eBay Motors Item Specifics: the Field-by-Field Guide
Item Specifics are how eBay Motors buyers filter — and how Cassini decides whether your listing appears when they do. Fill them wrong and you vanish from filtered search. Invent them and you risk VERO complaints. Here's the field-by-field playbook for unbranded auto parts.
The fields that drive Motors search
| Field | Fill with | Never |
|---|---|---|
| Brand | The actual brand, or Unbranded for generic aftermarket | A brand name the supplier didn't claim |
| MPN | The item's own part number, or Does Not Apply | An OEM number copied from the vehicle brand |
| OEM Part Number | The OE number of the original part this replaces — only if stated in your data, otherwise Does Not Apply | Guessing a Ford/GM number from a parts catalog |
| Interchange Part Number | Every OEM number the part replaces (527-027, K643168…) | Numbers not present in your source data |
| Placement on Vehicle | Front / Rear, Left / Right, Upper / Lower | A placement inferred from a photo |
| Type | The category-native type (Control Arm, Ball Joint…) | Marketing names |
| Material | Steel, aluminum, rubber — only if stated in data | A guess from how it looks |
MPN vs Interchange is the #1 mistake for dropshippers: the OEM number in your supplier title belongs in Interchange Part Number, while MPN is Does Not Apply for unbranded parts.
Why blanks cost more than you think
When a buyer filters by "Placement on Vehicle: Front Left" or searches an interchange number, eBay matches against Item Specifics — not your description text. A listing with empty specifics is invisible to every filtered browse session, which on Motors is most of them. Completed listings also get a relevance boost: eBay has stated listings with complete specifics rank better in best match.
The VERO trap for aftermarket sellers
eBay's Verified Rights Owner program lets brands take down listings that misuse their trademarks. The classic trigger: putting a vehicle brand's OEM number in the Brand or MPN field of an unbranded part. The number itself is fine — where you put it matters. Correct pattern:
- Brand: Unbranded
- MPN: Does Not Apply (or the aftermarket manufacturer's number if one exists)
- Interchange Part Number: all OEM numbers — this is the legally safe home for them
- Title: "…Replacement for Ford F-150" — compatible-with phrasing, never "Genuine Ford"
Let the generator fill them from your data
The ListKraft listing generator fills Item Specifics only from values that exist in your data package, marks missing ones as Does Not Apply, and flags suspicious values in its Notes to Seller section. See the output on a real part: Ford F-150 control arm example.
Where each of these fields sits in eBay's ranking logic — and why blank specifics cost more than a weak title — is covered in our eBay SEO guide for auto parts.
Generate Item Specifics free →FAQ
- What are Item Specifics on eBay?
- Structured fields (Brand, MPN, Interchange Part Number, Placement on Vehicle, Material, Type) that describe your listing to eBay's search engine. They power filter navigation and are a major Cassini ranking input.
- What MPN should I use for unbranded aftermarket parts?
- 'Does Not Apply'. Never copy a vehicle brand's OEM number into MPN — that misrepresents the brand and risks a VERO complaint.
- What is the difference between MPN and Interchange Part Number?
- MPN is the number assigned by the manufacturer of the item you sell. Interchange lists the OEM numbers the part replaces. For aftermarket parts, OEM numbers belong in Interchange.
- Which Item Specifics matter most for eBay Motors ranking?
- Brand, MPN, Interchange Part Number, Placement on Vehicle and Type drive the most buyer-filter traffic. Blank fields remove you from filtered results entirely.
- What if my supplier data is missing a value?
- Leave it blank or use Does Not Apply where allowed. Never guess: a wrong Interchange number causes returns, a wrong Brand can trigger IP complaints.