Free Tool

Mileage Authenticity Checker

Check if an odometer reading is genuine using real Japan usage data. Detects rollbacks and flags suspicious readings.

7,000
Japan real avg km/year
Statista 2024
10,000
Export industry benchmark km/year
80,000
Sweet spot total km for imports
🔍 Check mileage authenticity
📋 Auction sheet data — add to detect odometer rollback:

How to use this mileage checker

  1. Enter manufacture year — the year the car was built (shown on the auction sheet and compliance plate). Not the import year.
  2. Enter current mileage in km — the odometer reading as shown on the car or in the seller's listing.
  3. Add auction data (optional) — if you have the auction sheet, add the mileage recorded at auction and the year. This enables rollback detection: if the car now shows fewer km than when it was auctioned, the odometer was tampered.
  4. Read your verdict — the tool compares your mileage against Japan's real 7,000 km/year average and flags anything suspicious.

Frequently asked questions

What is the average mileage for a Japanese car per year? +

Japan real average is 6,972 km/year (Statista 2024 survey). The export industry uses 10,000 km/year as the standard benchmark. A 10-year-old Japanese car should typically have 70,000–100,000 km.

What mileage is considered good for a Japanese import? +

Under 80,000 km total is the sweet spot — Grade 4.5 at auction. Under 50,000 km is excellent (Grade 5). Under 100,000 km is well within normal range. Japanese buyers avoid over 100,000 km, which means good value for import buyers.

How do I know if the odometer has been rolled back? +

Compare current mileage to the mileage on the original auction sheet. If current is lower than auction mileage — definite rollback. Also check the auction sheet mileage trust symbol: ✓ means verified by the inspector, ? means uncertain.

What does suspiciously low mileage mean? +

Under 2,000–3,000 km/year on a car older than 3 years is unusual even for Japan. It could be genuine (second car, rarely driven, stored) or a sign of tampering. Check service records, interior wear, and pedal condition — these should match the stated mileage.

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Get the complete auction history for any vehicle

The auction sheet shows the official mileage certified by a licensed Japanese inspector — with a mileage trust symbol (✓ verified, ? uncertain). Verify before you buy.

Verify Auction Sheet — from $7 →