MOT tests in the UK are governed by the Driver and Vehicle Standards Agency (DVSA). All MOT centres are required to follow the same official testing manual. This ensures a consistent approach to assessing whether vehicles meet minimum road safety and environmental standards. However, in practice, how these standards are applied can differ slightly between centres.

Why Do Standards Vary?

Even though guidelines are universal, several factors can cause testing standards to vary:

• Tester Experience – Some MOT testers are more thorough due to years of experience, while newer testers may interpret minor issues differently.
• Equipment Quality – Not all centres have the same level of up-to-date testing equipment, which can influence accuracy.
• Business Type – Independent garages, national chains, and local authority centres may have slightly different approaches to testing and reporting.
• Interpretation of Advisories – While dangerous and major faults are clear-cut, advisories can be subjective, leading to differences between centres.

Local Authority vs Independent vs Chain Centres

• Local Authority MOT Centres: Often seen as impartial since they don’t carry out repairs, meaning there’s no incentive to recommend unnecessary fixes.
• Independent Garages: Typically more flexible and customer-focused, but standards may vary based on the garage’s reputation and staff training.
• Chain Centres: Usually well-equipped and consistent, but may follow stricter interpretations to align with brand-wide policies.

How Drivers Can Protect Themselves

Since slight variations are possible, drivers can take steps to ensure fairness and transparency in their MOT:

• Check the MOT History: Use Check MOT to review a vehicle’s past test results and see if advisories or failures seem consistent.
• Choose Reputable Centres: Look for garages with good customer reviews and a proven track record.
• Understand the Rules: Familiarising yourself with MOT categories (dangerous, major, minor, advisory) helps you understand tester decisions.
• Get a Second Opinion: If you’re unsure about a result, you can always retest at a different authorised centre.

The Impact of Inconsistent Standards

Variations between centres don’t mean one is “right” and another “wrong” – all must follow DVSA rules. However, one garage may issue multiple advisories while another may consider the same issues minor. This is why comparing MOT histories is so valuable, especially when buying a used car.

FAQs

Are MOT centres allowed to have different standards?

No, all centres must follow DVSA rules, but interpretation of advisories can differ.

Do local authority centres fail fewer cars?

Not necessarily. They are impartial but must still apply the same standards as any other centre.

Can I challenge an MOT result?

Yes, you can appeal to the DVSA if you believe your car was unfairly failed.

How do I find a trustworthy MOT centre?

Check reviews, look at MOT history records, and use trusted resources like Check MOT.