SOURCE: 2003 bmw 525i
If the brake lights are really on (?) this represents about a 4-5 ampere drain that would drag down most batteries in less than a day. (Could be over 100 ampere/hours.)
I don't know your car but brake lights can be controlled by a switch operated by the pedal suspension or a pressure switch that monitors hydraulic pressure in the braking circuit.
If your brake lights are on, the switch that controls them has failed or a relay that is operated by the switch.
If the car seems sluggish or pulls when driven, it could be a failure in the ABS circuit since that is a high-demand (normally intermittant) load.
The best way to locate the problem would be to monitor the current drain with a meter in series from the battery (engine off, monitor the ground side) and pull and replace fuses one-by-one to see which circuit is the culprit.
SOURCE: 1990 525i bmw headlights
Check the wiring in the lights it may be poor construction or mis care that has madr a wire become looseand only rarely turn on
SOURCE: 2002 BMW 330XI, high beams do not come on fully
check fuse and relay, if its good, than you have faulty switch, only work on low but not high beam, to turn high beam on the switch move forward which is fauty or no contact, flashing high beam move toward you which has a good contact and working. it two switch in one unit.
SOURCE: can 2008 BMW 528i ignition coils be used for 2003 BMW 525i
i would not interchange parts.it best to replace original parts.dont matter if coils look the same.still buy the original coils.2003 to 2008 is a 3 year difference.
SOURCE: hi i have BMW 525i 2004 from time to time when
hello there no meter in this car right i have the same car , plz reply
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