Siemens MSV70

The Siemens MSV70 is basically an MS45.1 with added Valvetronic support for the N52 engine. It has a pretty similar brother ECU, the MSS70 which powers the S54 in E85/E86 cars.

Flashing software

1. Bimmer Tuning Tools MS45 Quickflash Fully working flasher for MS45 that can write and read partials and full tunes. It can also delete EWS, do logging, read/clear DTCs/adaptations among many other things. And best part is that it works with standard OBDII-to-USB adapter with FTDI chip. https://www.bimmertuningtools.com/product/ms45-quickflash/
2. MS45 Flasher by hassmaschine & TerraPhantm: see here for information: https://forum.e46fanatics.com/showthread.php?t=1248513
3. BDM - Requires you to remove the DME from the car and have a bench setup with a laptop. The BDM100 uses a connector that is soldered to a BDM port on the back of the DME and will grant you full access to all of the onboard flash in the DME. Each time you flash a new tune to your car, you'll have to remove your DME, put it on the bench, flash it, and then reinstall in the car. Not very practical, and best used if you are going to begin deep disassembly of the DME, and at that point you dont need this wiki :)