K, L, N, P, R, S, T, U, V, X, Y, Z, W and M. The letter I was not used because of its resemblance to the J, although it was only used with the letter D (remaining as DI.1234), the Ñ because it resembles the N and the Q with the O. There are only patents that begin with the letter O, if the vehicle belongs to a diplomatic representation . Currently, the letter J is used for the national registration of trailers for cargo transportation, which replaced the old registration system with comunas; for its part, the M exists in combinations from MZ to MX (given in reverse order). This combination allowed for a fleet of 5,289,999 vehicles. The first letter of the square allows to identify the year of the vehicle, although without exact precision and only from the letter D onwards. These years are: It is possible to observe vehicles whose plates begin with a letter that does not correspond to their year of registration, which may be because the vehicle was re-registered, or it was registered in an office where so few vehicles are registered that the combinations are delayed. The most common are: 'CH: Although there are some older vehicles (between 1970 to 1985) that have it, much of this combination was used between the years 1993 and 1997. BJ: less abundant than the previous letter. From between 27 00 to 30 00 FG: low abundance. From 26 01 to 30 99 CG: low abundance. HG: low abundance. From 97 00 to 99 99 The second letter can be one of the following 23: A, B, C, D, E, F, G, H, I, J, K, L, N, P, R, S, T, U, V, X , Y, Z and W. M and W were left out for being too wide, Ñ for its resemblance to N, O for its resemblance to zero, and Q for its resemblance to O and zero. The I was only used in the combination DI. In plates beginning with letters A, B, C, E, F, G and H, the sequential order is expressed in the second letter, for example, the sequential order of the first series was AA - BA - CA - EA, and so on; the next series was AB - CB - EB - FB, and so on. Initially, the letter D was not used at the