Every vehicle has a unique Vehicle Identification Number (VIN) that acts like its fingerprint. Embedded within this 17-character code is critical information about the vehicle’s origin, body style, transmission, and most importantly, the engine type.
This guide provides a complete engine VIN number decoding chart, explaining each VIN position, where engine codes appear, and how different manufacturers encode engine details.
A VIN (Vehicle Identification Number) is a standardized 17-character alphanumeric code used globally for vehicles manufactured after 1981. Each character or group of characters represents specific information about the vehicle.
VIN Section
Characters
Purpose
WMI (World Manufacturer Identifier)
1–3
Manufacturer and country
VDS (Vehicle Descriptor Section)
4–8
Vehicle attributes (engine, body, drivetrain)
VIS (Vehicle Identifier Section)
9–17
Check digit, model year, plant, serial number
Limitations of VIN Engine Decoding
Limitation
Explanation
Manufacturer Variations
Codes differ by brand
Model-Year Changes
Same code may change meaning
Engine Replacements
VIN may not match current engine
Trim Differences
Same engine, different tuning
Final Thoughts
An engine VIN number decoding chart is an essential tool for mechanics, buyers, and vehicle owners. While VINs don’t always provide every technical detail, they reliably identify engine type, displacement, fuel system, and performance category when decoded correctly.
By understanding VIN structure and using manufacturer-specific charts, you can confidently identify the exact engine installed in almost any modern vehicle.
Ryan Gary
With a solid foundation of 20 years in the mechanical industry and a Mechanical Engineering degree, Ryan Gary brings a deep understanding of automotive systems to Engine Oil Journal.
Driven by a passion for vehicles and a commitment to providing accurate information, he created this platform to empower drivers to make informed decisions about engine oil care.
