An MOT fails on any major or dangerous defect. A car that failed with a dangerous defect cannot be driven until repaired, with a fine of up to £2,500, a ban and 3 penalty points. A fail can be appealed to DVSA within 14 working days.
Figures verified 23 October 2026 against GOV.UK and DVSA
- Fail: Any major or dangerous defect
- Dangerous fail driven: Up to £2,500, ban, 3 points
- Appeal a fail: Within 14 working days
- Passed but should have failed: 3 months corrosion, 28 days other
Why a vehicle fails
A vehicle fails its MOT when the tester records at least one major or dangerous defect. Major defects are those that may prejudice the safety of the vehicle, put other road users at risk or have a more significant impact. The presence of any major defect means a fail, regardless of how many other items pass inspection.
Dangerous defects are the most serious category. They represent a direct and immediate risk to road safety or have a serious impact on the environment. As with major defects, any single dangerous defect means a fail. The distinction between the two categories reflects the degree of risk rather than the outcome, since both result in a failed test.
Minor defects have no significant effect on the safety of the vehicle or impact on the environment. A vehicle with only minor defects passes and receives a certificate. Recording minor defects is mandatory, so they appear on the test record even though they do not cause a fail. Advisory items are also noted without affecting the result.
| Result | What it means | Outcome |
|---|---|---|
| Dangerous | Direct and immediate risk to road safety, or serious environmental impact | Fail |
| Major | May affect safety, put other road users at risk, or more significant impact | Fail |
| Minor | No significant effect on safety or the environment | Pass |
| Advisory | Not deteriorated enough to fail; noted for information | Pass |
Source: DVSA MOT inspection manual, checked 23 October 2026.
Driving after a fail
After a failed MOT, whether the vehicle can be driven away depends on two conditions. It may be taken away only if the current MOT certificate is still valid and no dangerous problems were listed on the test result. If either condition is not met, the vehicle must be repaired before it is driven. In all cases, the vehicle must meet roadworthiness standards at all times while it is on the road.
Driving a vehicle that failed because of a dangerous problem carries serious penalties. This can mean a fine of up to £2,500, a driving ban and 3 penalty points. The penalties reflect the risk posed by a vehicle with a defect that makes it dangerous to drive, even where a valid certificate remains in place.
A fail is recorded in the MOT database. The test centre can also issue a refusal of an MOT test certificate, using form VT30. This document confirms that the vehicle has failed the test and sets out the defects found, including any that are classified as dangerous.
Appealing an MOT result
If a vehicle fails its MOT, the first step in appealing is to discuss the result with the test centre before any repairs are carried out. A DVSA complaint form must then be sent within 14 working days of the test. The DVSA makes contact within 5 days of receiving the form. The MOT enquiries line is 0300 123 9000, open Monday to Friday, 8am to 5pm.
Where the DVSA rechecks the vehicle, the full test fee is paid again. That fee is refunded if the appeal succeeds. Repairs should not be made until the appeal process has finished. The fee arrangement applies only to appeals against a fail.
A separate route applies where a vehicle passed but should have failed. The DVSA complaint form must be sent within 3 months for corrosion problems, or within 28 days for other defects. No test fee is paid for a recheck in that case.
| Situation | Deadline | Recheck fee |
|---|---|---|
| Vehicle failed and the result looks wrong | 14 working days from the test | Full fee, refunded if the appeal succeeds |
| Vehicle passed but should have failed: corrosion | 3 months | None |
| Vehicle passed but should have failed: other defects | 28 days | None |
Source: GOV.UK Test result appeals, checked 23 October 2026.
Frequently asked questions
What counts as a dangerous defect in an MOT?
Dangerous defects are a direct and immediate risk to road safety or have a serious impact on the environment. Any dangerous defect means a fail. The vehicle must meet roadworthiness standards at all times.
Can a vehicle be driven away after an MOT fail?
After a fail, the vehicle can be taken away only if the current MOT is still valid and no dangerous problems were listed. Otherwise it must be repaired first. It must meet roadworthiness standards at all times.
What penalty applies for driving with a dangerous defect after a fail?
Driving a vehicle that failed because of a dangerous problem can mean a fine of up to £2,500, a driving ban and 3 penalty points. A fail is recorded in the MOT database and form VT30 can be issued.
How is an MOT fail appealed?
To appeal a fail, discuss it with the test centre before any repairs, then send the DVSA complaint form within 14 working days of the test. DVSA makes contact within 5 days. Repairs should not be made until the appeal process has finished.
What happens if a vehicle passed but should have failed?
The DVSA complaint form must be sent within 3 months for corrosion problems or 28 days for other defects. No test fee is paid for a recheck in that case. The MOT enquiries line is 0300 123 9000, Monday to Friday, 8am to 5pm.
