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Truck and Truck Tractor VIN Systems: A Professional Guide to SAE J1108-2006
SAE J1108-2006 was established to provide direction for designing vehicle identification numbers (VINs) for trucks and truck tractors. Although cancelled in 2006 and its content incorporated into SAE J272, this standard remains a reference for understanding VIN structure and best practices.
Note: SAE J1108-2006 has been cancelled. For current requirements, refer to the latest revision of SAE J272.
🛠️ VIN Structure: WMI, VDS, and VIS
Per SAE J1108-2006, a truck or truck tractor VIN consists of three main sections:
- World Manufacturer Identifier (WMI): The first three characters, preassigned to the manufacturer in accordance with SAE J1044a.
- Vehicle Descriptor Section (VDS): Manufacturer-defined section that identifies vehicle attributes such as make, truckline, series, chassis type, body type, drive wheels, and engine types.
- Vehicle Indicator Section (VIS): The last eight characters of the VIN, with the final four being numeric. If the manufacturer chooses to designate model year or plant, it is recommended that year be the first character and plant the second.
| Section | Characters | Description |
|---|---|---|
| WMI (World Manufacturer Identifier) | 3 | Preassigned to manufacturer per SAE J1044a |
| VDS (Vehicle Descriptor Section) | Manufacturer-defined | Identifies make, series, chassis, engine, etc. |
| VIS (Vehicle Indicator Section) | 8 (last 4 numeric) | Includes model year (recommended first) and plant (recommended second) |
Engineering Design Insights and Recommendations
The standard provides flexibility in how manufacturers assign the VDS, but encourages consistency for traceability. Key insights include:
- Manufacturers have full control over the coding and sequence of the VDS, allowing them to tailor it to production needs.
- If model year or plant information is included in the VIS, following the recommended placement (year first, plant second) improves cross-referencing and decoding.
- The engine code must uniquely identify the vehicle power source as determined by the manufacturer.
⚠️ Important: SAE J1108-2006 may not be consistent with all national statutory requirements. Always verify compliance with local regulations.
🔍 Frequently Asked Questions
1. What are the requirements for the World Manufacturer Identifier (WMI) in a truck VIN?
The WMI must be three characters preassigned to the manufacturer according to SAE J1044a.
2. How should the Vehicle Descriptor Section (VDS) be structured?
The VDS is manufacturer-defined to identify vehicle attributes like make, series, chassis, and engine. The coding and sequence are determined by the manufacturer.
3. What are the specifications for the Vehicle Indicator Section (VIS)?
The VIS consists of eight characters, with the last four being numeric. If model year or plant is designated, it is recommended that year be the first character and plant the second.
4. How does this standard relate to national statutory requirements?
This SAE Recommended Practice may not necessarily be consistent with existing national statutory requirements. Always check local regulations to ensure full compliance.
