Original file
Original / Factory · Diesel · 2.0 TDI Ultra (150) 150hp
Audi A6 1.8 T original file Bosch HW 0261204256 · 4B0907557A · SW 357473
Audi A6 1.8 T 110.3 kW (150 HP) Original2004, 110.3 kW (150 hp)
150 HP Factory calibration Stock backup file, 310 Nm, Diesel
Calibrated ECU file for 0261204256 (SW 357473). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 2.0 TDI Ultra (150) 150hp, CSUD, 2.0L, Diesel. Engine #10723 in our gains database.
- Power
- 150 HPfactory calibration
- Torque
- 310 Nmfactory calibration
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 0261204256 and software 357473.
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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: Factory, Diesel.
Hardware
- Factory hardware: no modifications required
Software / calibration
- OEM calibration restored (recovery / immobiliser / coding work)
Original files are used to revert to factory state, repair after a faulty tune, or recover an ECU before service work.
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 | 2004 |
| Displacement | 1.8 L |
| Factory power | 110.3 kW (150 HP) |
| ECU manufacturer | Bosch |
| ECU ID | 4B0907557A |
| ECU hardware | 0261204256 |
| ECU software | 357473 |
| Calibration stage | Original (Factory) |
| OEM engine code | CSUD |
| 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
This is the factory (original) ECU calibration for the 2004 Audi A6 1.8L, extracted from a genuine stock control unit. Use it as a verified backup before flashing any performance tune, or as a reference when recovering an ECU from a failed write.
This file matches a Bosch ECU with hardware number 0261204256 and software version 357473. 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.
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
0261204256 (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 complete original ECU backup (stock file) for Audi A6 1.8 T 2004 110.3KW with Bosch 0261204256 and software ID 4B0907557A (Bosch software number 357473 ( 1037357473 )). This original file corresponds to a factory engine output of approximately 110.3 kW (~150 HP). This file is ideal for ECU cloning, restoring the car back to stock and using it as a safe base for future remaps.
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 0261204256, 4B0907557A, 357473 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
4ABA923C 8ED136BF 56E3C0D5 C06F7C14 5F765D65 A31021C1 616D3315 C203859D