Mileage
Reading, unit, odometer status, observed time, and source.
Used Vehicle Retail Profile · 0.1
A used car is not just a VIN and a price.
Mileage, days in inventory, history reports, title, inspection, certification, warranty, and reconditioning all affect the retail answer. The protocol makes every one traceable.
One unit. Five kinds of evidence.
Inventory tenure
Stocked date, first-listed date, age basis, days, and as-of time.
History & title
Provider-neutral reports, title brands, prior use, and discrepancies.
Condition & recon
Named inspection system, component states, disclosed damage, completed work.
Certification & warranty
Manufacturer CPO stays distinct from dealer or third-party certification.
“47 days” is incomplete. The protocol shows which clock is running.
- 01Stocked
When the dealer accepted the unit into owned or consigned retail inventory.
- 02First listed
When the unit first appeared in a public retail listing. This can be later than stocked.
- 03Age basis
Which event produced the reported age—or whether a source supplied only days in stock.
- 04As of
The timestamp against which complete elapsed days were calculated.
A statement an agent can defend: “This vehicle has been in dealer inventory for 47 complete days as of September 1, based on the dealer inventory system.”
CARFAX and AutoCheck can disagree. The agent is not allowed to hide that.
CARFAX · synthetic fixture
no_events_reported
- Provider and report identifier
- Generated and observed timestamps
- Authorized summary fields only
- Link access method
same VIN
different evidence →
different evidence →
AutoCheck · synthetic fixture
events_reported: 1
- Separate provider provenance
- Separate freshness
- No silent reconciliation
- Unresolved discrepancy returned
For dealers