Free 1991 Buick Riviera VIN Decoder

How to decode a 1991 Buick Riviera VIN

Characters 1-3 of a 1991 Buick Riviera VIN

A World Manufacturer Identifier (WMI) is the first three characters of a Vehicle Identification Number (VIN), uniquely identifying the manufacturer, vehicle type, and location of construction. In the case of the 1991 Buick Riviera, the WMI “1G4” reveals that the vehicle was built by General Motors LLC in Warren, Michigan, United States, and is classified as a passenger car. This coding system is crucial for vehicle identification, regulatory compliance, and in tracking the history of a vehicle. The specific WMI for the 1991 Buick Riviera not only connects it to a prestigious manufacturer but also highlights its American origin and classification.

List of WMI Codes for a 1991 Buick Riviera

WMI: 1G4

• Model Years Covered: 1981-1985, 1987, 1989-1993, 1995-1999
• Example VIN: 1G4EZ13L0MU412551
• 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 Riviera 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 Riviera:

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 Riviera 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 Riviera VIN — Year Code

11th Character in the 1991 Buick Riviera VIN — Plant Code(s)

Known 1991 Buick Riviera Assembly Factory VIN Code(s)

VIN Characters 12 - 17 of a 1991 Buick Riviera

The final 6 characters in a 1991 Buick Riviera’s 17-digit VIN are its serial number, which will be unique to every vehicle.

Check your Buick Riviera’s VIN below:

What info can a 1991 Buick Riviera VIN reveal?

• Model Year and Place of Manufacture: The VIN can reveal the vehicle’s model year, indicating it may be a 1991 model produced in Hamtramck, Michigan, United States, offering insights into its age and production origin.
• Body Specifications: The vehicle is potentially a Coupe with 2 doors, revealing its body style and design tailored to specific preferences for compact and sporty vehicles.
• Engine Details: It may feature a 3.8 L (3800.0 CC or 231.89 CI) V-Shaped engine with 6 cylinders, possibly manufactured by BOCF and equipped with a Multipoint Fuel Injection system for fuel delivery, providing insights into its potential performance capabilities and technological advancements.
• Fuel Efficiency and Type: The primary fuel type for this vehicle is likely Gasoline, combined with a Multipoint Fuel Injection (MPFI) system, giving hints about its fuel consumption patterns and efficiency.
• Safety Features: It may be equipped with a front airbag at the driver’s seat only and manual seat belts, reflecting the vehicle’s approach to passenger safety and possibly indicating the safety standards during its manufacturing period.
• Vehicle Identification Details: The sample VIN, 1G4EZ13L0MU412551, specifically identifies this vehicle as a Riviera model, potentially assisting users in verifying vehicle authenticity, ownership history, recall information, and more.
• Manufacturer and Engine Manufacturer: Identifying the plant company name (NA-CLCD) and engine manufacturer (BOCF) provides additional insight into the production quality and engine reliability of the vehicle, potentially important for potential buyers and enthusiasts seeking specific manufacturing traits.

Sample VIN Decode Report for a 1991 Buick Riviera

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