Foreign vehicles require a permit to enter Mexico. At the Mexico Customs at the Puente Colombia, there is a Banjercito module where the process is carried out, and information on the requirements can be found at this link: https://www.banjercito.com.mx/registroVehiculos/ When leaving Mexico, the vehicle's return to the United States must be registered to recover the security deposit. Before reaching the toll booths at Puente Colombia, there is a Banjercito module to complete the registration. Regardless of which Customs the vehicle entered through, the exit can be registered at this module. The operating hours for the Banjercito modules at the Puente Colombia are the same as those of the bridge, from 8:00 a.m. to 4:00 p.m. every day of the week. More information can be found at these links: Official Banjercito site https://www.banjercito.com.mx/registroVehiculos/ Government of Mexico: Information on the process https://www.gob.mx/tramites/ficha/permiso-para-importacion-temporal-de-vehiculo-extranjero/SAT2427 You can also contact the Banjercito module directly at the Puente Internacional Solidaridad Colombia by calling 8677340081.