Upgrade your BMW to the Siemens MS41.3 DME – a proven OEM ECU platform for M52 / S52 engines that’s ideal for swaps, repairs, and performance builds. MS41.3 offers stable factory drivability with modern flash/tuning support, making it a solid step up from earlier MS41 versions.
Key benefits of upgrading to MS41.3
• More tuning-friendly OEM ECU (better support for flashing, logging, calibration work)
• Great base for engine swaps (clean integration, reliable operation when correctly configured)
• Improved stability & compatibility compared to older MS41 revisions
• Keeps OEM manners (smooth idle, cold start behavior, daily drivability)
• Perfect for NA mods (headers, cams, intake) with proper calibration
Note: ECU type must match your engine and wiring. Coding / EWS alignment may be required depending on your setup.