Bmw
 

I baught a BMW 1986 325i manual the car is great they only problem with it it drain battery fast anyone know how to fix that. The technician said there is electrical problem but he don't know what it is. thanx for your help.

check the fluids in the battery... other then that i couldnt tell you without looking

I'm clueless when it comes to cars, but isn't there something that charges the battery when you are driving? Maybe something is wrong with that part.

The alternator. Yah it might be a good idea to get that checked out and make sure it is functioning properly.