ENGINE · 1993-2007
1FZ-FE / 1FZ-FE tuning
1FZ-FE — Toyota 4.5 inline-6 NA (Land Cruiser 80/100 / FJ Cruiser). I6 NA DOHC 24v, 4.5 L, 212-240 HP stock. Cars: Toyota Land Cruiser 80 / 100 / 105, Lexus LX450, FJ Cruiser (some markets).
Engine specs
| Engine code | 1FZ-FE / 1FZ-FE |
|---|---|
| Configuration | I6 NA DOHC 24v |
| Displacement | 4.5 L |
| Production years | 1993-2007 |
| Stock power | 212-240 HP |
| ECU family | Denso Toyota 32-bit → |
Tuning stages on 1FZ-FE / 1FZ-FE
| Stage 1 | +10-20 HP |
|---|---|
| Stage 2 | +20-40 HP (cams + headers + tune) |
| Stage 3 | +150+ HP (turbocharger / supercharger conversion) |
Conservative real-world estimates. Actual results depend on hardware health, fuel quality, ambient temperature, and the specific calibration written.
Services available on 1FZ-FE / 1FZ-FE
Common DTC codes on 1FZ-FE / 1FZ-FE
Brands running 1FZ-FE / 1FZ-FE
Workshop workflow
- Read the 1FZ-FE / 1FZ-FE ECU via OBD or bench using your existing flasher (KESS3, AutoTuner, MPPS, Trasdata, FRF).
- Open Softechpro V5 and drag the .bin / .ori / .hex / .s19 / .frf onto the workspace. The Denso Toyota 32-bit variant is auto-detected.
- Pick the service tab and apply Stage 1 / 2 / 3 / DPF OFF / EGR OFF / AdBlue OFF as required.
- Save patched .bin — the outer CRC is recomputed automatically.
- Flash via your existing flasher. Adaptation reset via OEM scan tool if required.