Smart ForFour
Smart ForFour 453 2014 onwards
3 engines covered on this shape. Pick yours for the standard figures, the gains and the price.
Petrol engines
3 options on the ForFour 453 2014 onwards.
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.