what model year is this vehicle?
water on the electronics can cause all sorts or bizarre issues, so it is possible that this was your problem all along
I am surprised that your garage could not diagnose this.
As far as advise, if it was a main dealer doing the work, I would involve BMW customer service and complain and complain and complain to whoever will listen and run the issue up the chain as far as possible. The more you complain, the more likely you are to get something from them.
You can also complain to the management chain at the dealer.
If it was a non dealer or non certified by BMW garage, then all you can do is complain to the management there.
your best bet is if it was a main dealer, to complain to BMW. They don't like it when a customer gets the runaround and poor service like this from a dealer.
Sorry if you were hoping for a different answer, please don't shoot the messenger - I can only give the honest answer, which I have. Please remember that a low rating PUNISHES me for my honest and prompt response, and I receive nothing for my time and answer until a positive rating is clicked.Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.
this is the question you asked:
"my question is, just how much damaged has this done, and could this have been the problem along, since I bought the vehical. Any advise would be good, many thank you,"
this does not request technical answers. I did my best to answer what was posted
what technical answers do you want?
please post images and the part numbers if possible from the wet items.
please list out the part numbers of the wet items here.
you can send pictures to support at justanswer.com and reference this question, they will forward them to me
I will review the photos when they are relayed to me. In the meantime, it would be very helpful if you can call the garage and ask them to confirm which "control unit" they are referring to and what its part number is.
overall, if anything gets wet, it needs to be replaced. And, these cars are very sensitive to voltage fluctuations, so, if the battery electronics were wet, this could very easily cause voltage issues and signal interruptions, which can set off all kinds of random warnings.
the images have not been relayed to me.
if you wish, you can try to post the images to a photo sharing site and then post the link to the images here.
a photo sharing site is a site where you post images or files to share with friends or to back them up
I have received your files
this does not change my answer
any wet modules will need to be replaced
if they were wet, they could have easily set off phony warnings since this will cause internal shorts and cause them to sense signals and faults that are not present, and can interrupt power distribution - this in itself can cause other systems to set off phony warnings.
please let me know if you require further information, otherwise please select a positive rating, thank you