Quick answer
Coil springs are part of the suspension system. If snapped, badly corroded or insecure, they can fail an MOT.
Broken springs are common MOT failures on older vehicles.
When a coil spring can fail MOT
Broken spring
Cracked or snapped coil.
Severe corrosion
Weakens the spring.
Incorrect seating
Not sitting correctly.
Ride height issue
Vehicle sits unevenly.
Sharp fracture
May damage tyre nearby.
Dangerous defect
Unsafe suspension condition.
Common symptoms
Knocking noises, uneven ride height, harsh suspension, tyre rubbing or poor handling can suggest spring problems.
What to check before MOT
1. Vehicle height
Check if one corner sits low.
2. Listen for knocks
Especially over bumps.
3. Inspect wheel arches
Look for broken coils if visible.
4. Repair early
Broken springs should be fixed promptly.