CarHistory is a free web-based MOT history checking tool for used-car buyers. Users enter a vehicle registration of 2 to 8 letters and numbers, and the service returns MOT records from DVSA data, including each test result, recorded faults and advisories, and mileage readings. The site states that every MOT since 2005 is available on record and that mileage drops are flagged. It is an independent site and is not affiliated with DVSA or GOV.UK. The information is presented for guidance only. The tool provides access to MOT histories by registration and includes sections for checking a car, browsing car models from A to Z, comparing history checks, and reading guides. Its explanatory content covers what to look for in an MOT record, what an MOT history cannot show, MOT outcomes for cars first used in 2015 when tested in 2025, and common faults and years to avoid by model. It also notes that an MOT history does not include outstanding finance, insurance write-off status, reported theft, or number plate changes, and that a paid vehicle history check covers those areas. Typical use involves checking a used car before purchase, reviewing repeated advisories, comparing mileage between tests, and identifying a fail followed by a quick pass that may indicate a repair and retest. The service requires no account and does not place the registration in the web address. According to the site, the server keeps the result for 15 minutes under a scrambled copy of the registration and then deletes it. CarHistory uses official DVSA MOT records and contains public sector information licensed under the Open Government Licence v3.0.