Stage 3
Stage 3 · Diesel · 325D 197hp
BMW E90-E91 325D Stage 3 file Bosch · SW 500774
BMW E90-E91 325D Turbo Diesel 145 kW (197 HP) Stage 32006, Turbo diesel, 145 kW (197 hp)
197 → 296 HP +99 HP +220 Nm 50% more power
Calibrated ECU file for (SW 500774). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 325D 197hp, 306D3, Diesel. Engine #9458 in our gains database.
- Power
- 296 HP+99 HP from 197
- Torque
- 620 Nm+220 Nm from 400
- 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 O and software 500774.
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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 3, Diesel.
Hardware
- Hybrid or larger turbocharger
- Upgraded injectors (matched flow rate)
- 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 | BMW |
|---|---|
| Vehicle model | E90 E91 325d |
| Model year | 2006 |
| Fuel / Induction | Turbo Diesel |
| Factory power | 145 kW (197 HP) |
| ECU manufacturer | Bosch |
| ECU hardware | 31JAE5 |
| ECU software | 500774 |
| Calibration stage | Stage 3 |
| OEM engine code | 306D3 |
| 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 | 197 HP | 400 Nm | — | — |
| Stage 1 | 233 HP | 490 Nm | +36 (18.3%) | +90 |
| Stage 2 | 280 HP | 588 Nm | +83 (42.1%) | +188 |
| Stage 3 | 296 HP | 620 Nm | +99 (50.3%) | +220 |
| Stage 4 | 355 HP | 740 Nm | +158 (80.2%) | +340 |
About this calibration file
The Stage 3 calibration for the 2006 BMW E90 E91 325d Turbo Diesel 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 31JAE5 and software version 500774. 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: 296 HP and 620 Nm at the crank — a gain of +99 HP (50%) and +220 Nm over the factory 197 HP / 400 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
31JAE5 (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 Stage3 tuning file for BMW E90-E91 325D 2006 Turbodiesel 145KW with Bosch O and software ID 31JAE5 (Bosch software number 500774 ( 1037500774 )). The base stock vehicle for this calibration has a factory output of around 145 kW (~197 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 O, 31JAE5, 500774 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
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