Sway Bar Brackets

A sway bar bracket clamps the sway bar to the chassis, holding it in position while letting it twist.

It is a simple part doing a job with no tolerance for slop, and when it loosens or cracks the whole sway bar stops working properly.

What a Sway Bar Bracket Does

The sway bar needs two things at once. It has to be held firmly to the chassis so it cannot move fore, aft or sideways, and it has to be free to rotate along its own axis as the suspension works.

A sway bar mount is what achieves both at once. The bracket is a steel or alloy strap bolting to the chassis rail or crossmember, and it captures a bush that the bar rotates inside.

The bar twists within that bush thousands of times on any drive, which is why the bush wears and the bracket takes constant load trying to pull it away from the chassis.

Each bar uses two brackets, one each side, positioned where the bar passes under the vehicle. Front and rear bars each have their own pair and the dimensions differ.

When a sway bar bracket is doing its job, the bar reacts the instant one wheel loads differently to the other. When the bracket or its bush has play, the bar moves before it starts to resist, and vehicle sway increases before anything happens to control it.

The D Bush and the Bracket That Holds It

The two parts work as a pair and are usually discussed together.

A sway bar D bush, sometimes listed as a sway bar mount bracket bush, is the split rubber or polyurethane bush that wraps around the bar, named for its shape with a flat bottom and a curved top. Sway bar D bushes sit inside the bracket, and the bracket clamps them against the mounting surface.

That arrangement means a worn bush and a worn bracket produce similar symptoms. The bar is no longer held tightly, and it moves within the mount instead of twisting against it.

Front sway bar bushes wear fastest, since the front bar is thicker, more heavily loaded and closer to the road spray. Rear sway bar bushes typically last considerably longer.

Polyurethane sway bar mount bushes hold their shape far better than rubber under load, which keeps the bar's response sharper. The trade-off is that they need grease at fitting and can transmit slightly more noise if run dry.

Sway bar link bushes are a different item again, sitting at the ends of the links rather than at the bar's chassis mounts.

Offset Sway Bar Brackets for Lifted Vehicles

Lifted 4WDs are the most common reason a bracket gets replaced, and it is worth understanding before buying a lift.

Raising a vehicle moves the suspension through a different part of its arc, and the sway bar ends up sitting closer to the front struts than it was designed to. On plenty of 4WDs the bar then contacts or rubs the strut body at full lock or under compression.

Offset sway bar brackets relocate the bar forward or down to restore that clearance. They bolt into the original mounting points and reposition the bar rather than modifying anything.

The alternative people reach for is stacking spacer plates under the standard bracket, which works after a fashion and leaves the fastener loading well away from where it was designed to be. A purpose made offset bracket is stronger and considerably neater.

Most offset brackets accept the original sway bar bushes, so the bush is not an additional purchase unless it has worn out anyway.

If a lift kit has gone on and there is now a rub mark on the strut, this is the fix.

Pressed Steel and Billet Aluminium Brackets

Factory sway bar brackets are pressed steel, which is cheap to produce and adequate for standard loads.

Pressed steel flexes under load, and on a vehicle running a thicker aftermarket bar or carrying weight, that flex means the bar is not held as precisely as it should be. Pressed brackets also corrode from the inside where they contact the bush.

Billet aluminium brackets are machined from solid rather than pressed, which makes them considerably stiffer and removes the flex. They are the common choice where a bracket is being replaced for performance reasons rather than because the original failed.

Anodised finishes resist corrosion better than painted steel, which matters on a component sitting directly in the spray from the front wheels.

For a standard vehicle with an intact original bracket, a replacement bush is usually all that is needed. The bracket upgrade earns its place on a lifted vehicle, a heavier bar, or one where the original has cracked.

Universal Sway Bar Brackets

Universal sway bar brackets cover applications where no direct replacement is listed, which is common on older vehicles and anything modified.

They suit a custom sway bar installation, a vehicle where the original mounting has rusted away, or a chassis that has been modified and needs the bar relocated.

Fitment comes down to the bar diameter the bush is sized for and the bolt spacing at the mounting face, so both need measuring before ordering.

A universal bracket requires the mounting surface to be sound. Where a chassis mounting point has corroded, that needs addressing before any bracket goes back on, since the bracket is only as good as what it bolts to.

Signs a Sway Bar Bracket or Mount Needs Replacing

• A clunk or knock from under the front of the vehicle over bumps
• Sway bar bushes noise, usually a squeak or groan at low speed over driveways
• Visible movement of the bar within its mount when levered
• The bush visibly split, flattened or squeezed out past the bracket edge
• A bracket that is bent, cracked or has elongated bolt holes
• Rust around the mounting point or on the bracket itself
• Bolts that will not hold torque between services
• A rub mark on the strut where the bar has contacted it
• The vehicle feeling vague on turn in with no fault found elsewhere

The squeak is the most common and the easiest to dismiss, and it is a dry bush wearing itself against the bar every kilometre.

Why a Cracked Sway Bar Bracket Gets Missed

Worth knowing, because the failure is rarely obvious from underneath.

A bracket cracks at the bend where the strap meets the mounting face, which is the highest stressed point and usually the part sitting against the chassis where nobody can see it.

The symptom is a knock that comes and goes rather than one that is always there, because the crack opens under load and closes again when the load comes off. People chase it as a loose link or a worn shock for months.

Elongated bolt holes are the other sign and they are easier to spot. Once a bolt hole has gone oval, the bracket moves before the fastener stops it, and retorquing achieves nothing because the clamping surface is no longer flat.

Corrosion is what drives both of those failures. Water sits between the bracket and the chassis, the steel thins, and what was adequate becomes marginal.

Check the mounting face on the chassis as well as the bracket. A sound bracket bolted to a corroded mount is not a repair.

Sizing Sway Bar Brackets and Bushes

Three figures decide whether a bracket will fit.

Bar diameter is the critical one, since the bush has to match the bar it wraps. Common sizes run from around 16mm through to 30mm and beyond, and a bush even a millimetre out will either not fit or will not clamp properly.

Bolt spacing at the mounting face has to match the chassis holes, measured centre to centre.

Bracket height and offset determine where the bar sits once mounted, which is what changes between a standard and an offset design.

Measure the bar itself with calipers rather than relying on a specification, since aftermarket bars frequently differ from the original diameter.

Greasing and Torquing Sway Bar Brackets at Ride Height

Grease the bush at fitting on polyurethane, using a silicone or PTFE based lubricant rather than a petroleum based grease, which degrades polyurethane over time.

Fit the bush with its split facing the direction the manufacturer specifies, since a split positioned into the load path opens up and lets the bar move.

Torque the bracket bolts with the vehicle at ride height on its wheels, not with the suspension hanging, so the bar sits where it will actually run.

Replace both sides of the vehicle at the same time. A new bracket and bush on one side against a worn pair on the other leaves the bar reacting unevenly across the vehicle.

Check the sway bar links while access is available, since they wear on a similar timeline and the symptoms overlap.

Fulcrum has been working on suspension since 1976, across 16 Service Centres and 200+ authorised workshops nationwide.

Find Sway Bar Brackets for Your Vehicle

Select your vehicle to see the sway bar brackets and sway bar mounts available for it, in standard, offset and universal designs. Measure your bar diameter and bolt spacing before ordering, particularly if an aftermarket bar is fitted. Warranty and a fitment guarantee come with everything we sell, supported by workshops in every state.