Originally Posted by Dado 540
I have replaced the battery 2 years ago. Haven't had any problems,but im gonna have to check it. E39 are sensitive to the battery that is not fully charged.
Im reading up on this on other forums and people are suggesting General Module, Voltage Regulator, Alternator, Battery...
I forgot to mention that RPMs tend to dip on a rare occation.
I had the exact same symptoms. In my case the problem was alternator. I however let it continue with these symptoms for too long and it in turn killed my battery too... although my battery was original if I am not mistaken - 6 years old.
2015 M5 Competition+Ultimate Package black sapphire on champagne
2003 540i/6 black sapphire on black
BBS RG-R, CDV, Dinan Exhaust, Dinan RSB, Dinan RSTB, Dinan SSK, Dinan FSTB, Dinan CAI, Dinan TB, Dinan MAF, Dinan stage 4 software
BMW 13th gen ULF Bluetooth, BMW Sirius, Dice Silverline iPod
Dynocom numbers: 320HP, 420LB.FT TQ (crank)