JOHN DEERE · L25 ECU

JOHN DEERE S660 L25 tuning files

Tuning file coverage for the JOHN DEERE S660 running the L25 ECU. Stock output across the matched variants spans 325–325 HP. There are 2 distinct variants on file for this combination. 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.

Upload your file →All S660 coverage Custom ECU tuning file service

Available solutions

Applicable work for the L25 on this vehicle. The available set firms up once the exact engine and software are known.

Stage 1 Stage 2

Engine variants & ECU software

2 distinct variants for the JOHN DEERE S660 on the L25 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 9000 325HP
Controller brand: PHOENIX
ECU: L25
Stock power: 325 HP

Variant 2

ECU

Catalog engine: 9000 325HP
Engine code: 6068HCQ12
Controller brand: PHOENIX
ECU: L25
Stock power: 325 HP
ECU HW: RE577140

Related vehicles

Other vehicles built on the L25 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 S660 on the L25?

Stage 1, Stage 2. The exact set depends on the specific engine and software version.

Do you cover the L25 ECU software on this model?

Yes — the JOHN DEERE S660 on the L25 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.