Stage 4
Stage 4 · Petrol · E-Tron 204hp
Audi A3 2.0 TFSI Stage 4 file Bosch HW 0261S05898 · 8P0907115Q · SW 502774
Audi A3 2.0 TFSI Turbo Petrol 147.1 kW (200 HP) Stage 42010, Turbo petrol, 147.1 kW (200 hp)
204 → 398 HP +194 HP +298 Nm 95% more power
Calibrated ECU file for 0261S05898 (SW 502774). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: E-Tron 204hp, CUK, 1.4L, Petrol. Engine #247 in our gains database.
- Power
- 398 HP+194 HP from 204
- Torque
- 648 Nm+298 Nm from 350
- 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 0261S05898 and software 502774.
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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 4, Petrol.
Hardware
- Built / forged engine internals
- Large performance turbocharger
- Uprated HPFP + race-spec injectors (often dual-pump)
- Race intercooler + chargecooler upgrade
- Full performance exhaust
- Reinforced clutch / uprated gearbox
- Optional: E85 / methanol fuel system
Software / calibration
- Fully bespoke calibration: typically dyno-tuned on installed hardware
- Fuelling rebuilt around race injectors / HPFP / E85 blend
- Boost, ignition / injection timing and lambda targeted to the build
- Closed-loop safeties retuned around the actual hardware envelope
Stage 4 is a fully built setup: figures shown are a typical envelope. The file is dyno-tuned to your specific hardware spec.
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 | A3 |
| Model year | 2010 |
| Displacement | 2.0 L |
| Fuel / Induction | TFSI (Turbo Petrol) |
| Factory power | 147.1 kW (200 HP) |
| ECU manufacturer | Bosch |
| ECU ID | 8P0907115Q |
| ECU hardware | 0261S05898 |
| ECU software | 502774 |
| Calibration stage | Stage 4 |
| Cylinder capacity | 1395 CC |
| Compression ratio | 10,0 : 1 |
| Bore × Stroke | 74,5 X 80,0 mm |
| OEM engine code | CUK |
| 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 | 204 HP | 350 Nm | — | — |
| Stage 1 | 280 HP | 480 Nm | +76 (37.3%) | +130 |
| Stage 2 | 297 HP | 504 Nm | +93 (45.6%) | +154 |
| Stage 3 | 337 HP | 543 Nm | +133 (65.2%) | +193 |
| Stage 4 | 398 HP | 648 Nm | +194 (95.1%) | +298 |
About this calibration file
The Stage 4 calibration for the 2010 Audi A3 2.0L TFSI (Turbo Petrol) is a built-engine tune. It assumes forged internals, large-frame turbo, upgraded transmission or clutch, and a standalone pre-tune dyno pass. The file is meant as a safe starting map for a professional tuner's in-car refinement.
This file matches a Bosch ECU with hardware number 0261S05898 and software version 502774. 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: 398 HP and 648 Nm at the crank — a gain of +194 HP (95%) and +298 Nm over the factory 204 HP / 350 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
0261S05898 (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 Stage4 tuning file for Audi A3 2.0 TFSI 2010 Turbo-Benzin 147.1KW with Bosch 0261S05898 and software ID 8P0907115Q (Bosch software number 502774 ( 1037502774 )). The base stock vehicle for this calibration has a factory output of around 147.1 kW (~200 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 0261S05898, 8P0907115Q, 502774 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
FB43C4EE 0AB09ECF 33CD283A A95122C6 BCFB62D7 0B4F7EAB 144B4B91 DBF708D7