If you’re a Smart owner, one of the important pieces of information you should know is the engine number. The engine number is a unique identifier that helps identify the type and specifications of the engine installed in your vehicle. In this article, we’ll discuss the basics of Smart engine numbers, their significance, and how to locate them.
What is a Smart Engine Number?
A Smart engine number is a unique sequence of characters that identifies the engine installed in your car. This sequence is usually made up of letters and numbers and is specific to the make and model of your car. The engine number is usually stamped on the engine block or on a metal plate located on the engine.
Location of the Smart Engine Number
The engine number for the Smart is typically located on the engine block. To find the Smart engine number, you’ll need to open the engine compartment, which is located in the rear of the car. Once you have access to the engine block, you should be able to locate the engine number stamped onto the block. It may also be located on a metal plate attached to the engine.
Smart Series 450 / 451 / 452
On older-type petrol engines, it can be read from above

Older-type petrol engine

On newer-type petrol engines (the 451 Series),
it is on a smooth spot on the crankshaft casing on the side facing the interior
(access is very difficult)

Close-up view of a newer-type petrol engine (only the short form/Smart engine number is put on and not the 14-character engine number)

Turbo-Diesel engine,
It is on a smooth spot on the transition to the gearbox on the side facing the rear of the vehicle

Close-up view of a Turbo-Diesel engine

View of the engine number on a Turbo-Diesel engine when the engine has been fitted

The ECU on the 451 Series is
on the right, rear quarter panel behind the safety belt spool

Series 454
Petrol engine (47 to 90 kW)
The Smart engine number on petrol engines is on the crankshaft casing

Smart Petrol engine, close-up view


BRABUS petrol engine (130 kW)
Read Also: Smart VIN Number




Diesel engine




Smart Engine Number Sticker
In addition to the numbers stamped onto the metal, Smart engines also have stickers on which the complete 14-character Smart engine number is repeated. These stickers are on the top of the engine and easy to read.






Decode of the Smart Engine Number
Decode of the Smart Engine Number on the 450/451/452 Series
Examples
Gasoline engine |
132910 |
2 |
0254209 |
7 |
Turbo-Diesel engine |
660950 |
8 |
0889452 |
4 |
|
1 |
2 |
3 |
4 |
1 = Engine construction pattern
2 = Engine plant codes
3 = Serial number
4 = Check digit (not part of the engine number)
The Smart engine number on newer patrol engines is abbreviated (so-called Smart engine number). The last 4 characters are identically equal to the 14 digit engine number. (Example 3B21 BJ4209)
Further options of the Decode of the Smart Engine Number on the 450 / 452 Series from October 2003
Example
13 |
099 |
08 |
0374416 |
1 |
2 |
3 |
4 |
1 = Type / Variants
2 = Day of the respective year
3 = Year
4 = Serial number
In the VEDOK and FADA system the 14 digit engine number is only shown with 11 characters, i.e., without the type / variants and only with the single-figure year (the last digit of the year).
Decode of the Smart Engine Number on the 454 Series
Petrol engine (47 to 90 kW)
13 | 5 | 9 | 50 | 8 | 1 | 758239 |
1 | 2 | 3 | 4 | 5 | 6 | 7 |
1 | = | Engine type |
13 = Petrol | ||
2 | = | Number of cylinders |
4 = 3-cylinders 5 = 4-cylinders | ||
3 | = | Engine type |
9 = Family A9 | ||
4 | = | Kind of engine (Engine capacity) |
10 = 1,1 litre (47 or 55 kW 30 = 1,3 litre (66 kW) 50 = 1,5 litre (80 or 90 kW) | ||
5 | = | Manufacturing plant code |
8 = The Kölleda plant | ||
6 | = | Surpassing the million mark |
0 = 000.001 – 999.999 1 = 1.000.000 – 1.999.999 | ||
7 | = | Serial number |
Petrol engine (130 kW)
4 | G | 1 | 5 | AB1234 |
1 | 2 | 3 | 4 | 5 |
1 | = | Number of cylinders |
4 = 4-cylinders | ||
2 | = | Fuel type |
G = Petrol engine | ||
3 | = | Development number for the engine series |
4 | = | Development stage for the engine series |
5 | = | Serial number (2 letters + 4 numbers) |
Diesel engines (from Daimler AG)
639 | 939 | 7 | 1 | 758239 |
1 | 2 | 3 | 4 | 5 |
1 | = | Engine series |
639 = Diesel | ||
2 | = | Engine model |
939 = 1,5 litre engine capacity | ||
3 | = | Manufacturing plant code |
7 = The Untertürkheim plant | ||
4 | = | Surpassing the million mark |
0 = 000.001 – 999.999 1 = 1.000.000 – 1.999.999 | ||
5 | = | Serial number |
The Significance of the Smart Engine Number in Vehicle Sales
The Smart engine number can also play a role in the buying and selling of Smart cars. When buying a used car, it’s important to verify the authenticity of the car and its engine. The engine number can help you do this by confirming that the engine installed in the car matches the make and model specified by the seller. This can help prevent fraud and ensure that you’re getting a fair deal.