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Modern vehicle diagnostics use timestamped data to track how long certain parts last. If a mechanic needs to diagnose an issue with your transmission or engine, knowing the exact date the odometer data shifted helps them reconcile error codes and freeze-frame data stored within the vehicle's diagnostic system. How to Properly Document an Odometer Replacement
Federal law establishes significant penalties: up to three years in federal prison per count, criminal fines up to $250,000 for individuals, and civil penalties of up to $10,000 per violation. Notably, the penalties add up—tampering with 20 vehicles could result in 20 separate fines.
Note the replacement date and mileage in the vehicle’s service history log.
“Odometer replaced on [DATE]. Mileage at replacement: [XXX]. Current odometer reading is not actual mileage.”
On the day the new odometer is installed, the vehicle has a known true total mileage . For example:
The procedures for updating odometer records vary depending on the jurisdiction and the specific circumstances. Generally, the following steps are involved: