Variant 1
ECU- Catalog engine
- 9000 340HP
- Engine code
- 6090HN006
- Controller brand
- PHOENIX
- ECU
- L21
- Stock power
- 340 HP
- ECU SW
- SW61517D
- ECU HW
- RE543662
- SW upgrade
- RG6090G008447
JOHN DEERE · L21 ECU
JOHN DEERE 4940 L21 tuning files
Here is what the catalog holds for the JOHN DEERE 4940 on the L21. The matched variants sit between 340 and 340 HP from the factory. 3 distinct variants are catalogued here. For this platform the dependable path begins with Stage 1 and Stage 2. Each file is tied to the precise software on your car and checked before it goes out.
Available solutions
What we can run on the L21 for this vehicle — the precise options narrow down by engine and software version.
Engine variants & ECU software
3 distinct variants for the JOHN DEERE 4940 on the L21 ECU. Reference the engine and controller software when you upload.
Variant 2
ECU- Catalog engine
- 9000 340HP
- Engine code
- 6090HN004
- Controller brand
- PHOENIX
- ECU
- L21
- Stock power
- 340 HP
- ECU SW
- SW60664K
- ECU HW
- RE547831
Variant 3
ECU- Catalog engine
- 9000 340HP
- Controller brand
- PHOENIX
- ECU
- L21
- Stock power
- 340 HP
Related vehicles
Other vehicles built on the L21 controller or the same engine — handy when a platform spans several models and makes.
Questions, answered.
Which tuning solutions are available for the JOHN DEERE 4940 on the L21?
Stage 1, Stage 2. The exact set depends on the specific engine and software version.
Do you cover the L21 ECU software on this model?
Yes — the JOHN DEERE 4940 on the L21 ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.
How is the file delivered?
Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.