4YDAlpine, Arcadia, Aspen Trail, Astoria, Avalanche, Bullet, Cameo, Carbon, Coleman, Colorado, Cougar, Cruiser, Fun Time, Fuzion, Hampton, Hideout, Impact, Keystone, Keystone/Atlas, Keystone/Denali, Keystone/Eddie Bauer, Keystone/Raptor, Keystone/Sprinter, Kodiak, Longhorn, Montana, Outback, Passport, Redwood, Reign, Residence, Retreat, Springdale, Sprout, Sunset Trail, Texan, Volante, Voltage, Walkabout, Yukon and Zinger trailers

Held by Keystone RV · registered in the United States

WMI 4YD is the only three-character WMI in the catalog for the Alpine make. It covers 41 makes: Alpine, Arcadia, Aspen Trail, Astoria, Avalanche, Bullet, Cameo, Carbon, Coleman, Colorado, Cougar, Cruiser, Fun Time, Fuzion, Hampton, Hideout, Impact, Keystone, Keystone/Atlas, Keystone/Denali, Keystone/Eddie Bauer, Keystone/Raptor, Keystone/Sprinter, Kodiak, Longhorn, Montana, Outback, Passport, Redwood, Reign, Residence, Retreat, Springdale, Sprout, Sunset Trail, Texan, Volante, Voltage, Walkabout, Yukon and Zinger. It was added to vPIC on August 29, 2017. Its rules start at model year 1996 and have no end year.