Understand mileage readings without jumping to conclusions
Compare dates, units and source context before deciding what a discrepancy means.
Keep the original units
An odometer reading may be recorded in miles or kilometres. Keep the value, unit, date and source together. Do not compare two figures as if they use the same unit until you have confirmed that they do.
Investigate a difference
A lower later reading needs explanation, but the numbers alone do not identify the cause. Recording errors, unit differences, instrument changes and other circumstances may need checking against original records. Ask for supporting documentation rather than inventing an explanation.
Use the record for questions
Compare MOT entries with invoices and other dated evidence where available. A consistent sequence does not independently prove every reading is genuine, and a history source may not hold every event. Our mileage calculator compares figures you provide; it does not certify the current odometer.
Your checklist
- Keep date, value and unit together
- Check original source records
- Ask about inconsistent readings
- Retain supporting evidence
- Avoid treating missing data as proof
Further reference: Open the source guidance ↗. General information; check the requirements and instructions for your actual vehicle and circumstances.