourself and do the work, you will typically pay $30 to $100 for the link, depending on whether you buy an OEM part or an aftermarket one.

OEM versus aftermarket sway bar links

An OEM (original equipment manufacturer) sway bar link is made by the same company that made your car. An aftermarket link is made by a different company. OEM links are usually more expensive but are may provide to fit and perform exactly as the manufacturer intended.

Aftermarket links are cheaper and often work just fine, but quality varies. Some aftermarket links use cheaper ball joints that wear out faster. Others are made to the same standard as OEM parts and last just as long. Read reviews from other owners of your vehicle before buying an aftermarket link.

For most vehicles, a quality aftermarket sway bar link will serve you well and save you money. If you want the assurance of an OEM part and do not mind paying more, that is also a solid choice.

Frequently Asked Questions

Can I drive with a broken sway bar link?

You can drive short distances, but it is not safe for regular use. A broken link means your car will roll excessively in turns and feel unstable. You will also hear a loud clunking noise. Have it replaced as soon as you can.

How long do sway bar links usually last?

Sway bar links typically last between 50,000 and 100,000 miles, depending on road conditions and driving habits. Rough roads, potholes, and salt exposure speed up wear. Some links last longer, and some wear out sooner.

Will a worn sway bar link cause my car to fail an inspection?

It depends on your state's inspection rules. Some states check suspension components closely and will fail a car with a clunking sway bar link. Others do not. Ask your mechanic whether your link is bad enough to cause an inspection failure.

Do I need to replace both sway bar links at the same time?

Not necessarily. If only one side is worn, you can replace just that one. However, if both sides are old and one is already failing, replacing both at the same time may save you money on labor and prevent a second failure soon after.

What is the difference between a sway bar link and a sway bar bushing?

A sway bar link is the rod that connects the sway bar to the suspension. A sway bar bushing is the rubber piece that sits where the sway bar itself mounts to the frame. They are different parts and wear independently.