Parts catalogs are updated when made available from the vendor. You may check for the latest update within the Catalog Management page of DX1.
Navigate to the Dashboard.
Click the InventoryManagement tile under the "Parts and Accessories" tile set.
Select Catalog Management from the left hand navigation menu under Management.
Press Enter to see all catalogs within your dealership or type a vendor in the search bar and press Enter.
The most recent update will be listed under the Last Update field.