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I have a 2003 745 and the vehicle will not respond to the key at all. I tried both keys and nothing. I went outside because my wife heard an alarm going off so I wanted to see if it was my alarm. When I tried my keys they would not respond. I opened the car with the manual key and the car would not accept my fobs and I can't even open the trunk. Any idea what could be going on???

Submitted: 92 days and 22 hours ago.

Category: BMW

Value: $20

Status: AWAITING CUSTOMER ACTION

Posted by jacob 92 days and 21 hours ago.

Answer

Hello,
It sounds like the battery has been completly discharged.
The alarm and or interior lights may have been on for some time.
In either case this will keep the rest of the computers in the vehicle from entering a sleep mode. This causes the battery to be discharged at an accelerated rate.
I would try charging the battery or jumping it under the hood.
You may then want to test or replace the battery and have the vehicle electrical system scanned to ensure something is not draining the battery. It possibly could be just a failed battery given the age of the vehicle,if it is the original one.
Thanks, Jacob.

92 days and 21 hours ago.

Reply

Where are the terminals located under the hood?

Posted by jacob 92 days and 21 hours ago.

Answer

The positive is toward the back of the engine compartment under a red plastic cover that is marked with a + and the negative should be a large stud next to it that is connected to the body.
Your owners manual should show you a picture of these locations.

92 days and 21 hours ago.

Reply

Unfortunately for me my manual is in the trunk and I can't open the trunk. I see the positive but i cannot find the negative to save my life. Is it marked negative??

Posted by jacob 92 days and 21 hours ago.

Answer

No, the negative is not marked. You can just hook it on one of the strut top studs. These are gray and in a cluster of three on each side. I can not exactly remember where the negative post is. Look along the side of the inner fender or around the strut towers.
Any good ground will work.

92 days and 21 hours ago.

Reply

Ok...I'll get back to you as soon as my wife is awake so that I can get her to hold the cables. I don't want to shock myself.

Accepted Answer

Thats hilarious.

Accepts:
Expert:	jacob
Pos. Feedback:	97.4 %
Answered:	8/22/2009

BMW Technician

Master BMW and Master ASE Certified

92 days and 20 hours ago.

Reply

LOL....i guess the alarm is what drained the battery....as soon as I hooked up the cables the alarm started going off again. Not sure what that was about. I turned it off and jumped the car. Thanks for your troubles my man. $20 for you!

Posted by jacob 92 days and 19 hours ago.

Answer

Great!
Be sure to have the battery tested.
Jacob.

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Where are the terminals located under the hood?

Answer

The positive is toward the back of the engine compartment under a red plastic cover that is marked with a + and the negative should be a large stud next to it that is connected to the body. Your owners manual should show you a picture of these locations.

Reply

Unfortunately for me my manual is in the trunk and I can't open the trunk. I see the positive but i cannot find the negative to save my life. Is it marked negative??

Answer

No, the negative is not marked. You can just hook it on one of the strut top studs. These are gray and in a cluster of three on each side. I can not exactly remember where the negative post is. Look along the side of the inner fender or around the strut towers. Any good ground will work.

Reply

Ok...I'll get back to you as soon as my wife is awake so that I can get her to hold the cables. I don't want to shock myself.

Accepted Answer

Thats hilarious.

Reply

LOL....i guess the alarm is what drained the battery....as soon as I hooked up the cables the alarm started going off again. Not sure what that was about. I turned it off and jumped the car. Thanks for your troubles my man. $20 for you!

Answer

Great! Be sure to have the battery tested. Jacob.

Related BMW Questions

The positive is toward the back of the engine compartment under a red plastic cover that is marked with a + and the negative should be a large stud next to it that is connected to the body.
Your owners manual should show you a picture of these locations.

No, the negative is not marked. You can just hook it on one of the strut top studs. These are gray and in a cluster of three on each side. I can not exactly remember where the negative post is. Look along the side of the inner fender or around the strut towers.
Any good ground will work.

Great!
Be sure to have the battery tested.
Jacob.