KJM

Finally cracked the problem!! It turned out to be a faulty alternator as we established that there was nothing wrong with the battery. Replaced it and battery now fully charged and holding charge. All fault codes reset and staying off! Thank you for all the replies. This is a fantastic and very helpful forum Best, Karl

Hi all, Thank you for all the replies. I took it in to get the battery checked as its still under warranty and there's nothing wrong with the battery (and the alternator is producing the correct current) Issue seems to be, with the freezing weather recently, there was a build up of moisture in the area below the battery in the boot. Mechanic says he thinks the charge coming from the alternator is not all reaching the battery. There is a control unit next to the battery he says he thinks is wet/damp. He's going to take it all out tomorrow and report back. I have put towels and paper towels down there to absorb as much as possible overnight. I let you all know what we find tomorrow

Fantastic advice many thanks Dave I checked the battery yesterday and it was around 11 so definitely an issue there. I have put it on drip charge and will try and get it back up to correct levels. Its a relatively new battery so maybe its just the cold weather - although did drive the car 100 miles to Somerset and back over the weekend so would have thought it would be fully charged. Potentially that suggests an alternator problem? Thanks again Karl

Morning All, I have a 2004 645ci that only has 50k mileage on it and is in generally very good condition. (I drove it to Germany last summer without any issues) Recently though I have been getting a host of error messages flash up (Dynamic Drive fault, power steering etc) When this happens I lose power steering and gearbox becomes very clunky and wont change above 3rd (this happens soon after start-up) I have had all these errors cleared with a local mechanic but looking for a specialist to diagnose whats causing it and maybe it needs its "brain" replaced as I hear this is a common problem in these older cars where the tech was very new at the time. Many Thanks Karl