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TunerPro have a bunch of xdf's (definition files for tunes) for the Motronics as well as binary reads of the tunes - might be worth poking in to: https://www.tunerpro.net/downloadBinDefs.htm#BMW

Yeah absolutely. I was going to reply to your thread when I got a chance. The key thing is to figure out what processor your ECU runs - I think you're Motronic 1.0 right which is some derivative of the Intel 8051 I believe. Ghidra has def files for the 8051 I believe so you might be in luck. The second thing which is really needed is some sort of definition file which describes the locations in memory of parameters, etc. so you've got something to start with. From there it's a case of loading in Ghidra, trying to find code blocks, data blocks, etc. In terms of other tools it's pretty much just been Excel, TextEdit, and the like. Do you have a read of the program ROM from your ECU?

@Karter16 If you could share tooling and setup you have for this reverse engineering work that would be appreciated. If I recall correctly you use Ghidra for reverse engineering the code. But what other tools are you using in the process?

Price seems realistic though - or maybe I have just been conditioned 😂

Took out the gap with H&R Springs & BMS Wheel Spacers.

241,000km Had noticed an intermittent fuel smell after giving it some jandel over the last month. Had taken the beauty cover off to expose the fuel rail to keep and eye on the injectors to see if they were the culprit but there was nothing obvious. Then I had a misfire the other morning on cold start which went away pretty quickly but it was enough to motivate me to look abit harder. When it came time to wrestle the fuel rail off it just came right out, I didn’t even touch the quick release connector…thought that was a bit odd. Anyway while I was there I swapped the injectors out for some second hand ones I had blasted some carb cleaner though using an AliExpress ghetto setup and an old 12 Volt battery. I might get my original ones cleaned at some point and put them back in but will see how these other ones go for a while first. Pretty sure my issue was the fuel rail feed line somehow being loose, not the injectors. got a very audible click from the fuel line when I plugged it back in. I did have a rogue vac line that I couldn’t figure out where it had popped off from as it went from the vacuume resovoir into the manifold but the only uncapped port was the little top one and this hose was quite big. Can’t see anything at the back of the manifold so I ended up swapping a few of the hoses over that seemed to fit the hole diameters better, not sure if I’m wreaking havoc here but it all seems to be working ok. The O2 pilot mod is now taking vacuum from the top port and the bottom capped off port is now supplying vac to the resovoir which feeds to the exhaust flap. I didn’t realise but OBD fusion hooks up to the vepeak scanner giving me some live PIDs which is pretty cool. Be even cooler if they were within spec. I also got a bike rack this week which is an older legit BMW one. It’s the same as the Thule 591 models but has this little fin at the back. Had to drive to Eastbourne to pick it up but it was a good chance to do some motorway pulls and check for any fuel leaks, trigger any misfires etc. looking forward to getting out on the bike with the kids now I can take mine too. Might need to trim this tree, although might alert me that i have a bike on the roof and to not try drive into the garage.