Ball Joint Buying Guide
Last updated: 24 April 2026
Ball joints are pivot points in the suspension system that allow the control arm and steering knuckle to move in multiple directions. Worn ball joints cause clunking, uneven tyre wear, and are a serious MOT failure point due to safety implications. At CarParts247 we stock ball joints from Lemförder, TRW, and Meyle.
Ball joint wear signs
Ball joints are loaded by vehicle weight and road impacts. As the ball wears in its socket, play develops, compromising steering precision and suspension integrity.
- Clunking or knocking over bumps — play in the ball joint
- Steering wander and imprecise feel — loaded ball joint no longer locating precisely
- Uneven tyre wear — camber angle changes as the joint wears
- Visible grease leak from the ball joint boot — boot has split
- MOT failure for excessive play — checked with a pry bar or by rocking the wheel
Press-fit vs bolt-on replacement
Ball joints are either pressed into the control arm or bolted on. Press-fit joints require a ball joint press tool. Some designs require control arm replacement as a complete assembly.
- Press-fit: requires a ball joint press (can be hired from motor factors)
- Bolt-on: simpler replacement, typically 3-4 bolts
- Some control arms have integrated ball joints — the whole arm must be replaced
- Always replace the pinch bolt and nut — they are stretch-fit and single-use
- Get a four-wheel alignment after ball joint replacement
Category page
- Browse matching parts
Clunking suspension and inspection failures — press-fit vs bolt-on ball joints, wear signs, and replacement advice.
Related guides
- Anti-Roll Bar Bush Buying Guide
Worn anti-roll bar bushes cause clunks and body roll — polyurethane vs rubber, sizing, and fitting guide.
- Anti-Roll Bar Link Buying Guide
Knocking over bumps? Anti-roll bar drop link wear symptoms, replacement tips, and how they affect handling.
- Boot and Bonnet Gas Strut Buying Guide
Tailgate or bonnet not staying up? How to measure force rating, strut length, and ball-end fittings — and why cheap gas struts fail quickly.
- Control Arms Guide
What control arms do, symptoms of worn bushings and ball joints, and when to replace them.
Frequently Asked Questions
How do I check ball joints?
Jack up the wheel, grip the tyre at 12 and 6 o'clock, and rock it. Clunking or visible movement at the ball joint indicates wear. A mechanic can use a pry bar for a more definitive test.
Is a worn ball joint dangerous?
Yes. A severely worn ball joint can separate, causing the wheel to collapse outward. This is why ball joint condition is a serious MOT test item.
Should I replace ball joints in pairs?
It's good practice to replace both sides if they have similar mileage, as they experience the same loads. At minimum, inspect the other side when replacing one.
Related Guides
Worn anti-roll bar bushes cause clunks and body roll — polyurethane vs rubber, sizing, and fitting guide.
Anti-Roll Bar Link Buying GuideKnocking over bumps? Anti-roll bar drop link wear symptoms, replacement tips, and how they affect handling.
Boot and Bonnet Gas Strut Buying GuideTailgate or bonnet not staying up? How to measure force rating, strut length, and ball-end fittings — and why cheap gas struts fail quickly.
Control Arms GuideWhat control arms do, symptoms of worn bushings and ball joints, and when to replace them.
Ready to find the right part?
Browse spare parts