I have a 2007 650 BMW I sometimes the car doesnt start without a few attempts...then computer says there's a transmission malfunction..drive moderately. When I turn off the car and then restart it the warning...service engine soon.,.goes away and the car drives normal. Then few days later it doesnt start again and the same problem reoccurs. Any advice out there?

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..

SOURCE: May have fried bmw computer chip, how do I know?

I would have the battery tested.... and the charging system as well

SOURCE: service engine soon light comes on sometimes bmw 530i 2003

my service engine ligth came on then it went of

SOURCE: 2000 bmw 323i-shakes and clanking

hey man, i had the same problem with my 325i (clankins sound on cold start-up) i took it to the dealership to have a look they diagnosed it wrong telling me a pulley is cracked and quoted me a ridiculous amount to fix it so, i decided to have a look 4 myself and i found that a pulley was loose the pulley looks similar to that of a cog of a bike it has 1 bolt in the center, that bolt was loose so all i did was tighten it and it solved the clanking sound , give it a shot it might work for you.

SOURCE: asc light comes on and engine cuts out

When your ASC light is on this is to let you know your Automatic Stability Control system is switched off press the ASC button Till light is off /ASC is on this works with your rev limiter and should stabilized your idle. If the problem persists have your throttle control unit checked as thi can trigger the ASC light as well and may also activate the ABS light if not fixed