Stage 1
Audi S6 4.2 V8 Stage 1 file Bosch HW 0261203599 · 4A0907557C · SW 358376
Audi S6 4.2 V8 Petrol 213.3 kW (290 HP) Stage 11996, Petrol, 213.3 kW (290 hp)
Calibrated ECU file for 0261203599 (SW 358376). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
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 0261203599 and software 358376.
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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 1.
Hardware
- No hardware changes required: runs on completely stock hardware
Software / calibration
- Boost / load targets optimised within factory hardware limits
- Ignition advance refined for the running fuel grade
- Throttle response and torque request remapped
- Factory safeties (knock, lambda, EGT) 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 | S6 |
| Model year | 1996 |
| Displacement | 4.2 L |
| Fuel / Induction | Petrol |
| Factory power | 213.3 kW (290 HP) |
| ECU manufacturer | Bosch |
| ECU ID | 4A0907557C |
| ECU hardware | 0261203599 |
| ECU software | 358376 |
| Calibration stage | Stage 1 |
| File format | BIN / ORI |
| Checksum | Pre-corrected (ready to flash) |
| Delivery | Instant download after payment |
About this calibration file
The Stage 1 calibration for the 1996 Audi S6 4.2L Petrol 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 with hardware number 0261203599 and software version 358376. 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
0261203599 (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 Stage1 tuning file for Audi S6 4.2 V8 1996 Benzin 213.3KW with Bosch 0261203599 and software ID 4A0907557C (Bosch software number 358376 ( 1037358376 )). The base stock vehicle for this calibration has a factory output of around 213.3 kW (~290 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 0261203599, 4A0907557C, 358376 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
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