4LAExxiss, Miley, Sooner and Universal Trailer Corporation Horse/Livestock Group trailers

Held by Exiss Sooner Trailer Manufacturing LLC · registered in the United States

WMI 4LA is the only three-character WMI in the catalog for the Exxiss make. It covers four makes: Exxiss, Miley, Sooner and Universal Trailer Corporation Horse/Livestock Group. Its rules start at model year 1994 and have no end year.

Models in the decoding rules, by model year

  1. Aluminum1994–2003
  2. Exiss2004–2015
  3. Miley2009–2015
  4. Sooner2009–2015
  5. Universal Trailer Corporation Horse/Livestock Group2016–2027

Where the rules place assembly

Plant countryUnited States

Plant locations namedEl Reno; Plant 500

Bodies and power

Body classesTrailer

Other codes starting with 4L

  • 4L1Innovative Enterprises, trailer
  • 4L4Floe International, trailer
  • 4L5Behnke Enterprises, trailer
  • 4L7Amrad Products and Supply, trailer
  • 4LCThe Lee, trailer
  • 4LELoad Eaz Trailer, trailer
  • 4LFFontaine Specialized, trailer
  • 4LMname not shown, truck
  • 4LNBeck Trailer Manufacturing, trailer
  • 4LRGamble Trailers, trailer
  • 4LVL & M Machine and Fabrication, trailer
  • 4LXWhitley Motor, trailer
  • 4LYMcclain Trailers, trailer

Source: NHTSA vPIC, October 2026 release (database updated October 17, 2026). How the figures are counted: How the catalog is read.