Variant 1
ECU- Catalog engine
- 12500 375HP
- Engine code
- 6125HH003
- Controller brand
- PHOENIX
- ECU
- L4
- Stock power
- 375 HP
- ECU SW
- SW50840C
- ECU HW
- RE507980
- Calibration
- SW50840C
JOHN DEERE · L4 ECU
JOHN DEERE 9860 L4 tuning files
Tuning file coverage for the JOHN DEERE 9860 running the L4 ECU. The matched variants sit between 375 and 375 HP from the factory. We start conservative here — Stage 1 and Stage 2 are the dependable baseline. We match the right calibration to your exact software and validate it before delivery.
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 9860 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 9860 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 9860 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.