Guides and data
Guides for buying from Mexico.
Plain guides to the registries every Testigo record reads, and counts of the plants behind them. Each page names its sources and its date.
Checking a supplier
- How to verify a supplier in Mexico the seven checks, the three public registries, and where each one stops
- The Mexican RFC, and how to check one RFC format, the documents to request, and why public registries leave it out
- USMCA compliant suppliers in Mexico compliance attaches to the good; the nine data elements; what to ask
- Mexico supplier qualification checklist four stages, in order, with what to write down at each
The registries
- The IMMEX program, explained what IMMEX is, the five program types, statuses, and how to check a supplier
- The SAT 69-B list, explained Article 69-B in plain terms, the four statuses, and how to check a supplier
- How to find Mexican manufacturers in DENUE fields, SCIAN codes, bulk download, limits, and the Bajío counts
- The IMMEX directory in numbers programs by status, type, state and activity, from the August 2026 edition
Finding suppliers
- How to find auto parts suppliers in Mexico five sources ranked by what they prove, with counts by process and state
- How to find manufacturers in Mexico a method for finding manufacturers from public records, with counts
- Tier 1, Tier 2 and Tier 3 suppliers who buys from whom in auto parts, and how to tell a plant’s tier
The Bajío by state
- Aguascalientes: 195 auto-parts and metal plants 195 plants by process, size and municipality
- Guanajuato: 481 auto-parts and metal plants 481 plants by process, size and municipality
- Querétaro: 399 auto-parts and metal plants 399 plants by process, size and municipality
- San Luis Potosí: 288 auto-parts and metal plants 288 plants by process, size and municipality
Suppliers by process
- Stamping plants in Mexico’s Bajío 143 plants by state and size, and what to ask a supplier
- CNC machining plants in Mexico’s Bajío 277 plants by state and size, and what to ask a supplier
- Welded structure plants in Mexico’s Bajío 137 plants by state and size, and what to ask a supplier
- Wire harness plants in Mexico’s Bajío 98 plants by state and size, and what to ask a supplier
- Powertrain plants in Mexico’s Bajío 95 plants by state and size, and what to ask a supplier
- Seating and trim plants in Mexico’s Bajío 82 plants by state and size, and what to ask a supplier
- Coating and plating plants in Mexico’s Bajío 81 plants by state and size, and what to ask a supplier
- Steering and suspension plants in Mexico’s Bajío 47 plants by state and size, and what to ask a supplier
- Brake parts plants in Mexico’s Bajío 35 plants by state and size, and what to ask a supplier
- Wire form and spring plants in Mexico’s Bajío 34 plants by state and size, and what to ask a supplier
En español
- El RFC de un proveedor y cómo verificarlo formato del RFC, documentos que pedir y por qué los registros lo omiten
- DENUE del INEGI: para qué sirve y cómo usarlo campos, claves SCIAN, descarga masiva, límites y las cifras del Bajío
- El directorio IMMEX en cifras programas por estatus, tipo, estado y actividad, edición de agosto de 2026
- Cómo verificar un proveedor en México siete pasos, tres registros públicos y dónde termina cada uno
- IMMEX, explicado para compradores qué es IMMEX, sus cinco tipos, estatus y cómo consultar a un proveedor
- La lista 69-B del SAT, para compradores el artículo 69-B, los cuatro estatus y cómo consultar a un proveedor
- Aguascalientes: 195 plantas de autopartes y metal 195 plantas por proceso, tamaño y municipio
- Guanajuato: 481 plantas de autopartes y metal 481 plantas por proceso, tamaño y municipio
- Querétaro: 399 plantas de autopartes y metal 399 plantas por proceso, tamaño y municipio
- San Luis Potosí: 288 plantas de autopartes y metal 288 plantas por proceso, tamaño y municipio