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MOT · 4 min read

What Is an MOT Retest, and Is It Cheaper?

Failing an MOT isn't the end of the process. Once the fault's fixed, the car needs a retest, and depending on timing and where the work's done, that retest can be free, discounted, or full price.

The three retest scenarios

• Same day, same test centre. If you get the fault fixed and bring the car back to the same garage on the same day, most testing stations offer a free or significantly reduced partial retest, since they only need to recheck the items that failed rather than run the full test again.
• Within ten working days, same test centre. Many garages extend a reduced-fee partial retest window beyond just the same day, commonly up to ten working days, though this is at the tester's discretion rather than a strict legal requirement, so it's worth confirming with the specific garage.
• Different test centre, or outside the window. Taking the car elsewhere, or leaving it longer, generally means a full retest at full price, covering everything rather than just the failed items.

Partial retest versus full retest

A partial retest only re-examines the specific items that failed the first time. A full retest checks everything again from scratch. This is the main reason it's usually worth getting repairs done at the same garage that carried out the original test, provided you trust their pricing on the repair itself, since it can turn a full-price retest into a much smaller check.

What happens if you don't get it retested

A failed MOT with no valid certificate from before means the car legally can't be driven on public roads, aside from the two specific exceptions covered in our guide on driving without an MOT: travelling to a pre-booked test, or away from the failure to a pre-arranged repair, and only if nothing dangerous was flagged. There's no separate "grace period" for a failed test the way some people assume.

Checking before you commit to repairs

If you're looking at a used car that failed its last MOT and was never retested, it's worth checking exactly what it failed on before assuming the fix is simple. Full fail and advisory details are part of the public MOT record, and worth pulling up before agreeing a price that assumes a cheap fix.