Stage 2
Stage 2 · Diesel · 2.5 V6 TDI 150hp
Audi A6 2.5 TDI Stage 2 file Bosch HW 0281001931 · 4B0907401K · SW 356789
Audi A6 2.5 TDI Turbo Diesel 110.3 kW (150 HP) Stage 22002, Turbo diesel, 110.3 kW (150 hp)
150 → 213 HP +63 HP +146 Nm 42% more power
Calibrated ECU file for 0281001931 (SW 356789). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 2.5 V6 TDI 150hp, AKN, 2.5L, Diesel. Engine #10702 in our gains database.
- Power
- 213 HP+63 HP from 150
- Torque
- 456 Nm+146 Nm from 310
- 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 0281001931 and software 356789.
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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 2, Diesel.
Hardware
- Sport / decat downpipe (or DPF removal where legally permitted off-road)
- High-flow air intake (recommended)
- Optional: catback exhaust for lower backpressure
Software / calibration
- DPF / EGR / AdBlue switched off in software (where lawful)
- Boost & rail pressure raised to match new airflow
- Smoke limiter relaxed in line with hardware
- Lambda + EGT safeties retuned
Stage 2 keeps the factory turbo and internals. Final figures vary slightly with the exact hardware fitted.
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 | 2002 |
| Displacement | 2.5 L |
| Fuel / Induction | Turbo Diesel |
| Factory power | 110.3 kW (150 HP) |
| ECU manufacturer | Bosch |
| ECU ID | 4B0907401K |
| ECU hardware | 0281001931 |
| ECU software | 356789 |
| Calibration stage | Stage 2 |
| OEM engine code | AKN |
| 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 | 150 HP | 310 Nm | — | — |
| Stage 1 | 190 HP | 390 Nm | +40 (26.7%) | +80 |
| Stage 2 | 213 HP | 456 Nm | +63 (42%) | +146 |
| Stage 3 | 225 HP | 481 Nm | +75 (50%) | +171 |
| Stage 4 | 270 HP | 574 Nm | +120 (80%) | +264 |
About this calibration file
The Stage 2 calibration for the 2002 Audi A6 2.5L Turbo Diesel is written for vehicles with supporting bolt-ons: a higher-flow downpipe or sports catalyst, upgraded intercooler and upgraded intake are recommended. Boost targets, fuel-rail pressure, injector duration and VGT positioning are pushed further than a Stage 1 map while keeping exhaust-gas temperatures inside safe bands.
This file matches a Bosch ECU with hardware number 0281001931 and software version 356789. 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: 213 HP and 456 Nm at the crank — a gain of +63 HP (42%) and +146 Nm over the factory 150 HP / 310 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
0281001931 (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 Stage2 tuning file for Audi A6 2.5 TDI 2002 Turbo-Diesel 110.3KW with Bosch 0281001931 and software ID 4B0907401K (Bosch software number 356789 ( 1037356789 )). The base stock vehicle for this calibration has a factory output of around 110.3 kW (~150 HP). Stage 2 is intended for cars with supporting modifications (exhaust, intake, intercooler) and delivers a stronger performance gain.
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 0281001931, 4B0907401K, 356789 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
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