Walmart Simplifies Fitment Data Requirements for Auto Parts
Walmart has reduced certain fitment attribute requirements for some auto parts, but sellers must still provide accurate Brand Name and Manufacturer Part Number (MPN).
What are the key facts?
- 1Walmart updated its automotive fitment rules on September 2, 2026
- 2Some fitment attributes are no longer required
- 3Sellers must still provide accurate Brand Name and MPN
- 4The FITMENT_MISSING_ATTR report type will be permanently removed
What happened?
Walmart Marketplace updated its Fitment and Vehicle Compatibility rules for the automotive category on September 2, 2026, changing the fitment data sellers must provide when creating and maintaining products. The platform reduced some required attributes, including AAIA Brand Id, Part Terminology Id, and Walmart Fitment Brand Code. The FITMENT_MISSING_ATTR report type related to missing fitment attributes will also be permanently removed from Seller Center and Partner API. At the same time, sellers must still provide an accurate Brand Name and the manufacturer-issued Manufacturer Part Number, or MPN. Walmart will use these fields to link products with vehicle fitment data. The platform also updated the vehicle fitment coverage report and added more detailed error messages to help sellers and service providers identify compatibility issues. The change affects sellers of auto parts, motorcycle parts, tools, and automotive electronics, including cross-border sellers. Although fewer fields must be entered, errors in the brand, model, compatible vehicles, or MPN may still limit product exposure, increase returns, or create compliance risks.
What does this mean for cross-border sellers?
Walmart has reduced some required fitment attributes for auto parts, but Brand Name and manufacturer MPN remain key fields for linking products with vehicle fitment data. Sellers of auto parts, motorcycle parts, tools, and automotive electronics should shift their focus from obsolete fields to the accuracy of the brand, model, compatible vehicles, and MPN.
What should sellers do now?
- 1Export Walmart listings for auto parts, motorcycle parts, tools, and automotive electronics, compare the Brand Name and manufacturer MPN for each item, create an exception list for missing, incorrect, or unverifiable data, and complete an item-by-item review.Listing Optimizer
- 2Update product creation and maintenance templates to remove mandatory dependence on AAIA Brand Id, Part Terminology Id, and Walmart Fitment Brand Code while retaining Brand Name and MPN fields, and produce a comparison of the old and new templates.
- 3Use the updated vehicle fitment coverage report and detailed error messages to check the brand, model, and compatible-vehicle associations for affected Walmart listings, create a repair list, and record completed updates.Listing character checker