BMW Technical Database

BMW ECU and Transmission

Technical reference for tuners and workshops. Identify BMW ECU platforms, understand reading methods, explore transmission calibration options and find the information you need for professional file service requests.

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Browse BMW ECU Families

Bosch MG1 (DME8)

Current-generation petrol ECU for B48, B58 and S58 platforms.

Bosch MEVD17

Mature petrol ECU for N20, N55, S55 and selected N63/S63 applications.

Siemens MSD8x

Continental/Siemens DME for N54, N63 and S63 platforms.

Bosch MD1 (Diesel)

Current-generation diesel ECU for B47 and B57 engines.

Bosch EDC17 (Diesel)

Previous-generation diesel ECU for N47, N57 and early B47 applications.

MG1CS221 / DME9

Next-generation ECU for S68 applications — vehicle-specific assessment required.

Explore All BMW ECUs

Browse BMW Transmissions

ZF 8HP

The dominant BMW automatic. 8HP45, 8HP50, 8HP70 and M-specific variants.

BMW DCT

M-DCT dual-clutch transmissions fitted to M2, M3 and M4 models.

Explore All BMW Transmissions

Technical Tools

ECU Identification

How to read the DME label and determine the correct ECU variant.

OBD vs Bench vs Boot

Compare the three reading methods and choose the right one for your ECU.

Original ECU Files

Why a clean original read matters and how to verify file integrity.

For Professional File Requests

A complete file service request requires accurate vehicle and ECU identification. Before submitting through the portal, gather the following information:

BMW model, year and VIN
Engine code and variant
ECU or TCU part number and software version
Reading method used (OBD, bench or boot)
Complete, unmodified original ECU file
Current hardware modifications (if any)

Open File Service Portal

Related Sections

BMW Engines

Browse by engine or model.

BMW Tuning Guides

Stage guides, calibration and learning.

BMW File Service

Professional ECU file service.