Suspension parts wear gradually, and one side of an axle can fail before the other. Even so, shock absorbers and coil springs are often considered as axle pairs because left-to-right differences can affect ride height, damping and handling.
Why are shock absorbers often replaced in pairs?
A new shock absorber can control movement differently from an old worn unit on the opposite side. Replacing both sides of the same axle can help keep damping characteristics more consistent.
Do coil springs need replacing in pairs?
If one spring has broken or sagged, the spring on the other side may have experienced similar age and use. Pair replacement is often considered to help maintain consistent ride height and spring behaviour, although the correct repair should follow the vehicle manufacturer’s guidance and the condition of the components.
What symptoms can worn shocks cause?
- Excessive bouncing after bumps.
- Poor body control.
- Oil leakage from the damper.
- Uneven tyre wear where suspension condition is a contributing factor.
- Knocking caused by related mounts or bushes.
What symptoms can a damaged spring cause?
A broken coil can cause the vehicle to sit lower on one side, produce knocking or metallic noises, or leave a visible broken section near the spring seat. Corrosion can also weaken springs over time.
Should top mounts and bearings be checked too?
Yes. When a strut assembly is removed, the top mount, bearing, dust boot and bump stop are commonly inspected because worn supporting components can create noise or shorten the life of the repair.
How do I order the correct suspension parts?
Check the exact axle, left/right position, suspension type and vehicle specification. Springs can vary by engine weight, body style and factory equipment, while shocks can vary by sports or standard suspension.
Browse our suspension parts and read our suspension knocking guide if you are tracing a noise.