BMW 4-Series F32/33 2013 onwards 420d remap
Standard this engine makes 190hp and 400Nm. Our STAGE 1 file takes it to 220hp and 440Nm.
Where the power arrives
Power and torque through the rev range, on the STAGE 1 file.
- Standard 190hp
- Remapped 220hp
- Standard 400Nm
- Remapped 440Nm
Stages for this engine
Stage 1 needs nothing fitted. Anything above assumes the supporting hardware is on the car already.
Remapping the 420d
The BMW 4-Series F32/33 2013 onwards 420d runs a factory calibration built to cope with poor fuel, skipped servicing and hot countries. We rewrite the fuelling, boost and timing for this engine on this car, then test it before you get it back. The original file is kept, so it can go back to standard whenever you want.
Diesels like this one gain most through the middle of the rev range, which is where you actually drive. It pulls from lower down, holds a gear on a hill, and needs fewer downshifts to overtake. Drive it the same way afterwards and the economy usually improves a little.
Figures on this page are for a standard car in good health. We read the fault codes and check the basics first, and if something needs attention we will tell you before we write anything. Have a look at the other engines on the F32/33 2013 onwards, the full 4-Series range, or everything we do for BMW.
Other engines on this 4-Series
F32/33 2013 onwards cars.
- 418d150hp standardDiesel
- 420d163hp standardDiesel
- 420d184hp standardDiesel
- 420d PP200hp standardDiesel
- 425d218hp standardDiesel
- 430d258hp standardDiesel
- 430d PP286hp standardDiesel
- 435d313hp standardDiesel
- 418i136hp standardPetrol
- 420i184hp standardPetrol
- 428i SULEV245hp standardPetrol
- 428i245hp standardPetrol
- 435i306hp standardPetrol
- 435i PP339hp standardPetrol
- M4431hp standardPetrol
- M4 Competition450hp standardPetrol
- M4 CS460hp standardPetrol
- GTS500hp standardPetrol
Similar power, other makes
Cars running about the same standard output, for comparison.
Other 4-Series generations
Book your 4-Series
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.