How to decode a 1991 Buick Roadmaster VIN
Characters 1-3 of a 1991 Buick Roadmaster VIN
A World Manufacturer Identifier (WMI) is the initial sequence of characters in the Vehicle Identification Number (VIN), consisting of three characters that uniquely identify the manufacturer of the vehicle. For the 1991 Buick Roadmaster, the WMI “1G4” signifies that the vehicle was produced by General Motors LLC, based in Warren, Michigan, United States. This part of the VIN is crucial for identifying the car’s manufacturing origin, the entity responsible for its production, and its vehicle type, which in this case, is specified as a passenger car. The WMI is a global standard used by the auto industry to classify vehicles, ensuring a unique identification for every vehicle produced around the world.
List of WMI Codes for a 1991 Buick Roadmaster
WMI: 1G4
- Model Years Covered: 1991-1996
- Example VIN: 1G4BR83E1MW404671
- Manufacturer Name: General Motors LLC
- Vehicle Type: Passenger Car
- City: Warren
- State or Province: Michigan
- Country: United States
Characters 4-8 are the Vehicle Descriptor Section (VDS) of a 1991 Buick Roadmaster VIN
These characters correspond to components like:
- Engine type
- Transmission
- Model or trim
- Body style
- Gross vehicle weight range
Below find the known vehicle descriptor codes for a 1991 Buick Roadmaster:
| Known VDS for a 1991 Buick Roadmaster |
|---|
| BR83E |
Auto manufacturers have some discretion to decide how they want to code this section, but its contents and decoded results are generally consistent.
Character 9 is the “check digit” in a 1991 Buick Roadmaster VIN.
Based on a formula developed by the US Department of Transportation, it helps reduce fraud by ensuring the validity of the VIN.
10th Character in the 1991 Buick Roadmaster VIN — Year Code
| Year Code | Year |
|---|---|
| M | 1991 |
11th Character in the 1991 Buick Roadmaster VIN — Plant Code(s)
Known 1991 Buick Roadmaster Assembly Factory VIN Code(s)
| Plant Code | Plant City | Plant State | Plant Country | Plant Company Name | Example VIN |
|---|---|---|---|---|---|
| W | Ypsilanti Twp | Michigan | United States | Willow Run Assembly | 1G4BR83E1MW404671 |
VIN Characters 12 - 17 of a 1991 Buick Roadmaster
The final 6 characters in a 1991 Buick Roadmaster’s 17-digit VIN are its serial number, which will be unique to every vehicle.
Check your Buick Roadmaster’s VIN below:
How to find a 1991 Buick Roadmaster’s VIN?
Locating the VIN number on your 1991 Buick Roadmaster is key for identification. Here’s how to find it:
- Look at the dashboard on the driver’s side of your 1991 Buick Roadmaster. The VIN is typically found on a plate that can be seen through the windshield.
- Check the door jamb on the driver’s side of your Buick Roadmaster. There should be a sticker or plate with the VIN where the door latches when closed.
- Inspect the engine block for the 1991 Buick Roadmaster, since the VIN is sometimes stamped onto the engine itself.
- Examine the vehicle’s registration documents, as the VIN for your Roadmaster will be listed there.
- Look at the insurance card or policy for your 1991 Buick Roadmaster, as insurance companies always list the VIN on these documents.
What info can a 1991 Buick Roadmaster VIN reveal?
- Model Year: The VIN can reveal the vehicle’s model year, such as 1991, providing insights into the potential age and design era of the vehicle.
- Engine Specifications: Details about the engine, including its configuration possibly as V-Shaped, displacement in terms of CC (around 5000), CI (approximately 305.11872047366), and liters (approximately 5.0), as well as the number of cylinders (approximately 8) and the manufacturer (CPC), offer extensive knowledge about the vehicle’s powerplant.
- Fuel Type and Efficiency: The primary fuel type, in this case, Gasoline, alongside specifics like the throttle body fuel injection system, may shed light on the vehicle’s fuel usage and potential efficiency.
- Safety Features: Information regarding safety features, such as the possible presence of driver seat only front airbags and the type of seat belt (Manual), could be gleaned, highlighting the vehicle’s safety provisions.
- Body Class and Size: The body class is identified as a Wagon with 4 doors, and the trim as Estate Wagon, which can help users understand the vehicle’s size, utility, and style.
- Manufacturing Details: The assembly location, including the plant city (Ypsilanti Twp), state (Michigan), country (United States), and the plant company name (Willow Run Assembly), offers a glimpse into the vehicle’s production background.
- Vehicle Identification Details: Using a sample VIN (1G4BR83E1MW404671), one can decode vehicle-specific information such as the model (Roadmaster), which helps in verifying the authenticity and details of the vehicle.
Don’t have your 1991 Buick Roadmaster’s VIN handy? Try our license plate lookup instead!
Sample VIN Decode Report for a 1991 Buick Roadmaster
| Vehicle Spec | Value |
|---|---|
| Body Class | Wagon |
| Displacement (CC) | 5000.0 |
| Displacement (CI) | 305.11872047366 |
| Displacement (L) | 5.0 |
| Doors | 4 |
| Engine Configuration | V-Shaped |
| Engine Manufacturer | CPC |
| Engine Number of Cylinders | 8 |
| Front Air Bag Locations | Driver Seat Only |
| Fuel Delivery / Fuel Injection Type | Throttle Body Fuel Injection (TBI) |
| Fuel Type - Primary | Gasoline |
| Model | Roadmaster |
| Model Year | 1991 |
| Plant City | Ypsilanti Twp |
| Plant Company Name | Willow Run assembly |
| Plant Country | United States |
| Plant State | Michigan |
| Seat Belt Type | Manual |
| Trim | Estate Wagon |
| Vehicle Descriptor | 1G4BR83E*MW |
| Vehicle Type | Passenger Car |
| Sample_VIN | 1G4BR83E1MW404671 |
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