Smart ForFour
Smart ForFour 454 2005 to 2014
3 engines covered on this shape. Pick yours for the standard figures, the gains and the price.
Diesel engines
2 options on the ForFour 454 2005 to 2014.
Petrol engines
1 option on the ForFour 454 2005 to 2014.
Finding your engine
The engine size is on your V5C, and most cars carry the badge on the boot lid. Where a model was sold with several power outputs of the same engine, they are listed separately above because the files and the gains are different.
Get it wrong and nothing is lost. We check the engine against the car before we write anything to it.
Other ForFour generations
Book your ForFour
We write and test every file at our Aston workshop, on our own rolling road. Ring us with your reg and we will tell you what your car should make before you commit to anything.