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What could be the problem on a 1993 730 BMW after you change the battery it still wont start without a jump?
Wiki User
∙ 11y ago
The problem could be a number of things. One is that the new battery you installed is faulty and you would need a new battery. i would have a professional check your battery, starting and charging components on your car and make sure they are within spec. If they are all good then I would check for a battery draw on the car. This can be an extremely difficult and expensive problem to find; Suggest having certified BMW service done at this point. Make sure you have all aftermarket electrical stuff disconnected: no aftermarket radio, buzz detectors, nothing, not even anything in your cigarette lighter.
Wiki User
∙ 9y ago
Wiki User
∙ 11y agoIf it starts with a jump, then it is obvious the problem is with the battery. Or, if it started with the new battery at first and then will not start later on without a jump, your alternator is defective.
If the battery is fully charged and the positive and negative cables are good, it's possible that the starter motor is bad.
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