STAGE 1 Petrol 1.8i 20v 125hp

Audi A3 1.8 20V Petrol 91.9 kW (125 HP) Stage 1

04080120 1000200030004000500060007000 135 HP +10 190 Nm +20 HP Nm RPM 060120180
Stock Stage 1 HP / Nm projection
125 135 HP
+10 HP +20 Nm 8% 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 #230 · Gains DB
MATCHED ENGINE 1.8i 20v 125hp APG 1.8L Petrol Stage 1
04080120 1000200030004000500060007000 135 HP +10 190 Nm +20 HP Nm RPM 060120180
Stock Stage 1 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 1 · Petrol
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 A3
Model year 2000
Displacement 1.8 L
Fuel / Induction Petrol
Factory power 91.9 kW (125 HP)
ECU manufacturer Bosch
ECU hardware 0261204965
Calibration stage Stage 1
Cylinder capacity 1781 CC
Compression ratio 10,3 : 1
Bore × Stroke 81,0 X 86,4 mm
OEM engine code APG
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.

Engine1.8i 20v 125hp CodeAPG Displacement1.8L Capacity1781 CC Compression10,3 : 1 Bore × Stroke81,0 X 86,4 mm FuelPetrol Engine ID#230
Stage Power Torque Δ HP Δ Nm
Original / Factory 125 HP 170 Nm — —
Stage 1 135 HP 190 Nm +10 (8%) +20
Stage 2 143 HP 200 Nm +18 (14.4%) +30
Stage 3 206 HP 264 Nm +81 (64.8%) +94
Stage 4 244 HP 315 Nm +119 (95.2%) +145
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 1 calibration for the 2000 Audi A3 1.8L 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 0261204965. 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: 135 HP and 190 Nm at the crank — a gain of +10 HP (8%) and +20 Nm over the factory 125 HP / 170 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 0261204965 (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.

No. Stage 1 is explicitly a stock-hardware tune — no turbo, injector, fuel-pump, intercooler or exhaust changes are required. The only prerequisite is a mechanically healthy engine with good compression, clean EGR/DPF state, and fresh service fluids.

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 2000 Audi A3 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 Stage1 tuning file for Audi A3 1.8 20V 2000 Benzin 91.9KW with Bosch 0261204965 and software ID 8D1906018 (Bosch software number 354098 ( 1037354098 )). The base stock vehicle for this calibration has a factory output of around 91.9 kW (~125 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 0261204965, 8D1906018, 354098 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.

SHA-256 fingerprintE72A2CD8 C0745645 E33EDC35 4C9720AC 7110CC99 C6C56333 FF6B6AD3 29B7B8AB

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