Engine code by VIN: where it sits, and when the VIN leaves it out

North American VINs identify the engine by law

US rules require positions 4 to 8 of a passenger car VIN to identify the engine type, along with the line, series, body type and restraint system. The manufacturer chooses where each attribute goes and publishes how to read it.

General Motors, Ford and Chrysler put the engine in position 8. Ford publishes position 8 tables that match each code to an engine displacement, and Hyundai uses position 8 for the engine type as well.

One character can cover several versions

Position 8 gives you a single character for the engine, and a manufacturer can use one character for more than one version of that engine. Before you order parts that change between versions, such as injectors or a turbocharger, confirm the exact engine in the catalog.

Decode the VIN in the catalog and you get the engine the car left the factory with, at the level of detail a parts lookup needs.

European VINs often leave the engine out

Cars built for Europe follow the international VIN standard, which leaves the middle characters to the manufacturer without a list of required attributes. Volkswagen’s European VINs fill positions 4 to 6 with ZZZ, so those characters carry no engine information at all.

On those cars you read the engine code somewhere else. Volkswagen prints it on the vehicle data sticker next to the PR codes, and Renault shows the engine type on the manufacturer’s plate.

Trust the block over the sticker

Most manufacturers stamp the engine code on the block. A code on a cover sticker is less reliable, since mechanics swap covers during belt jobs and dismantlers strip whichever one is cleanest, a trap our Renault engine code guide covers in detail.

If the stamp and the paperwork disagree, go with the stamp for parts, since it describes the engine in the car today.

After an engine swap

A VIN records the engine the car left the factory with. If someone has fitted a different engine since, the VIN decode and the car disagree, and the engine parts have to match the engine in the car today.

Read the block stamp, look the engine up by its own code, and write the VIN and the fitted engine code on the job card together. The next person who orders for that car then has both facts in front of them.

Same size, different engine

Two engines of the same displacement can take different parts, and a petrol and a diesel of one size share little. Order by engine code, and read the displacement on a quote as a description of the engine. The code identifies it.

Engine codes on VINsearch

In the catalog you decode the VIN and read the engine and gearbox the car left the factory with, for North American and European cars alike. For the gearbox side, see gearbox code by VIN.