Electrical problems please help

I have a Bmw 325i coup (07 Plate) and I have the following problem with it and I hope that you can help me out?

All of the issues below have been happening over a period of about ten weeks…
A while ago I started to notice that the car clock started to show 00.00 when I got in to it (about once a week) I would reset it to the correct time and all was well for a week or so! I would also lose all pre-programmed setting I.e trip milage, average fuel consumption and seat settings.
Then after driving the car sort or long journey, once I stop the engine and got out to lock it the car with the remote the car would lock and the alarm would go off about ten times… During that time of the alarm going off, the remote wouldn't work to stop it from sounding after the alarm stopped sounding all would work ok, but still had to reset the settings as stated in bullet point 1
This didn't happen all the time about three times a week
One night I drove home and locked the car, and the next day the car was completely dead and I had to use the key to get in, once in nothing at all not a single light came on, Called green flag and he told me it was the battery and sold me a new one… all was fine for about four weeks and the issues on bullet points 1 and 2 stared to happen again.
Just before christmas (20t Dec) I drove about half a mile up the road and parked the car up for about a hour when I returned to the car it was completely dead no power not even the hazards worked. Called green Flag and had the car towed home, no power in the car at all nothing worked at all!!
The next day I came home in my partners car and notice that the cars alarm LED was flashing… I got my keys and pressed the button to unlock it.. To my amazement the locks popped up, put the fob in the hole and the car started straight away…
I haven't got the confidence to drive the car and need it fixing asap. (it has started everyday since)
On the last time the car stopped working I unscrewed the panel under the glovebox and discounted a blue multiway connector block, after ten seconds I reconnected the block and heard relays click and the car started first time since then the cars has had the same issue.
I actually believe it could be a faulty main relay or an intelligent battery switch (IBS) that is the cause of all my problems!

P.s Just thought I would mention this, on one occasion of the car not working, I hit the dashboard and heard a noise and all the electrics came on!! And the car started!!

just an update i have had the car in at two bmw garages now and they run all the test and cant find a fault!!!

any thoughts please help

Has anyone tested the battery? Since this is an 07, I'll assume it's your original battery... If so, I would first replace it.

//Brew

Hi Brew thanks for response, i have had a new battery fitted and it has been registered to the car? the car is bmw now and they cant find a fault!! any more ideas would be greatly received
cheers KB

Originally Posted by keith2416

Just thought I would mention this, on one occasion of the car not working, I hit the dashboard and heard a noise and all the electrics came on!! And the car started!!

just an update i have had the car in at two bmw garages now and they run all the test and cant find a fault!!!

Your car is home to a Gremlin.

You need an electronics detective to exorcise the Imp!

Not so easy to find....or you might acquire the skill, necessity being what is it. Maybe you'll get lucky and, when the issue occurs, you wiggle connectors until the badness is found.

it is a mightmare im sure its a relay!! but which one?

Sounds like you have a short in a wire or lose wire.

mmm..... yeap it sure does

Originally Posted by keith2416

I have a Bmw 325i coup (07 Plate) and I have the following problem with it and I hope that you can help me out?

All of the issues below have been happening over a period of about ten weeks…..
A while ago I started to notice that the car clock started to show 00.00 when I got in to it (about once a week) I would reset it to the correct time and all was well for a week or so! I would also lose all pre-programmed setting I.e trip milage, average fuel consumption and seat settings.
Then after driving the car sort or long journey, once I stop the engine and got out to lock it the car with the remote the car would lock and the alarm would go off about ten times….. During that time of the alarm going off, the remote wouldn't work to stop it from sounding after the alarm stopped sounding all would work ok, but still had to reset the settings as stated in bullet point 1
This didn't happen all the time about three times a week
One night I drove home and locked the car, and the next day the car was completely dead and I had to use the key to get in, once in nothing at all not a single light came on, Called green flag and he told me it was the battery and sold me a new one….. all was fine for about four weeks and the issues on bullet points 1 and 2 stared to happen again.
Just before christmas (20t Dec) I drove about half a mile up the road and parked the car up for about a hour when I returned to the car it was completely dead no power not even the hazards worked. Called green Flag and had the car towed home, no power in the car at all nothing worked at all!!
The next day I came home in my partners car and notice that the cars alarm LED was flashing….. I got my keys and pressed the button to unlock it.. To my amazement the locks popped up, put the fob in the hole and the car started straight away…..
I haven't got the confidence to drive the car and need it fixing asap. (it has started everyday since)
On the last time the car stopped working I unscrewed the panel under the glovebox and discounted a blue multiway connector block, after ten seconds I reconnected the block and heard relays click and the car started first time since then the cars has had the same issue.
I actually believe it could be a faulty main relay or an intelligent battery switch (IBS) that is the cause of all my problems!

P.s Just thought I would mention this, on one occasion of the car not working, I hit the dashboard and heard a noise and all the electrics came on!! And the car started!!

just an update i have had the car in at two bmw garages now and they run all the test and cant find a fault!!!

any thoughts please help

The problems you've described are indicative of a discharged battery. Since you've replaced the battery it's unlikely (but still a possibility) the new battery is unable to hold a charge. Therefore I'd investigate if the charging system is at fault. Check to see if the charging system is generating sufficient power to operate the vehicle and charge the battery. Given the issue sounds intermittent even that test might be inconclusive. I'm thinking the most likely cause is a failing alternator.

i will check it out, i have tested the voltage with car not 12.65 and running 14.65 so not sure what is as the fault happens as and when it feels like! the thing that confuses me, is when i discount the blue multi-way adapter the car starts and all power is back! i think it is the general module or a main relay but which one is beyond me!! any more ideas?