Original file
Original / Factory · Diesel · 4.0 TDI 275hp
Audi A8 4.0 V8 TDI original file Bosch · 4E0907409C · SW 374102
Audi A8 4.0 V8 TDI Turbo Diesel 202.3 kW (275 HP) Original2004, Turbo diesel, 202.3 kW (275 hp)
275 HP Factory calibration Stock backup file, 650 Nm, Diesel
Calibrated ECU file for 4E0907409C (SW 374102). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 4.0 TDI 275hp, ASE, 3.9L, Diesel. Engine #522 in our gains database.
- Power
- 275 HPfactory calibration
- Torque
- 650 Nmfactory calibration
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 4E0907409C and software 374102.
-
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: 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 | A8 |
| Model year | 2004 |
| Displacement | 4.0 L |
| Fuel / Induction | Turbo Diesel |
| Factory power | 202.3 kW (275 HP) |
| ECU manufacturer | Bosch |
| ECU ID | 4E0907409C |
| ECU software | 374102 |
| Calibration stage | Original (Factory) |
| Cylinder capacity | 3936 CC |
| Compression ratio | 17,5 : 1 |
| Bore × Stroke | 81,0 X 95,5 mm |
| OEM engine code | ASE |
| 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 | 275 HP | 650 Nm | — | — |
| Stage 1 | 330 HP | 770 Nm | +55 (20%) | +120 |
| Stage 2 | 390 HP | 956 Nm | +115 (41.8%) | +306 |
| Stage 3 | 413 HP | 1008 Nm | +138 (50.2%) | +358 |
| Stage 4 | 495 HP | 1203 Nm | +220 (80%) | +553 |
About this calibration file
This is the factory (original) ECU calibration for the 2004 Audi A8 4.0L Turbo Diesel, 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 and software version 374102. 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
Product details
This product contains a complete original ECU backup (stock file) for Audi A8 4.0 V8 TDI 2004 Turbo-Diesel 202.3KW with Bosch 4E0907409C (Bosch software number 374102 ( 1037374102 )). This original file corresponds to a factory engine output of approximately 202.3 kW (~275 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 4E0907409C, 374102 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
872CB38E BEAA5860 7FA9FED4 F0CC049D 719A89ED 838415B4 BDEDF2D4 664F6414