Your vehicle may be able to have a partial retest for free or reduced fee in the following cases.
No Charge for a Re-test
If the vehicle is left at the test centre for repair and retested before the end of 10 working days following the day it originally failed, then only a partial retest is needed. There is no fee.
Replacing a lost or damaged MOT certificate
You can get a duplicate MOT certificate from any MOT testing station if you have lost or damaged the original.
You’ll need to give the vehicle registration number and either the original MOT test number, or V5C document reference number - this is on the V5C registration certificate.
The maximum fee for a duplicate certificate is £10, or half the full MOT test fee, whichever is lowest.
Vehicles exempt from MOT
Some vehicles don’t have to take an MOT test. These include:
goods vehicles powered by electricity
any vehicle less than 3 years old
cars and motorbikes made before 1960
A full list of currently exempt vehicles is on form V112. You need to fill in the form to tax your vehicle if it is exempt.
If your vehicle is a goods vehicle or public service vehicle weighing more than 3,500kg, you need to use the V112/G form.