Used Control Arm: Bushing, Ball Joint or the Whole Arm?

By LiveAutoParts Team · Updated Sep 7, 2026 · 5 min read

Quick answer: A control arm can fail in three places — its bushings, its ball joint, or the arm itself — and the complete arm is usually the practical unit to buy, because pressing parts out of an old arm can cost more in labor than it saves. Get the corner inspected first: a loose ball joint is a safety failure, not a noise to live with. Review control-arm fitment or get a VIN-based quote.

Control arms connect your wheel hub and suspension to the frame, locating the wheel while letting it move up and down. Their bushings and ball joints wear over time, causing noise, sloppy handling and uneven tire wear. A used control arm — ideally a complete assembly with the ball joint and bushings — is an affordable repair.

Signs of a worn control arm

Clunking or knocking over bumps
Loose, wandering, or vague steering
Vibration through the steering wheel
Uneven or rapid tire wear
Visible cracked/torn bushings or a loose ball joint

What a used control arm costs

Used control arms are an inexpensive repair, and a complete assembly (arm + ball joint + bushings) saves the labor and special tools of pressing parts. Control arms are usually replaced in pairs (left and right) so handling stays balanced.

How to buy the right one

Match by VIN: upper vs. lower, front vs. rear, and trim/suspension package all affect fitment — search by VIN.
Check the ball joint and bushings for play, cracks, or tears.
Replace in pairs for balanced handling.
Get an alignment after installation.

Reading the symptom before you buy

A clunk or pop as you pull away or hit the brakes is characteristic of a worn bushing: the arm is no longer held firmly in its mount, so it shifts fore and aft under load. A sneakier version of the same fault: a shudder through the wheel under braking that gets blamed on warped rotors, when a worn front bushing or ball joint reproduces it exactly. If new rotors did not cure your brake shudder, have the front suspension checked before you buy more brake parts.

Confirming it is shop work. A technician levers between the arm and its chassis mount, watches for movement and cross-checks the alignment readings. Take a ball joint seriously while you wait: at worst the stud separates from the knuckle, the wheel folds under the car and steering is gone, which is why a joint with severe play should be trailered, not driven.

Bushings, ball joint, or the whole arm?

On paper, bushings alone are the cheap fix. In practice, pressing an old bushing or ball joint out and a new one in needs a hydraulic press and the right sleeves and can absorb as much shop time as fitting a complete arm — and some shops decline to press standalone ball joints at all. There is a limit to what an old arm is worth restoring: pressing new parts into eyelets in a corroded or fatigued arm can leave a loose press fit later.

That is why a complete used arm — arm, bushings and ball joint together — is often the sensible unit to quote. Tell us the vehicle and position and we will confirm whether the arm you are quoted includes the joint. If the noise turns out to be higher up, the strut guide covers mount-bearing noise, and a worn wheel hub sounds different again.

Two things that belong in the estimate

Alignment, first. A replacement arm never sits exactly where the old one did — there is tolerance in the mounting points and fasteners, and the old arm's aged bushings had shifted the settings anyway — so camber, caster and toe all move, and camber left off spec eats a tire edge. Second, how the bolts are tightened. Rubber suspension bushings must be final-torqued at ride height; done with the suspension hanging, the bushing is twisted away from its neutral point from day one, which shortens its life and can create the very clunks and creaks you just paid to fix. See how used-part pricing is built.

Find a used control arm

Review control-arm fitment or request a VIN-based quote so the correct side, configuration, condition, shipping, warranty, and final pricing can be confirmed before purchase.

Frequently Asked Questions

What are the symptoms of a bad control arm?

Clunking over bumps, loose or wandering steering, steering-wheel vibration, uneven tire wear, and visibly cracked bushings or a loose ball joint are common signs.

Should control arms be replaced in pairs?

Yes — replacing both sides keeps suspension and handling balanced. A complete assembly with the ball joint and bushings also saves labor.

Do I need an alignment after replacing a control arm?

Yes. Control arms set suspension geometry, so a wheel alignment afterward protects your tires and handling.

Should I replace just the bushings or the whole control arm?

Usually the whole arm. Pressing an old bushing or ball joint out and a new one in needs a hydraulic press and the correct sleeves and can absorb as much shop time as bolting on a complete arm — and some shops will not press standalone ball joints at all. There is also a limit to what an aged arm is worth rebuilding, because pressing new parts into corroded or fatigued eyelets can leave a loose press fit later. A complete used arm with bushings and ball joint already fitted is normally the practical unit to quote.

My brake shudder came back after new rotors — can a control arm cause that?

It can. A shudder felt through the steering wheel under braking is commonly blamed on warped rotors, but a worn front control-arm bushing or ball joint reproduces the same shudder under braking load. If fresh rotors did not fix it, have the front suspension inspected before buying more brake parts. A technician can lever between the arm and its chassis mount to check for movement and cross-check the alignment readings.

The clunk is still there after a new control arm — what else makes that noise?

Sway bar links are the usual next suspect. MOOG calls a metallic clunking or knocking sound over bumps or at higher speeds one of the most common signs of a bad sway bar link, alongside loose steering feel and excessive body roll. A worn ball joint gives a fainter, intermittent clunk that shows up over a bump or dip. Both are separate parts from the arm, so have the corner rechecked on a lift before buying another arm.

Do the control arm bolts have to be replaced, or can the old ones go back in?

Many of them are one-time-use. I-CAR describes a torque-to-yield bolt as a one-time-use fastener designed to stretch during torquing, lists suspension mounting locations among the common places they are used, and warns they cannot and should not be reused: they will not have the same clamping strength and may break or work loose. Have the installer check your vehicle's service manual before anything goes back in.

How do I know a used control arm's bushings aren't as worn as the ones I'm replacing?

Someone has to look, because rubber is a wear item and a donor arm is as old as the car it came off. MOOG notes that repeated stretching and compression can separate a vertical bushing's rubber from its housing or bolt sleeve in as little as 30,000 miles. Ask for photos of the bushings and boots, and have the shop lever the arm on the lift: an eighth of an inch or more of free play means the rubber bushing is finished.

Does my car even have an upper control arm, or just a lower one?

Not every car has one. MOOG explains that the upper control arm connects to the uppermost area of the front wheel and the lower one to the lowest, but on strut suspensions the strut becomes the upper control arm, so plenty of cars have only lower arms at the front. Upper, lower, front, rear and left or right are separate parts, so name the position when you request a quote.