Stage 1
Stage 1 · Petrol · 340i 326hp
BMW E36 M3 Stage 1 file Siemens
BMW E36 M3 Petrol 236 kW (321 HP) Stage 12004, Petrol, 236 kW (321 hp)
326 → 400 HP +74 HP +130 Nm 23% more power
Calibrated ECU file . Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 340i 326hp, B58B30A, 3L, Petrol. Engine #909 in our gains database.
- Power
- 400 HP+74 HP from 326
- Torque
- 580 Nm+130 Nm from 450
- 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 Siemens.
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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, 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 | BMW |
|---|---|
| Vehicle model | E36 M3 |
| Model year | 2004 |
| Fuel / Induction | Petrol |
| Factory power | 236 kW (321 HP) |
| ECU manufacturer | Siemens |
| Calibration stage | Stage 1 |
| OEM engine code | B58B30A |
| 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 | 326 HP | 450 Nm | — | — |
| Stage 1 | 400 HP | 580 Nm | +74 (22.7%) | +130 |
| Stage 2 | 420 HP | 620 Nm | +94 (28.8%) | +170 |
| Stage 3 | 538 HP | 698 Nm | +212 (65%) | +248 |
| Stage 4 | 636 HP | 833 Nm | +310 (95.1%) | +383 |
About this calibration file
The Stage 1 calibration for the 2004 BMW E36 M3 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 Siemens ECU. 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: 400 HP and 580 Nm at the crank — a gain of +74 HP (23%) and +130 Nm over the factory 326 HP / 450 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
Product details
This product contains a calibrated Stage1 tuning file for BMW E36 M3 2004 Benzin 236KW with Siemens Siemens. The base stock vehicle for this calibration has a factory output of around 236 kW (~321 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 Siemens. Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
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