JOHN DEERE · L4 ECU

JOHN DEERE 6850 L4 tuning files

Here is what the catalog holds for the JOHN DEERE 6850 on the L4. Across the matched variants stock power runs from 480 to 480 HP. 2 distinct variants are catalogued here. For this platform the dependable path begins with Stage 1 and Stage 2. We match the right calibration to your exact software and validate it before delivery.

Upload your file →All 6850 coverage

Available solutions

Solutions that apply to the L4 on this vehicle platform. The exact set depends on the specific engine and software version.

Stage 1 Stage 2

Engine variants & ECU software

2 distinct variants for the JOHN DEERE 6850 on the L4 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 12500 480HP
Engine code: 6125HZ005
Controller brand: PHOENIX
ECU: L4
Stock power: 480 HP
ECU SW: SW50794G
ECU HW: RE507980
Calibration: SW50794G

Variant 2

ECU

Catalog engine: 12500 480HP
Engine code: 6125HZ005
Controller brand: PHOENIX
ECU: L4
Stock power: 480 HP
ECU SW: SW50222I
ECU HW: RE507980
Calibration: 9999999999

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 6850 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 6850 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.