Stage 1
Stage 1 · Diesel · 3.0 TDI 233hp
Audi A6 2.5 TDI Stage 1 file Bosch · 4F0907401B · SW 375256
Audi A6 2.5 TDI Turbo Diesel 171.4 kW (233 HP) Stage 12007, Turbo diesel, 171.4 kW (233 hp)
233 → 280 HP +47 HP +125 Nm 20% more power
Calibrated ECU file for 4F0907401B (SW 375256). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 3.0 TDI 233hp, ASB, 3L, Diesel. Engine #440 in our gains database.
- Power
- 280 HP+47 HP from 233
- Torque
- 575 Nm+125 Nm from 450
- 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
-
Read your ECU
With KESS, KTAG, AutoTuner or Flex. Keep the read: it is your way back.
-
Match the numbers
Your read must show hardware 4F0907401B and software 375256.
-
Pay and download
Card, Apple Pay or Google Pay. The file is in your account straight away.
-
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 1, Diesel.
Hardware
- No hardware changes required: runs on completely stock hardware
Software / calibration
- Boost pressure optimised within factory turbo limits
- Injection timing & quantity remapped
- Smoke / EGT limiters refined
- DTCs left intact, factory safeties preserved
Stage 1 is a software-only calibration. Compatible with stock turbo, injectors, intercooler, exhaust and clutch.
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 | A6 |
| Model year | 2007 |
| Displacement | 2.5 L |
| Fuel / Induction | Turbo Diesel |
| Factory power | 171.4 kW (233 HP) |
| ECU manufacturer | Bosch |
| ECU ID | 4F0907401B |
| ECU software | 375256 |
| Calibration stage | Stage 1 |
| Cylinder capacity | 2967 CC |
| Compression ratio | 17,0 : 1 |
| Bore × Stroke | 83,0 X 91,4 mm |
| OEM engine code | ASB |
| 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 | 450 Nm | — | — |
| Stage 1 | 280 HP | 575 Nm | +47 (20.2%) | +125 |
| Stage 2 | 331 HP | 662 Nm | +98 (42.1%) | +212 |
| Stage 3 | 350 HP | 698 Nm | +117 (50.2%) | +248 |
| Stage 4 | 419 HP | 833 Nm | +186 (79.8%) | +383 |
About this calibration file
The Stage 1 calibration for the 2007 Audi A6 2.5L Turbo Diesel is a drop-in remap that works on completely stock hardware — no turbo, injector, intercooler or fuel-system upgrades required. Injection timing, boost targets, rail-pressure limits and torque maps are rebalanced to extract the safe headroom the OEM leaves untouched for fleet-fuel tolerance, altitude margin and warranty buffer.
This file matches a Bosch ECU and software version 375256. 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: 280 HP and 575 Nm at the crank — a gain of +47 HP (20%) and +125 Nm over the factory 233 HP / 450 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
Product details
This product contains a calibrated Stage1 tuning file for Audi A6 2.5 TDI 2007 Turbo-Diesel 171.4KW with Bosch 4F0907401B (Bosch software number 375256 ( 1037375256 )). The base stock vehicle for this calibration has a factory output of around 171.4 kW (~233 HP). This Stage 1 calibration is designed for stock hardware, offering a safe and reliable increase in power and torque for daily use.
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 4F0907401B, 375256 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
85087875 9EF697A7 6492F313 87A32C72 DC86838D 1548731C E077A3B6 ED1E57A9