Its a e46 2003 318ti compact. have changed the alternator but is still happening.
Has to b the battery,if you changed the alternator then the batter isnt supplying any power to your sensors and computer. if your battery is weak the car might run at idle, but as soon as your drive your useing more draw. swap out a battery from a friend and you should b good.
Testimonial: "thanks for that wphinney66 will give that a shot. and post results. :)"
HEY FELLA TURNED OUT TO BE THE CRANK SHAFT SENSOR BUT THANKS FOR YOU HELP MATE.
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SOURCE: battary light on , engine cut off car won't crank
sounds like it's your alternator, your alternator charges your battery and runs car once it is started. if you have a bad alternator your battery light will come on, and shortly after your vehicle will die, unable to restart without a jump. I would take your battery to autozone or an auto shop to have your battery and alternator tested.
SOURCE: 2002 BMW 318ti - engine keeps cutting out while driving
right have a check down your local garage if they do diagnostics be about 15-30 pound well worth it tells you a hell of alot more then wht i can say here but on e46s any lil prob tht asc light wil come up its warning you cars not right beware in other words. ive had it on rear abs sensors the asc light is just warning but have them plug it in to diagnostics tht will tell you all about it and whts going on prob sensor somewere let me no how you get on..
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