MOT advisory explained
“Suspension arm ball joint has slight play”
A pass today, but one of the few advisories that fails next year more often than one time in seven. Here is what the tester found, what it costs, and how long it usually lasts.
The ball joint is the swivel at the outer end of a suspension arm. It carries the weight of that corner and lets the wheel steer. The tester levered it and found movement that should not be there, though not yet enough to fail.
Play in a ball joint never settles down. It only grows, and 16.0% of these advisories fail on the same joint at the next test. Treat it as a repair to book, not one to watch.
Per corner, fitted. On most cars the joint is part of the arm, so the arm is replaced. Alignment afterwards adds £40–£80.
Don’t confuse this with “suspension arm pin or bush worn”. Same arm, different part, less than half the failure rate. The line on your certificate tells you which one you have.
A “suspension arm ball joint has slight play” advisory means the swivel joint connecting a suspension arm to the wheel hub has measurable movement that is still inside MOT limits, so the car passes. Replacing the arm, which on most cars includes the joint, costs £140–£280 per corner at an independent garage. According to DVSA MOT data analysed by PriceMyRepair, 16.0% of 2.3 million such advisories followed to the next test failed on the same joint.
What the tester actually found
A ball and a socket. The joint is a steel ball held in a greased socket and sealed by a rubber boot. It lets the hub pivot as you steer and rise and fall over bumps. When the socket wears, the ball can shift inside it. That shift is the play.
How it is checked. With the wheel raised or sitting on turn plates, the tester levers between the arm and the hub and watches the joint. Any visible movement between ball and socket is recorded. Slight movement is an advisory. Movement the tester judges excessive is a failure.
Why the boot matters. Most joints fail because the boot splits first, the grease washes out and grit gets in. A split boot is reported on its own line, covered on the ball joint dust cover page. If you have both lines on one certificate, the joint is further along than the play alone suggests.
Will it fail next year?
This can be measured rather than guessed. The DVSA test record lets each advisory be followed to the same car’s next MOT, and for this wording that happened 2,285,155 times.
| What happened at the next test | Share |
|---|---|
| Failed on the same component | 16.0% |
| Failed on anything under defect 5.3.4 | 20.6% |
| Same advisory recorded again | 17.3% |
According to DVSA MOT data analysed by PriceMyRepair: 2,285,155 advisories followed to the same vehicle’s next test. Rows can overlap.
That puts it near the top of the common advisories. Among the suspension and steering wordings below, only a track rod end with slight play turns into a failure more often, at 18.6%. A worn bush in the very same arm fails 7.4% of the time, so the ball joint wording carries 2.2 times the risk.
The second row matters as well. 20.6% of cars with this advisory fail the next test on some suspension pin, bush or joint, whether the advised one or a neighbour. Only 17.3% come back with the same advisory written down again, which is low. This is not an advisory that sits on a certificate for years: it gets fixed, or it fails.
| Advisory wording | Fails on same part | Advised again | Followed |
|---|---|---|---|
| Track rod end ball joint has slight play | 18.6% | 16.9% | 1,700,156 |
| Suspension arm ball joint has slight play | 16.0% | 17.3% | 2,285,155 |
| Anti-roll bar linkage ball joint has slight play | 10.0% | 17.1% | 2,098,185 |
| Shock absorbers has light misting of oil | 7.9% | 26.2% | 5,360,491 |
| Suspension arm pin or bush worn | 7.4% | 29.3% | 8,344,577 |
| Wheel bearing has slight play | 5.8% | 26.4% | 1,109,766 |
| Coil spring corroded | 5.0% | 39.1% | 4,780,118 |
Age pulls in two directions. The advisory gets steadily more common as cars get older, from 3.0 per 1,000 tests at 3–4 years to 23.9 at 20 years and over. The chance of it becoming a failure does not follow the same line. It peaks at 7–9 years, at 18.0%, and drops back on the oldest cars.
| Age of car | Per 1,000 tests | Fails on same part | Followed |
|---|---|---|---|
| 3–4 years | 3.0 | 9.8% | 84,633 |
| 5–6 years | 5.8 | 14.3% | 174,786 |
| 7–9 years | 11.0 | 18.0% | 463,762 |
| 10–12 years | 16.8 | 17.9% | 563,185 |
| 13–15 years | 21.1 | 16.6% | 492,171 |
| 16–19 years | 24.4 | 14.7% | 345,502 |
| 20 years and over | 23.9 | 11.0% | 129,606 |
The riskiest place to see this advisory is on a car in the middle of its life. Those cars tend to cover the most miles between tests, so a joint with slight play in one MOT has a full year of hard use before the next.
On cars of 20 years and over the rate falls to 11.0%. Older cars tend to do fewer miles, and the ones still on the road are the ones whose owners repair them.
On a young car the figure is lower, 9.8% at 3–4 years, but play in a joint that new is unusual. Ask whether the boot has split or the car has taken a kerb or pothole strike.
Exact wording on your certificate
The advisory and the failure share a defect code, because both describe the same joint. What changes is how much movement the tester found.
| Line on the certificate | Result | Code |
|---|---|---|
| Suspension arm ball joint has slight play | Advisory — pass | 5.3.4 (a) (i) |
| Suspension arm ball joint worn, but not excessively | Advisory — pass | 5.3.4 (a) (i) |
| Suspension arm ball joint excessively worn | Major — fail | 5.3.4 (a) (i) |
| Suspension arm ball joint likely to become detached | Dangerous — fail, do not drive | 5.3.4 (a) (ii) |
Testers add the position, and the positions show where the load is. Almost every instance is at the front, and where upper or lower is stated it is overwhelmingly the lower joint, the one that carries the weight of the car.
| Position written by the tester | Share of all instances |
|---|---|
| Offside front | 23% |
| Nearside front | 23% |
| Nearside front lower | 21% |
| Offside front lower | 20% |
| Nearside front upper | 2% |
| Offside front upper | 2% |
From 5,296,588 recorded instances. Testers can add their own note after the standard wording. The most common on this advisory: “both sides” (45,490), “rear arm” (42,777), “both” (40,129), “rear” (25,705), “front arm” (19,347), “front” (12,535), “bottom ball joint” (11,860), “both front” (8,088).
What it costs to fix
| Job | Price fitted | Notes |
|---|---|---|
| Complete arm with joint, one side | £140–£280 | The usual route, the joint comes with the arm |
| Both sides, same axle | £250–£480 | Cheaper than two separate visits |
| Alignment afterwards | £40–£80 | Needed, the joint sets the wheel’s position |
Independent garage prices, parts and labour. On some cars, mostly older designs, vans and 4x4s, the joint bolts or presses into the arm and can be bought on its own, which costs less than a full arm. Ask before you agree to the arm. Prices by model are on the suspension repair cost page.
Can I still drive with this advisory?
Book the repair within the next few months rather than leaving it to the next test. Stop driving and have it looked at sooner if you notice a clunk when turning or braking, steering that wanders, or a front tyre wearing on one edge.
The reason not to wait is what happens at the far end. A bush that wears out makes the car vague and noisy. A ball joint that wears out completely can pull apart, and the wheel folds under the car. That is rare and it is a long way from slight play, but it is why testers take this joint seriously and why the failure version includes a “dangerous” grade.
Enter your reg. We’ll pull every advisory from every test, show whether this joint has been flagged before, and price the work for your car.
Which cars get this advisory most?
Across all vehicles this advisory appears on 13.1 of every 1,000 tests. On some models it is several times more common.
| Model | Per 1,000 tests | Vs all cars | Tests |
|---|---|---|---|
| Mercedes-Benz Sprinter | 84 | 6.5× | 2,101,182 |
| Volkswagen Crafter | 62 | 4.8× | 585,956 |
| Nissan Navara | 62 | 4.8× | 712,261 |
| Renault Master | 60 | 4.6× | 760,734 |
| Mitsubishi Shogun | 51 | 3.9× | 420,039 |
| Vauxhall Movano | 51 | 3.9× | 544,309 |
| Mercedes-Benz GLC | 50 | 3.9× | 486,472 |
| Renault Megane | 41 | 3.1× | 1,634,315 |
| Renault Scenic | 39 | 3.0× | 600,691 |
| BMW X5 | 39 | 3.0× | 869,410 |
Model families are grouped by the first word of the DVSA model name, so “Transit” covers every Transit variant. Only models with at least 60,000 tests are ranked.
The list is mostly weight. Large vans, pickups and heavy 4x4s put far more load through the front lower joints than a hatchback does, and the Mercedes-Benz Sprinter sees this advisory 6.5 times as often as the average vehicle. The Renault Megane and Scenic are the exception: ordinary family cars that appear here because of their front suspension design rather than their weight.
If your car is on the list, the advisory is normal wear for the model and parts are easy to find. If it is not, and the car is young, ask the garage what caused it.
What to do next
- Find out which joint. Upper or lower, nearside or offside. The certificate often says. If it does not, the tester will remember or can show you on the ramp.
- Ask if the joint is sold separately. If it is, you may not need the whole arm. If it is not, the arm is the correct repair and not an upsell.
- Look at the other side. “Both sides” is the most common note testers add to this advisory. Both joints have done the same miles, and doing the pair in one visit means one alignment instead of two.
- Get the alignment done. A new joint changes where the wheel sits. Skipping the alignment is how a correct repair still wears out a front tyre.
Suspension arm ball joint advisory FAQ
Is slight play in a suspension arm ball joint dangerous?
Not at the advisory stage. The tester judged the movement to be within limits, which is why the car passed. It becomes dangerous when the wear is excessive, because a ball joint that separates lets the wheel fold under the car. The advisory is the warning that comes well before that.
Will a ball joint with slight play fail the next MOT?
More often than most advisories. According to DVSA MOT data analysed by PriceMyRepair, 16.0% of 2.3 million such advisories failed on the same joint at the next test, and 20.6% failed on some suspension pin, bush or joint. Only 17.3% were simply advised again.
How long can I drive with slight play in a ball joint?
Usually months, not weeks, but plan the repair rather than waiting for the next MOT. Play in a ball joint only increases. Have it checked straight away if you hear a clunk when turning or braking or the steering starts to wander.
How much does it cost to fix a suspension arm ball joint?
On most cars the joint is part of the arm, so the repair is a complete arm at £140–£280 per side fitted at an independent garage, plus £40–£80 for wheel alignment. Where the joint is sold separately the job costs less. These are estimates and final quotes come from garages.
Can the ball joint be replaced without the whole arm?
On some cars, yes. Older designs, vans and 4x4s often have a joint that bolts or presses into the arm. On most modern cars the joint is built into the arm and the two are replaced together.
Which cars get this advisory most often?
Heavy vehicles. The Mercedes-Benz Sprinter gets it 6.5 times as often as the average vehicle, followed by the Volkswagen Crafter, Nissan Navara and Renault Master. Among ordinary cars the Renault Megane stands out.
How these figures were calculated. According to DVSA MOT data analysed by PriceMyRepair, from the DVSA anonymised MOT test results (Open Government Licence v3.0): 350,943,111 tests. This advisory was recorded 5,296,588 times; 2,285,155 of those were followed to the same vehicle’s next test between 180 and 730 days later. “Fails on the same part” means a failure at that next test under the same defect code and naming the same component, on either side of the vehicle. Testers do not always name a component the same way twice, so the figure is a floor. Method and how to cite.