Shopify Marketplace Connect supports the use of K-Types or ePIDs to associate imported products with the applicable vehicle compatibility. There is no vehicle compatibility user interface for merchants to associate compatibility manually.
eBay only offers the use of K-Types for the UK, Germany, and Australia.
eBay offers the use of PIDs for eBay.com. For other marketplaces, there is no code-based vehicle compatibility.
If you have access to K-Type data you can enter the K-Type(s) in the relevant field (accessible from the Listings Page > Bulk Edit Mode > Upper right-hand corner). Click Columns:
Click Ktype (Vehicle Compatibility) box, click Add all, then click Done.
Click the "Edit" word to open the dialog box where you can enter the KType codes.
Note that, Marketplace Connect does not support assigning vehicle compatibility inside the Marketplace Connect grid (i.e. without K-Type data). For more on K-Type data see http://pages.ebay.com.au/help/sell/contextual/master-vehicle-list-manually.html
For further assistance, please reach out to marketplace-connect@shopify.com