bmw 7 series starting problem help and advice PLEASE

[sean j g]

hi all i have just purchased a 2000 x registration bmw 728i but it wont start the previous owner lost the keys so he got a new key from bmw and they told him that this model did not have the chipped key but on trying to start the car when you unlock the doors it will not deactivate the alarm and the red led alarm light on the dash is flashing and the alarm siren sounds when you try to start nothing like it is immobilised my bmw dealership told me there is a button on the car which isolates the car from starting but they would not tell me where this is and that i would have to book it in with them for them to check it and being a main dealer i know i will get a bill for hundreds so any advice from you guys would be great also the battery on the car is flat so to sort this i have put jumper leads on the car to power the system could it just be the battery?anyone with any suggestions would be very appreciated thanks in advance cheers sean

[delboy735]

sean j g said:

hi all i have just purchased a 2000 x registration bmw 728i but it wont start the previous owner lost the keys so he got a new key from bmw and they told him that this model did not have the chipped key but on trying to start the car when you unlock the doors it will not deactivate the alarm and the red led alarm light on the dash is flashing and the alarm siren sounds when you try to start nothing like it is immobilised my bmw dealership told me there is a button on the car which isolates the car from starting but they would not tell me where this is and that i would have to book it in with them for them to check it and being a main dealer i know i will get a bill for hundreds so any advice from you guys would be great also the battery on the car is flat so to sort this i have put jumper leads on the car to power the system could it just be the battery?anyone with any suggestions would be very appreciated thanks in advance cheers sean

Get yourself across to www.the7seriesregister.co.uk

They are best equipped to help you out, and you will probably have an answer within hours.Good luck.

[miniman]

The seller has told you a load of bks IMHO. A 2000 7-series will definitely have a transponder key. Assuming your key has a transponder chip in it, you need to take the car to BMW to have it coded, or follow the instructions in the handbook although if you have no working keys I doubt you can do anything other than go to a dealer. If you don't have a transponder key, you will have to get one. >£100 normally I'm afraid.

ETA: see here: http://www.meeknet.co.uk/E38/Key/Index.htm

Edited by miniman on Sunday 1st February 12:06

[< FORZA WEST]

if u have a brand new key turn the ignition (p2) on for 20+ seconds, the EWS will roll the codes around to align with the key...if all is well with EWS then the 7 will start after the time has elapsed. no coding is required unless there is a problem with either DME or EWS

Depending to the shape remote key you have there is a sequence to initialise it for the remote locking PM for this

[sean j g]

hi all thanks for all your input,advice and help i now have some more info if anyone can help i would be very gratefull as said before a new key was ordered from bmw which bmw have said will start the car but upon trying it will not start i bought the car through auction and have now found out that the car was lifted by the dvla for no tax etc when i say lifted i mean actually cradled in the air and put on the back of a recovery lorry so bmw are now saying there is a button located on the car which will need to be reset but they wont tell me where it is located other than it is under the car somewhere and want £50 to book the car in and a further £47 per hour on top which seems a hell of a lot to push a button when trying to start the car i unlock to doors and open the drivers door and a bleeping sound starts straight away also the led light on the dash flashes and the outside hazard lights flash i turn the key in the ignition and everything on the dash lights up but the car will not crank over neither do the lights on the dash dim so it must be a safety cut of switch please please can anyone help thanks in advance for any help or advice cheers sean