Agricultural · ECU Remapping
John Deere Tractor 4000 Series 4120 2.4L I4 43 hp Tuning (2004–)
Factory specification and Stage 1 remap gains for the John Deere Tractor 4000 Series 4120 2.4L I4 43 hp (2004–). A Stage 1 calibration adds 5 BHP and 35 Nm — software only, no hardware modifications required.
| Measure | Original | Stage 1 |
|---|---|---|
Power BHP | 43 | 48Estimated +5 BHP · +12% |
Torque Nm | 215Estimated | 250 +35 Nm · +16% |
+5 BHP
Stage 1 power gain (estimated)
+35 Nm
Stage 1 torque gain (estimated)
Estimated figures are based on engine, ECU and comparable application data. Actual results can vary depending on software version, machine condition and configuration.
Rolling road
Dyno Graph
Power (BHP, solid) and torque (Nm, dashed) across engine speed (RPM). Peak figures match our database exactly.
Hover / touch the graph
Stock: 43 bhp · 214.9 Nm (peak)
Stage 1: 48 bhp · 249.9 Nm (peak)
Tuning tool compatibility
This ECU is listed in 2 of 4 manufacturer compatibility databases.
AutoTuner
Supported
ECU: Bosch EDC17CV54
Alientech KESS3
Not listed in this manufacturer's data — ask us, coverage updates frequently.
Magicmotorsport FLEX
Not listed in this manufacturer's data — ask us, coverage updates frequently.
Dimsport New Genius / New Trasdata
Supported
ECU: Bosch EDC17CV54
Existing customers upload their ECU file via the Regal Tuning File Portal. New to Regal? Request a quote first.
20+ years of ECU calibration
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