Why cars fail their MOT on suspension (and what it costs)

Suspension is the second most common MOT failure at 8.65 percent of cars, and unlike lights it can get expensive. What fails and how to price it.

MOT DATA · 4 min read

The second most common failure

Suspension faults appear on 8.65 percent of car MOTs, making them the second most common failure overall. Unlike lights, suspension is where costs start to climb, because it is labour heavy and often involves parts that only fail after real wear.

What actually fails

The usual suspects are worn bushes, tired shock absorbers, corroded or snapped coil springs, and worn ball joints and drop links. Broken coil springs are extremely common on British roads thanks to potholes and salt, and a knackered shock fails on a leak or on the bounce test.

What it costs

A drop link is cheap, often under twenty pounds a side plus a little labour. Springs and shocks are mid-range, typically fifty to a hundred and fifty pounds a corner in parts, more on performance or air-suspension cars. The real cost is the labour and the fact that failures often come in axle pairs, since you replace shocks and springs in sets.

The salvage angle

Suspension is a category where a cheap MOT failure can quietly become a big bill, because one failed item on the sheet often hints at more. On an accident salvage, a hard impact can bend arms, hubs and subframes that cost far more than a worn bush. Price suspension conservatively and let the Analyzer apply a proper allowance rather than assuming it is just a drop link.