Ben Spencer | Marketing & Sales Manager
CCM
Most drivers know that driving without a valid MOT is illegal. But here’s something that might surprise you: it could also invalidate your car insurance — even if the accident wasn’t your fault.
A recent real-world case has brought this issue sharply into focus, and it’s a story every driver in the UK needs to hear.
The £120,000 Lesson
A motorist in Cardiff found herself in an incredibly difficult position after her Ferrari — worth £120,000 — was involved in a collision in August 2023. Her insurer, Admiral, refused to pay out on her claim. The reason? Her car had failed its MOT just five days before the accident.
The vehicle had been identified as having a major defect: fluid leaking from the rear shock absorber. This was classed as a safety-critical fault requiring immediate repair. Rather than getting the car fixed and retested, the vehicle was driven a further 128 miles before the crash occurred.
Admiral’s position was unequivocal: the car was not roadworthy at the time of the collision. The Financial Ombudsman Service reviewed the case and sided with the insurer. The claim was denied in full.
What Does a Failed MOT Actually Mean?
An MOT failure is not just a bureaucratic inconvenience — it is a formal assessment that your vehicle does not meet the minimum safety standards required for UK roads. Faults are categorised as follows:
- DANGEROUS | an immediate risk to road safety; the vehicle should not be driven.
- MAJOR | a significant risk that must be repaired before the vehicle is driven (other than to a garage for repair).
- MINOR (Advisory) | should be monitored and repaired soon.
In the case above, the shock absorber leak was classed as a Major defect — meaning the car legally should not have been used on public roads, except to travel directly to a repair facility.
How Does This Affect Your Insurance?
Insurance policies are built on a principle of good faith. When you take out a policy, you are declaring that your vehicle is roadworthy and legally compliant. Driving a car with a known, unresolved major fault fundamentally undermines that declaration.
Insurers can — and do — use an invalid MOT or unresolved safety defect as grounds to void a claim. This can apply even in cases where you were not at fault for the accident itself. In the example above, the driver was injured and left unable to work, yet still received nothing from her insurer.
It is worth noting that driving without a valid MOT also risks a fine of up to £1,000, and your vehicle could be seized by police.
What You Should Do
The good news is that this is entirely avoidable. Here’s what we recommend:
Keep track of your MOT expiry date
Don’t wait until it lapses — book your test in advance.
If your vehicle fails, act immediately
Major faults must be repaired before you drive the car, except to take it directly to a garage.
Don’t ignore advisories
While they won’t cause an immediate failure, they indicate developing issues that could become dangerous or costly if left unattended.
Use a trusted garage
Choosing a reliable, accredited MOT centre means you can trust the result and get repairs carried out correctly.
Book Your MOT with CCM Garages
At CCM, we make keeping your vehicle legal and roadworthy straightforward. Our experienced technicians carry out MOT tests to the highest standard, and if repairs are needed, we’ll explain everything clearly before any work begins. Don’t risk your insurance — or your safety. Get in touch with us today to book your MOT.
Your MOT certificate is more than a piece of paper. It is proof that your vehicle has been assessed and deemed safe for the road — and that proof could be the difference between a valid insurance claim and a very costly lesson.
