JOHN DEERE · L21 ECU

JOHN DEERE 6140 L21 tuning files

Everything we work with on the JOHN DEERE 6140 fitted with the L21. Stock output across the matched variants spans 140–153 HP. 4 distinct variants are catalogued here. We start conservative here — Stage 1 and Stage 2 are the dependable baseline. Your file is built against the exact ECU software on the car, then operator-verified.

Upload your file →All 6140 coverage

Available solutions

Applicable work for the L21 on this vehicle. The available set firms up once the exact engine and software are known.

Stage 1 Stage 2

Engine variants & ECU software

4 distinct variants for the JOHN DEERE 6140 on the L21 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 6800 153HP
Engine code: 6068HL490
Controller brand: PHOENIX
ECU: L21
Stock power: 153 HP
ECU SW: SW62087B
ECU HW: RE543262

Variant 2

ECU

Catalog engine: 6800 153HP
Controller brand: PHOENIX
ECU: L21
Stock power: 153 HP

Variant 3

ECU

Catalog engine: 6800 153HP
Engine code: 6068HL490
Controller brand: PHOENIX
ECU: L21
Stock power: 153 HP
ECU SW: SW62087B
ECU HW: RE551416

Variant 4

ECU

Catalog engine: 6400 140HP
Controller brand: PHOENIX
ECU: L21
Stock power: 140 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 6140 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 6140 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.