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Stage 3

Audi A4 RS4 Stage 3 file Bosch HW 0261S02165 · 8E1907560 · SW 379578

Audi A4 RS4 Petrol 308.9 kW (420 HP) Stage 3

2005, Petrol, 308.9 kW (420 hp)

Calibrated ECU file for 0261S02165 (SW 379578). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.

How it works

  1. Read your ECU

    With KESS, KTAG, AutoTuner or Flex. Keep the read: it is your way back.

  2. Match the numbers

    Your read must show hardware 0261S02165 and software 379578.

  3. Pay and download

    Card, Apple Pay or Google Pay. The file is in your account straight away.

  4. 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 3.

Hardware

  • Hybrid or larger turbocharger
  • Upgraded high-pressure fuel pump and / or injectors
  • Front-mount intercooler upgrade
  • Sport / decat downpipe + free-flow exhaust
  • High-flow air intake
  • Uprated clutch (manual gearbox)

Software / calibration

  • Custom map dialled to the installed turbo, injector and intercooler spec
  • Boost, fuelling, ignition / injection timing rebuilt around the new hardware
  • All safety limits (knock, EGT, lambda, rail) re-tuned to match
  • Drivability and torque-by-gear shaped to match the hardware

Stage 3 is hardware-matched. Send your turbo / injector / intercooler / clutch spec at checkout so the file is calibrated to YOUR build: typical projection above is a guide, final dyno depends on installed hardware.

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 A4 Rs4
Model year 2005
Fuel / Induction Petrol
Factory power 308.9 kW (420 HP)
ECU manufacturer Bosch
ECU hardware 0261S02165
ECU software 379578
Calibration stage Stage 3
File format BIN / ORI
Checksum Pre-corrected (ready to flash)
Delivery Instant download after payment

About this calibration file

The Stage 3 calibration for the 2005 Audi A4 Rs4 Petrol targets a hardware-upgraded setup — hybrid or larger turbocharger, upgraded injectors, high-flow fuelling and in most cases a full exhaust. Maps are redrawn for the new airflow envelope with re-scaled MAF/MAP, torque limiters, smoke limiters and boost PID re-tuned.

This file matches a Bosch ECU with hardware number 0261S02165 and software version 379578. 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

The file is written for the exact ECU hardware 0261S02165 (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.

This stage targets a built setup — hybrid/larger turbo, upgraded injectors, high-flow fuelling, and in some cases upgraded transmission/clutch. Running the file on stock hardware is not supported and can cause detonation, EGT spikes or overboost fuel cuts.

Re-flashing the ECU leaves a flag that a franchised Audi dealer can detect with their diagnostic tool. Most markets treat this as a basis to deny powertrain warranty claims that the modification could have caused. Emissions-sensitive components (DPF, EGR, SCR) remain fully functional with this calibration — we do not remove, disable or alter any emissions hardware.

The power and torque numbers on this page are healthy-engine crank figures. On a well-maintained 2005 Audi A4 Rs4 running a known-good fuel brand, you should see a clearly perceptible increase in mid-range pull — typically from 1,800 to 4,000 rpm on diesel, 2,500 to 6,000 rpm on petrol — along with a shorter 80-to-120 km/h in-gear time. Thermal performance and fuel consumption depend on how you drive post-tune.

Instant. As soon as the payment clears, the file appears under Downloads in your account and the link is emailed to you. It does not expire: sign in and download it again whenever you need it.

Pre-corrected. Every tuning file we sell is processed through CHKSuite (our in-house checksum engine) before it reaches your download link. You can flash it directly with KESS, KTAG, AutoTuner, CMD, Dimsport or any other supported tool — no extra checksum step required. A zero-CRC write to a modern Bosch/Siemens/Delphi ECU bricks the unit, so this is non-negotiable.

Contact us on WhatsApp or through the dashboard support thread. Free revisions are included for the same stage on the same ECU — send us a live log (via VCDS, INPA, EcuConnect, OBDeleven or similar) and we'll adjust timing, boost, rail pressure or smoke limits and re-issue the file. A failed flash itself (write aborted, bricked ECU) is recoverable with our Original file and a bench tool.

Product details

This product contains a calibrated Stage3 tuning file for Audi A4 RS4 2005 Benzin 308.9KW with Bosch 0261S02165 and software ID 8E1907560 (Bosch software number 379578 ( 1037379578 )). The base stock vehicle for this calibration has a factory output of around 308.9 kW (~420 HP). This high-stage file targets heavily modified setups (bigger turbo, injectors etc.) and should be used by experienced tuners only.

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 0261S02165, 8E1907560, 379578 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.

SHA-256 fingerprintAF1F78CA 17C3A936 BC4412FD 9A612C0C 243379D6 4ADE64C8 3729ACCB 4B84AA4E

Other files for this ECU

FileECUPrice
Audi A4 RS4 420 hp Original Bosch 0261S02165 379578 £6.99
Audi A4 RS4 420 hp Stage 1 Bosch 0261S02165 379578 £21.99
Audi A4 RS4 420 hp Stage 2 Bosch 0261S02165 379578 £24.99
Audi RS4 4.2 V8 420 hp Original Bosch 0261S02165 387944 £6.99
Audi RS4 4.2 V8 420 hp Stage 1 Bosch 0261S02165 387944 £21.99
Audi RS4 4.2 V8 420 hp Stage 2 Bosch 0261S02165 387944 £24.99
Audi RS4 4.2 V8 420 hp Original Bosch 0261S02165 387944 £6.99
Audi RS4 4.2 V8 420 hp Stage 1 Bosch 0261S02165 387944 £21.99

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