Original file
Original / Factory · Diesel · 525D 163hp
BMW E39 525D original file Bosch · SW 090799
BMW E39 525D Turbo Diesel 119.9 kW (163 HP) Original2001, Turbo diesel, 119.9 kW (163 hp)
163 HP Factory calibration Stock backup file, 350 Nm, Diesel
Calibrated ECU file for (SW 090799). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 525D 163hp, 256D1, 2.5L, Diesel. Engine #960 in our gains database.
- Power
- 163 HPfactory calibration
- Torque
- 350 Nmfactory calibration
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 software 351761.
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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: Factory, Diesel.
Hardware
- Factory hardware: no modifications required
Software / calibration
- OEM calibration restored (recovery / immobiliser / coding work)
Original files are used to revert to factory state, repair after a faulty tune, or recover an ECU before service work.
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 | E39 525d |
| Model year | 2001 |
| Fuel / Induction | Turbo Diesel |
| Factory power | 119.9 kW (163 HP) |
| ECU manufacturer | Bosch |
| ECU software | 090799 |
| Calibration stage | Original (Factory) |
| Cylinder capacity | 2497 CC |
| Compression ratio | 17,5 : 1 |
| Bore × Stroke | 80,0 X 82,8 mm |
| OEM engine code | 256D1 |
| 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 | 163 HP | 350 Nm | — | — |
| Stage 1 | 195 HP | 430 Nm | +32 (19.6%) | +80 |
| Stage 2 | 231 HP | 514 Nm | +68 (41.7%) | +164 |
| Stage 3 | 245 HP | 543 Nm | +82 (50.3%) | +193 |
| Stage 4 | 293 HP | 648 Nm | +130 (79.8%) | +298 |
About this calibration file
This is the factory (original) ECU calibration for the 2001 BMW E39 525d Turbo Diesel, extracted from a genuine stock control unit. Use it as a verified backup before flashing any performance tune, or as a reference when recovering an ECU from a failed write.
This file matches a Bosch ECU and software version 090799. 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.
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 complete original ECU backup (stock file) for BMW E39 525D 2001 Turbo-Diesel 119.9KW with Bosch 0 (Bosch software number 351761 ( 1037351761 )). This original file corresponds to a factory engine output of approximately 119.9 kW (~163 HP). This file is ideal for ECU cloning, restoring the car back to stock and using it as a safe base for future remaps.
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 0, 351761 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
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