Variant 1
ECU- Catalog engine
- 12500 450HP
- Engine code
- 6125HZ014
- Controller brand
- PHOENIX
- ECU
- L4
- Stock power
- 450 HP
- ECU SW
- SW50794F
- ECU HW
- RE507980
JOHN DEERE · L4 ECU
JOHN DEERE 9520 L4 tuning files
The JOHN DEERE 9520 on the L4, mapped from stock file to finished result. Stock output across the matched variants spans 450–450 HP. Stage 1 and Stage 2 are the safe starting points for this platform. Each file is tied to the precise software on your car and checked before it goes out.
Available solutions
Solutions that apply to the L4 on this vehicle platform. The exact set depends on the specific engine and software version.
Engine variants & ECU software
1 distinct variant for the JOHN DEERE 9520 on the L4 ECU. Reference the engine and controller software when you upload.
Related vehicles
Other vehicles built on the L4 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 9520 on the L4?
Stage 1, Stage 2. The exact set depends on the specific engine and software version.
Do you cover the L4 ECU software on this model?
Yes — the JOHN DEERE 9520 on the L4 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.