Parallel.
Purchase a USA vehicle and import it into the "Free" zone of Baja California or Baja California Sur...
Either have a genuine sales receipt
Or Aduana, will GUESS the value of the vehicle (it won't be undervalued)
Pay ONE HUNDRED PERCENT ADUANA TAX of the value of the receipt or estimate.
Then Aduana gives 30 days to apply for ANAPROMEX. Which allows you to purchase FRONTERA license plates. Must be bonded for use in mainland Mexico.
Anapromex costs about 700 pesos. Then there is a state license fee.
Michoacan has not allowed the importation of ANY vehicles since 2004. Want to drive? Get Jalisco or Guerrero plates.
I went through the roundaround TWICE at Otay Mesa helping friends.
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The services at an ADUANAL, a licensed agent dealing with totally legal auto importation can be obtained at any major POE. Being referred by Aduana directly, eliminates any chance of getting a bogus importation certificate.
What an importation broker does, is deal with several agencies of the government. All paperwork is in Spanish legalize and every last centavo must be paid for in Pesos.
Aduana in Otay demanded the person who drives the car away, into Mexico have a valid Mexican driver license. They checked the license.