data.recalls[].not_available_reason on Vehicle Recalls (GET /v1/recalls, API documentation). When the upstream source provides a reason that a remedy is not yet available, that value is now returned instead of being dropped during response mapping. The field is null when the source does not supply a reason.
- Additive, backward-compatible change. Existing clients can ignore the new field.
- Present when the primary US recall source supplies a reason for the VIN; other sources may omit it or return
null.