STAGE 2 Petrol 5.2 FSI V10 450hp

Audi S8 4.4 FSI Turbo Diesel 331 kW (450 HP) Stage 2

0120240360480 1000200030004000500060007000 504 HP +54 593 Nm +53 HP Nm RPM 0140280420560
Stock Stage 2 HP / Nm projection
450 504 HP
+54 HP +53 Nm 12% more power

Calibrated ECU file for . Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.

16,293 calibration files in catalog · 9,693 engines · 400+ ECU platforms · Engineering since 2012 · WhatsApp support · < 30 min first response
Performance Projection Engine #736 · Gains DB TYPICAL PROJECTION
MATCHED ENGINE 5.2 FSI V10 450hp BSM 5.2L Petrol Stage 2
0120240360480 1000200030004000500060007000 504 HP +54 593 Nm +53 HP Nm RPM 0140280420560
Stock Stage 2 HP (left) · Nm (right) · Curve shape typical for this ECU family
Real data from Gains API Dyno curve = typical ECU-family projection Final gains depend on fuel, altitude, wear
Required Modifications Stage 2 · Petrol
Hardware
  • Sport / decat downpipe (or sports-cat)
  • High-flow air intake
  • Optional: front-mount intercooler upgrade for sustained boost
Software / Calibration
  • Cat-warm-up & secondary lambda re-mapped for decat hardware
  • Boost target raised in line with cooling capacity
  • Knock / ignition advance re-trimmed
  • Idle and load-transition tables refined

Stage 2 keeps the factory turbo and internals. Final figures vary slightly with the exact hardware fitted.

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 S8
Model year 2009
Displacement 4.4 L
Fuel / Induction Turbo Diesel
Factory power 331 kW (450 HP)
ECU manufacturer Bosch
ECU hardware 0261S02215
Calibration stage Stage 2
Cylinder capacity 5204 CC
Compression ratio 12,5 : 1
Bore × Stroke 84,5 X 92,8 mm
OEM engine code BSM
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.

Engine5.2 FSI V10 450hp CodeBSM Displacement5.2L Capacity5204 CC Compression12,5 : 1 Bore × Stroke84,5 X 92,8 mm FuelPetrol Engine ID#736
Stage Power Torque Δ HP Δ Nm
Original / Factory 450 HP 540 Nm — —
Stage 1 475 HP 565 Nm +25 (5.6%) +25
Stage 2 504 HP 593 Nm +54 (12%) +53
Stage 3 743 HP 837 Nm +293 (65.1%) +297
Stage 4 878 HP 999 Nm +428 (95.1%) +459
Fuel economy gain (vs. factory map, same driving profile): combined cycle −8% , full-load cruise −12%. Diesel calibrations typically net bigger combined-cycle savings thanks to shorter duty-cycle on low-load driving.

About this calibration file

The Stage 2 calibration for the 2009 Audi S8 4.4L Turbo Diesel is written for vehicles with supporting bolt-ons: a higher-flow downpipe or sports catalyst, upgraded intercooler and upgraded intake are recommended. Boost targets, fuel-rail pressure, injector duration and VGT positioning are pushed further than a Stage 1 map while keeping exhaust-gas temperatures inside safe bands.

This file matches a Bosch ECU with hardware number 0261S02215. 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: 504 HP and 593 Nm at the crank — a gain of +54 HP (12%) and +53 Nm over the factory 450 HP / 540 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

The file is written for the exact ECU hardware 0261S02215 (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.

Stage 2 benefits from a higher-flow downpipe or sports catalyst, an upgraded intercooler on forced-induction engines, and in some cases a cooler intake. The map will run on stock hardware but will not reach the quoted figures without the supporting bolt-ons.

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 2009 Audi S8 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. Immediately after payment clears (typically < 30 seconds on Stripe / PayPal), the download link appears in your account dashboard and is also emailed to you. The link is a signed, expiring URL — download it within 24 hours; if it expires, just re-generate from the dashboard at any time.

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.

This product contains a calibrated Stage2 tuning file for Audi S8 4.4 FSI 2009 Turbodiesel 331KW with Bosch 0261S02215 and software ID 4E0907552 (Bosch software number 387929 ( 1037387929 )). The base stock vehicle for this calibration has a factory output of around 331 kW (~450 HP). Stage 2 is intended for cars with supporting modifications (exhaust, intake, intercooler) and delivers a stronger performance gain.

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 0261S02215, 4E0907552, 387929 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.

SHA-256 fingerprintC5E44325 72D77405 188697CA DEF83C87 DC8DD373 2B9E02EC 610E63C9 34109B89

Same engine — other calibrations

Alternative stages for the same ECU: Audi family