メーター交換 on a Japanese auction sheet means the meter (instrument cluster) was replaced. 改ざん means the reading was tampered with. 走行不明 means nobody knows the real mileage. A replaced meter can be innocent — tampering never is — but either way the dial stops being proof. To check a Japanese car's real mileage, compare every auction record by chassis number, read the notes, and ask for old inspection papers.
🔑 Key takeaways
- Replaced isn't tampered. A swapped meter can be an honest repair. A tampered one is always a lie.
- Unknown means unknown. When the sheet says the real mileage is unknown, price the car as high-mileage — whatever the dial says.
- Look beside the number. Many auction houses print a marker (often ＊) next to readings they can't vouch for.
- Mileage only goes up. Across auctions the readings must rise — but check exact figures before you shout “rollback”.
- Wear doesn't lie. A worn, shiny steering wheel on a “39,000 km” car says more than the dial.
In this guide
The Japanese words that change the odometer
These are the lines that matter. They usually sit in the inspector's notes, the seller's caution box, or right next to the mileage figure.
| On the sheet | In English | What it means for you |
|---|---|---|
| メーター交換 | Meter replaced | The cluster was changed. Earlier kilometres may be missing from the dial. Ask what it read at the swap. |
| 交換時 + km | Reading at replacement | Good news. Add this figure to today's reading for a truer total. |
| 改ざん | Tampered, altered | Someone changed the reading on purpose. The real figure can't be recovered from the dial. |
| 走行不明 | Mileage unknown | Treat the car as high mileage. The number shown is not evidence. |
| マイル | Miles | The meter reads miles, not km. Multiply by 1.6 before you compare. |
Here's how it looked on a real sheet we checked:
Meter replaced vs tampered: why the difference matters
Replaced can be innocent. Meters fail, get damaged, or are swapped for a newer design. An honest seller declares it — and some sheets even record the reading at the swap.
Tampered never is. 改ざん means the number was changed to deceive. It's the heaviest mileage finding a sheet can carry.
The effect is the same. Once a meter is replaced with no recorded reading, or tampered with, the dial stops being evidence. No calculation brings the real figure back.
Japan takes this seriously. Auctions share a mileage database and compare each car's reading with its past sales, which is why a suspicious number usually gets flagged on the sheet. That's also why the sheet, not the dashboard, is the document to trust.
How to check a Japanese car's real mileage in 5 steps
- Pull every auction record for the chassis. Put the readings in date order. They must only go up. Our mileage checker and full verification report line them up for you.
- Use exact figures, not rounded ones. Some listings round to the nearest 1,000 km. Two roundings of the same reading can look like a drop that never happened.
- Read the notes and the marker. Look for 交換, 改ざん, 不明 and any symbol beside the mileage. Each house prints its own legend — read it on the sheet, or get it translated.
- Match the wear to the number. Steering wheel, seat bolster, pedals, gear knob. The note ハンドルスレ (worn steering wheel) on a low-mileage car is a loud warning.
- Ask for paper. Old Japanese inspection (shaken) records and a stamped service book carry dated readings. Dated photos of the dashboard help too.
Three real cars from our desk
The seller declared the meter replaced and tampered, and the auction flagged the reading too. The inspector noted a worn steering wheel and cabin wear — not what 39,000 km looks like. No service book. It sold the same day for ¥565,000 — well under our ¥700,000–900,000 estimate for the same car with proven mileage.
Two listings two days apart showed 176,000 km, then 175,000 km. Both original sheets read 175,109 km — one list rounded up, the other down. No tampering. Clearing it protected the car's value.
12,751 km, then 12,763 km, then 12,848 km — small rises in the right direction, from three separate inspectors. That's the strongest mileage evidence a buyer can get.
What unknown mileage does to the price
It depends on age. On a nearly new car, buyers pay a big premium for low mileage, so unknown mileage wipes out a lot of value. On a 13-year-old car nobody pays that premium anyway, so the discount is smaller.
It never goes away. The history follows the chassis. In many countries you must disclose it when you sell — keep the report with the car's papers.
So price it honestly: as a high-mileage car, with a mechanical check budgeted in. Never as the low-mileage car the dial pretends it is.
Check the mileage history before you pay
One chassis number shows every recorded auction reading, the original sheet and the inspector's notes.
Verify auction sheet — $8 →⚠️ Common mistakes to avoid
Frequently asked questions
Sources
Case examples come from JP Sheet reports; chassis numbers are removed to protect our customers.