Fitment methodology
How AutoPartLens Evaluates Compatibility Confidence
What Confirmed by source, Possible fit, and Compatibility not confirmed mean—and why title keywords never prove exact fitment.
Key takeaways
- Confirmed by source requires meaningful compatibility evidence for the applicable selected configuration.
- Year, make, and model words in a title are relevance signals, not proof of fitment.
- Missing or unresolved engine, trim, position, production, or package details keep a result possible or unconfirmed.
The four internal confidence states
Confirmed means the source returned meaningful compatibility evidence that applies to the supplied vehicle attributes. Possible means some evidence exists but one or more important qualifiers remain unresolved. Unconfirmed means the listing appears relevant without sufficient compatibility evidence. Incompatible means a known conflict exists and the item is excluded from normal results.
Evidence is stronger than keywords
A title can be incomplete, copied, broad, or optimized for search. AutoPartLens may use title terms to reject obvious conflicts or rank relevance, but it does not convert those terms into confirmed compatibility.
Where supported, item-level compatibility checking supplies stronger evidence. An undetermined response or missing attributes remain unresolved; they are not silently promoted.
What the shopper still verifies
Before purchase, compare the manufacturer part number, engine, trim, body, transmission, drivetrain, position, production split, package quantity, and included components with the retailer or manufacturer catalogue. Use the VIN when that source requires it.
- Exact vehicle configuration
- Current manufacturer part number
- Front, rear, left, or right position
- Package quantity and required purchase units
- Seller compatibility notes and exclusions
- Return terms before installation
References
Sources and published site policy
- eBay Developers — CompatibilityResponseOfficial definitions for compatible, not compatible, and undetermined compatibility responses.
- eBay Developers — Check compatibilityOfficial item-level compatibility-check method and required vehicle attributes.
- AutoPartLens — Compatibility and pricing methodologyThe site’s published confidence, pricing, freshness, editorial, and corrections rules.