• 1strut mount
• 2spring
• 3wheel
• 4shock absorber
• 5control arm
• 6ball joint

Suspension knocks and creaks

56 guides in this section

Suspension wears out gradually and almost always warns you with a noise long before it becomes dangerous. The trouble is that a knock over bumps sounds the same whether it comes from cheap anti-roll bar links or from a ball joint, and a ball joint that fails at speed is a safety matter.

The section is organised by the character of the sound and the conditions it appears in: frequent knocking on small ripples, single thumps in potholes, creaking when the car rocks, a knock that reaches the steering wheel. Alongside them are the signs of wear for each part and checks you can do in a car park without a lift.

A practical order: pin down the character of the sound on the symptom page with the diagnosis tree, then open the article about the specific part — the signs, the risks and what the repair involves are there.

Where the noise comes from

suspension, around the wheel

Narrow the sound down by questions

An interactive diagnosis tree: a few questions and the list of causes gets much shorter.

• Knocking in the suspension
• Knocking over bumps
• Rattling under the car
• Clicking when steering
• Humming when turning

All articles in this section

• A dull knock from the front over potholes What a dull knock from the front over potholes means: which suspension parts sound like that, how to separate the dangerous causes from the tolerable ones.
• A knock after replacing shock absorbers Why a knock appeared after new dampers: torque mistakes, old mounts and bump stops, a faulty part. How to find the cause and who pays to fix it.
• A knock after suspension work: who is to blame A knock appeared after suspension work: a fitting mistake, a faulty part or a neighbouring component? How to separate the three versions calmly.
• A knock felt in the wheel on rough roads Where a knock felt through the steering wheel comes from: the rack, track rod ends, tie rods or the anti-roll bar. Simple checks without a lift.
• A knock in the door over bumps The door knocks over bumps: the window regulator, the check strap, the latch — or the suspension after all. How to localise it in one drive.
• A knock when steering on the move What knocks when you turn the wheel while driving: CV joint, ball joint, strut top mount or the rack. How to separate the causes by sound.
• A knock when steering while parked Knocking, crunching or clicking when you turn the wheel with the car parked: top mounts, track rod ends, the rack, the power steering — how to tell them apart.
• A knock: ball joint or bush — how to tell A suspension knock over bumps: how to tell a worn ball joint from a worn bush by the character of the sound, simple tests and a check on a lift.
• A knock: steering rack or track rod ends A knock felt through the wheel over bumps comes from both the steering rack and the track rod ends. How to separate them with simple checks.
• A noisy strut top mount bearing: symptoms Clicking and crunching as you turn the wheel parked, knocking over small potholes, heavy steering — how to spot a worn strut top mount bearing.
• A squeal when steering to full lock Why a car squeals when the wheel is turned to full lock: the belt, the power steering pump or a low fluid level. When it is normal and when not.
• A steering rack knock: adjust or replace When a knocking steering rack can simply be adjusted and when it needs a rebuild or replacement: the criteria, and the risk of over-tightening.
• A steering rack knock: how to identify it How to tell that the steering rack is knocking and not the ends or tie rods: the characteristic signs, a two-person test and what the repair depends on.
• Anti-roll bar links knocking: how to check Rattling over small bumps is the most common anti-roll bar link complaint. How to check them by hand in ten minutes and not overpay for new arms.
• Camry strut knock: the typical problem A Camry front strut knock over small bumps: why the dampers are not always to blame, how to check the mounts and links, and how the repair is decided.
• Can you drive with a knocking suspension Which knocking suspension parts you can drive with and which you cannot: anti-roll bar, dampers, bushes, ball joints. Judging urgency by the sound.
• Checking shock absorbers with the bounce test The bounce test step by step: how to push on the body, how to count the movements, what the test cannot show and when a proper rig is needed.
• Checking track rod ends for play How to find play in track rod ends yourself: the 3 and 9 o'clock grip, feeling the joint by hand, telling them from the rack, and what the repair needs.
• Clattering under the car over bumps Anti-roll bar links, the undertray, exhaust mountings: why something clatters under the car over bumps, how to find the source and when it is actually serious.
• Creaking when you rock the car Why the body creaks when rocked by hand and over undulations: anti-roll bar bushes, control arm bushes, strut top mounts. How to find the creaking point.
• Diagnosing a suspension by ear: the full checklist A step-by-step suspension check with no lift: the bounce test, small bumps, big bumps, steering while parked, a slalom. Plus a table of noises and parts.
• Finding a suspension knock without a lift A step-by-step plan for locating a suspension knock with no pit and no lift: the sound portrait, the bounce test, checks by hand and a controlled drive.
• Front control arm bush wear: the symptoms Dull thumps in potholes, steering that wanders and a car that follows ruts — the typical signs of worn control arm bushes, and how to check them.
• Front strut knock over small bumps A dry knock from the front struts on small bumps: how to tell the damper from the top mounts and the anti-roll bar, and which checks to do yourself.
• Front suspension knock over small bumps Why the front suspension knocks on small bumps specifically: anti-roll bar links, bushes, top mounts, track rod ends. How to narrow it down yourself.
• Haval Jolion suspension knock: what to check first A sensible order for checking a front suspension knock on a Haval Jolion: from anti-roll bar links to top mounts and control arm bushes.
• How dangerous a ball joint failure really is What physically happens when a ball joint pulls out of its seat, which noises warn you weeks in advance and how to judge whether you can still drive.
• How to check a ball joint yourself A step-by-step ball joint check: the bounce test, the 12–6 play test on a raised wheel, the brake-pedal trick and what a torn boot really means.
• How to tell your shock absorbers are dead Body wallowing, bottoming out over potholes, longer stopping distances and oil leaks — how to judge damper condition in a few minutes without a test rig.
• Hyundai Solaris steering rack knock Why a knock appears in the wheel of a Hyundai Solaris on small bumps, and how to tell the rack from the track rod ends and anti-roll bar links.
• Interior creaking over bumps Interior creaks over bumps: why the body flexes and provokes the sound, how to tell trim from suspension, and what you can fix yourself.
• Kia Rio steering rack knock: adjust or rebuild A Kia Rio steering rack knock over small bumps: why it appears, how to tell it from the anti-roll bar links, and when an adjustment is enough.
• Metallic clatter under the car over bumps Metallic clatter from underneath on bumps: undertray, heat shields, exhaust or anti-roll bar links. How to find the source in five minutes.
• Polo Sedan / Rapid rear beam knock Why a Polo Sedan or Rapid knocks at the rear: beam bushes, dampers, bump stops and fasteners. How to localise the source and what the repair depends on.
• Power steering whine when turning: causes Why hydraulic power steering whines in corners: fluid level, air in the system, the pump, the belt. How to tell normal from wear and what to check first.
• Rear suspension knock over bumps What knocks in the rear suspension over bumps: dampers, beam bushes, springs or luggage in the boot. Checks without a lift and how repairs are chosen.
• Sagging springs: the symptoms How to tell that springs have sagged: ride height measurements, how the car behaves, indirect signs. What sagging risks and what replacement involves.
• Signs of a faulty steering rack Knocking, play, notchy steering, leaks and pump whine — the signs of a faulty steering rack, how to check it and when adjustment can still save it.
• Signs of a worn ball joint Knocking over small bumps, creaking when steering, wheel play — how to recognise a worn ball joint, check it and how urgent the replacement is.
• Signs of an electric power steering fault How to recognise an electric power steering fault: heavy steering, uneven assistance, the EPS light, knocks and clicks. What to check before the workshop.
• Signs of worn anti-roll bar bushes How worn anti-roll bar bushes sound, how they differ from the links, how to check them yourself and what the replacement involves.
• Signs of worn anti-roll bar links How worn anti-roll bar links knock, how their sound differs from dampers and ball joints, simple checks and what the replacement involves.
• Signs of worn bump stops Dull thumps in potholes, crumbs in the strut tower, the suspension bottoming out: how to recognise worn bump stops and why they are replaced with dampers.
• Signs of worn shock absorbers Eight signs of worn dampers: floating, nose-diving, knocking, patchy tyre wear. How to check them yourself and what the replacement involves.
• Signs of worn strut top mount bearings Crunching and knocking as you turn the wheel, dull thumps over bumps — how to recognise worn strut top mount bearings and what decides the repair.
• Signs of worn suspension bushes How worn control arm bushes show themselves: knocking, creaking, the car pulling and uneven tyre wear. Simple checks and what the repair involves.
• Signs of worn suspension springs Sagging, body roll, bottoming out in potholes: how to tell that suspension springs are tired, how to check them without a lift and what replacement involves.
• Signs of worn tie rods How to recognise worn tie rods: knocking over small bumps, steering play, the car pulling. Checks you can do yourself and what the repair involves.
• Signs of worn track rod ends Knocking over small bumps, steering play, wandering in a straight line — how to recognise worn track rod ends and check them yourself.
• Steering wheel judder when braking Why the steering wheel shakes when you brake: uneven disc thickness, a sticking caliper, hub play. How to tell it apart from wheel vibration and what to do.
• Suspension creaking over bumps Why a suspension creaks over bumps: anti-roll bar bushes, control arm bushes, ball joints. When grease is enough and when replacement is needed.
• Suspension knock in cold weather Why the suspension knocks in frost and quietens once warm: stiffened rubber, thick damper oil, plastic. What is dangerous and what is not.
• Suspension knock over speed humps Why the suspension knocks over speed humps specifically, which parts are usually to blame and how to narrow the search without a lift.
• Vibration: wheel balance or suspension Vibration in the wheel and body comes from both wheel imbalance and worn suspension. How to separate the versions by speed and conditions.
• What driving with dead shock absorbers leads to Dead dampers lengthen your stopping distance, destroy the suspension and chew through tyres. What breaks next, how to spot it and what the repair involves.
• What happens if you never replace anti-roll bar links Where driving on worn anti-roll bar links leads: more body roll, a snapped link, wear on neighbouring parts. How long you can leave it and why waiting costs more.

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