Engine Code by VIN
The 8th character of the VIN encodes the engine — here’s how to read it, and why decoding the whole VIN is the reliable way to know your engine.
Modern road VIN: 17 characters, no I / O / Q. Find your VIN.
Try an example:
Examples demonstrate the public data source; they are not vehicles offered for sale. Missing fields mean not reported, not “none.”
Compare two vehicles
Specifications reported by NHTSA. Empty data does not mean the feature is absent. Compare configuration labels and manufacturer records before buying parts.
Where the engine is in the VIN
A 17-character VIN is split into sections. Characters 4–8 are the Vehicle Descriptor Section, and on most vehicles the 8th character encodes the engine. The 10th character is the model year, and the 11th is usually the assembly plant.
The catch: the letter or number that means a specific engine in the 8th position is chosen by each manufacturer and can differ by model and year. There is no universal “8th digit = engine” chart that works across every brand — a code that means a 5.3L V8 on one GM truck can mean something else entirely on a different make. That’s why decoding the whole VIN (above) is the dependable method: it uses the manufacturer’s own record for that exact vehicle.
Engine-family guides
Popular engines people look up by VIN — each guide explains the family and lets you decode your VIN to confirm it.
Engine code by VIN — FAQ
Which digit of the VIN is the engine?
On most vehicles the 8th character of the VIN encodes the engine. However, the specific letter or number that means a given engine is set by each manufacturer and can change by model and year, so there is no single universal chart that maps the 8th digit to an engine across all makes.
How do I find my engine by VIN for free?
Decode the full VIN in the tool above. It reads the engine, displacement, cylinders, fuel type and (when available) horsepower straight from NHTSA’s public data — which is more reliable than trying to interpret the 8th character on its own.
Can the VIN tell me if the engine was swapped?
No. The VIN reflects the engine the vehicle was built with at the factory. If a different engine was installed later, the VIN still decodes to the original — an engine swap is not recorded in the VIN.
Why doesn’t my 8th digit match an online chart?
Most “8th digit engine code” charts are specific to one make (often GM or Ford) and one era. Applied to another brand or year they’ll be wrong. Decoding the whole VIN avoids that because it uses the manufacturer’s own record for that exact vehicle.
See also the VIN year chart (10th character), browse all makes, or decode any VIN.
OPTIONAL CHECKING TOOLS
Tools for reading a hidden marking
For a VIN plate, engine stamping or equipment label you cannot see clearly, a small light or mirror may help.
Telescoping LED inspection mirror
An adjustable lighted mirror for viewing a serial plate or engine marking at an awkward angle.
Inspect only with the vehicle or machine safely parked, switched off and cool.
View on AmazonLE LED pen flashlights
Two pocket lights with clips for reading VIN plates, equipment labels and engine markings.
Each light uses two AAA batteries (not included).
View on AmazonAs an Amazon Associate I earn from qualifying purchases. Check price and fit on Amazon.