Most Common MOT Failures in the UK & When to Scrap (2026)
Updated for 2026 · UK MOT Guide
Failing an MOT can be stressful — especially when the repair bill lands.
Every year, millions of cars fail their MOT in the UK. Some failures are cheap fixes. Others are a warning sign that the car has reached the end of its economical life.
This guide explains the most common MOT failures, typical repair costs, and when scrapping your car is the smarter financial decision.
If your MOT bill already feels too high, you can check your scrap value here before committing to repairs.
1. Corrosion & Structural Rust
One of the most common reasons older cars fail their MOT.
Repair costs: £250–£1,500+
Rust spreads. Even if repaired once, it often reappears.
When rust affects sills, chassis or suspension mounts, scrapping is usually the sensible choice.
2. Suspension Failures
Common issues include:
- Broken springs
- Leaking shocks
- Worn bushes
Repair costs: £300–£900
Multiple suspension failures often indicate ongoing expense.
3. Brake System Issues
Failures may involve:
- Brake pipes
- Discs and calipers
- Handbrake systems
Repair costs: £250–£800
If combined with rust or suspension issues, scrapping may save money.
4. Engine Warning Lights & Emissions
Modern MOT tests are strict on emissions.
Repair costs: £200–£2,000+
Persistent engine warnings often lead to repeat MOT failures.
5. Steering & Wheel Bearings
Repair costs: £200–£600
On high-mileage vehicles, these often fail alongside other components.
When Should You Scrap After an MOT Failure?
If MOT repair costs exceed around 50–60% of the car’s value, scrapping is usually cheaper than repairing.
Repair vs Scrap: The Simple Rule
- Low-cost, single issue → repair
- Multiple major failures → scrap
- Rust + mechanical issues → scrap
- High mileage + big MOT bill → scrap
For a deeper breakdown, see our repair vs scrap guide.
Why Scrap After an MOT Failure?
- No repair bills
- No repeat MOT stress
- Instant payment
- Free collection
- DVLA handled
Ready to Scrap Your MOT Failure?
Questions? Speak to our team.
