Stage 4
Stage 4 · Diesel · 3.0 TDI 233hp
Audi Q7 3.0 TDI Stage 4 file Bosch · 4L0907401 · SW 383723
Audi Q7 3.0 TDI Turbo Diesel 171.4 kW (233 HP) Stage 42005, Turbo diesel, 171.4 kW (233 hp)
233 → 419 HP +186 HP +425 Nm 80% more power
Calibrated ECU file for (SW 383723). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 3.0 TDI 233hp, BUG, 3L, Diesel. Engine #610 in our gains database.
- Power
- 419 HP+186 HP from 233
- Torque
- 925 Nm+425 Nm from 500
- Fuel economy
- −8 %−12% full load
Real data from Gains API. Dyno curve = typical ECU-family projection. Final gains depend on fuel, altitude, wear.
How it works
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Read your ECU
With KESS, KTAG, AutoTuner or Flex. Keep the read: it is your way back.
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Match the numbers
Your read must show hardware 4L0907401 and software 383723.
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Pay and download
Card, Apple Pay or Google Pay. The file is in your account straight away.
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Write it and drive
Write it back the way you read it. Not right for your car? We correct it free.
What the car needs
Required modifications: Stage 4, Diesel.
Hardware
- Built / forged engine internals (rods, pistons)
- Large performance turbocharger
- Race-spec injectors and uprated fuel pump
- Race intercooler + uprated cooling
- Full performance exhaust (downpipe + catback)
- Reinforced clutch + uprated transmission cooling
- Optional: water-methanol injection
Software / calibration
- Fully bespoke calibration: typically dyno-tuned on installed hardware
- Fuelling rebuilt around race injectors / HPFP / E85 blend
- Boost, ignition / injection timing and lambda targeted to the build
- Closed-loop safeties retuned around the actual hardware envelope
Stage 4 is a fully built setup: figures shown are a typical envelope. The file is dyno-tuned to your specific hardware spec.
Vehicle & ECU specifications
Exact vehicle, engine and ECU identifiers this calibration file is written for. Cross-check against your ECU before flashing.
| Vehicle make | Audi |
|---|---|
| Vehicle model | Q7 |
| Model year | 2005 |
| Displacement | 3.0 L |
| Fuel / Induction | Turbo Diesel |
| Factory power | 171.4 kW (233 HP) |
| ECU manufacturer | Bosch |
| ECU hardware | 4L0907401 |
| ECU software | 383723 |
| Calibration stage | Stage 4 |
| Cylinder capacity | 2967 CC |
| Compression ratio | 17,0 : 1 |
| Bore × Stroke | 83,0 X 91,4 mm |
| OEM engine code | BUG |
| File format | BIN / ORI |
| Checksum | Pre-corrected (ready to flash) |
| Delivery | Instant download after payment |
Engine performance matrix
Power, torque and fuel-economy figures for every tuning stage on this engine, sourced from the tuning-database Gains API. Values are healthy-engine crank numbers; real on-road gains vary with fuel, altitude and mechanical condition.
| Stage | Power | Torque | Δ HP | Δ Nm |
|---|---|---|---|---|
| Original / Factory | 233 HP | 500 Nm | — | — |
| Stage 1 | 285 HP | 580 Nm | +52 (22.3%) | +80 |
| Stage 2 | 295 HP | 600 Nm | +62 (26.6%) | +100 |
| Stage 3 | 350 HP | 775 Nm | +117 (50.2%) | +275 |
| Stage 4 | 419 HP | 925 Nm | +186 (79.8%) | +425 |
About this calibration file
The Stage 4 calibration for the 2005 Audi Q7 3.0L Turbo Diesel is a built-engine tune. It assumes forged internals, large-frame turbo, upgraded transmission or clutch, and a standalone pre-tune dyno pass. The file is meant as a safe starting map for a professional tuner's in-car refinement.
This file matches a Bosch ECU with hardware number 4L0907401 and software version 383723. Verify both identifiers in your flashing tool before writing — an ID mismatch is the most common cause of a bricked ECU. If you are unsure, upload a read of your original file via the file-request wizard and our engineers will confirm compatibility before you flash.
Projected output on a healthy, stock-hardware example of this engine: 419 HP and 925 Nm at the crank — a gain of +186 HP (80%) and +425 Nm over the factory 233 HP / 500 Nm baseline. These numbers are sourced from our Vehicle Performance Database, which aggregates dyno results across this engine family. Real-world gains depend on fuel grade, ambient temperature, mechanical condition and intake/exhaust state.
The file is delivered as a ready-to-flash BIN (and ORI backup where applicable) compatible with all major tools — KESS V2/V3, KTAG, AutoTuner, CMDFlash, Dimsport New Genius, MPPS, Flex, BFlash, PCMFlash, MMFlash — via OBD, bench or boot-mode as supported by your ECU family. Checksums are pre-computed and verified; no additional checksum tool is required. All files include a free revision if post-flash logs reveal a fuelling, boost or EGT issue.
Frequently asked questions
4L0907401 (Bosch) listed in the specifications. Read your ECU with any supported tool (KESS, KTAG, AutoTuner, CMD, etc.) and compare the hardware + software numbers against the ones on this page. If they match exactly, the file is a direct fit. If you're not 100% sure, upload your original read via the file-request wizard and our engineers will confirm within minutes — no cost, no obligation.Product details
This product contains a calibrated Stage4 tuning file for Audi Q7 3.0 TDI 2005 Turbodiesel 171.4KW with Bosch 4L0907401 (Bosch software number 383723 ( 1037383723 )). The base stock vehicle for this calibration has a factory output of around 171.4 kW (~233 HP). This high-stage file targets heavily modified setups (bigger turbo, injectors etc.) and should be used by experienced tuners only.
All ECU tuning files from TUNING-DATABASE are prepared for professional use. They are useful whenever you search by ECU ID, hardware or software number such as 4L0907401, 383723 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
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