| Component | Platforms and models | Symptom | Typical fix |
|---|---|---|---|
| Lower arm rear console bush | PQ35: Golf Mk5/Mk6, A3 8P, Octavia Mk2 | Clonk on braking, vague turn-in | Bushes or complete arms |
| Lower arm bushes | MQB: Golf Mk7/Mk8, A3 8V, Leon 5F | Knock, wander at speed | Arms plus alignment |
| Upper arm ball joints | Audi A4/A5 B8, A6 C7 | Creak over speed bumps | Upper arm pairs |
| Front arm kit wear | Audi A4 B6/B7, A6 C5 | Loose steering, uneven tyre wear | Multi-arm kit, alignment |
| Rear trailing arm bushes | Golf Mk5 to Mk8, Octavia, Leon | Rear clonk, axle shuffle | Bonded bushes pressed in |
| Rear toe arm bushes | MQB and PQ35 multi-link rear | Inner edge rear tyre wear | Toe arms, rear alignment |
| Integral ball joint wear | Polo, Fabia, Ibiza, A1 | Clonk, MOT failure on play | Complete arm renewal |
The classic signs are a clonk from the front on braking or over potholes, steering that feels vague or wanders at motorway speed, uneven front tyre wear and a car that no longer settles cleanly after a bump. On the ramp the wear is usually obvious: cracked or separated rubber in the bush, or play in a loaded ball joint.
A soft bush is a comfort and handling problem before it is a safety one, but a badly worn ball joint is different: if it separates, the wheel loses location entirely. Because the two often wear together and sound similar, we treat any front-end clonk as worth an early inspection rather than something to monitor for months.
Arms set the wheel's position, so new arms mean new geometry whether you asked for it or not. Without alignment the car can pull, wear tyres rapidly and feel worse than before the repair. On VAG cars the steering angle sensor also needs a basic setting once the geometry is corrected, otherwise the ESP system works from a false reference.
Usually, yes. Both sides have carried the same loads over the same roads, so when one arm's bush has failed its twin is close behind, and matched fresh bushes keep the car symmetrical. There are exceptions, such as one-sided impact damage on an otherwise healthy car, and we will always tell you honestly which situation yours is.
It depends on the design. Where a bush presses out cleanly and the ball joint is healthy, a bush-only repair saves money and we do it in-house. Where the ball joint is integral and part-worn, or pressing risks distorting the arm, a complete arm with new bush and joint fitted is better value over time. We quote the sensible option for your car.
Audi's multi-link front suspension uses four arms per corner on models such as the A4 and A6, each with its own joints and bushes. They wear at similar rates, and labour overlaps heavily because the suspension is apart either way. Replacing them as a kit costs less than doing them one at a time over successive visits, which is why arm kits are the standard approach.
Yes, once wear passes the tester's threshold. Deteriorated bushes with visible cracking or movement and any ball joint with excessive play are failures, and slightly worn ones are advisories. Plenty of cars pass with bushes that are clearly on the way out though, so a clean MOT is not proof the suspension is healthy, just that it is legal today.