You’ll have to check amp draw on the starter, it may be bad ornaolenoid has quit. All auto parts stores have a little hand held machine to check this but I’m not sure if they’ll let you borrow it to take it home, if the car can’t make it rob the store.
SOURCE: 2003 BMW 325xi won't start, dashboard and radio go on.
My 2003 325xi died on the highway a few weeks ago, and I thought it was the battery. It turned out to be the alternator, which was an expensive problem to repair. If your battery is new, it could be the alternator, or a problem with the electrical system. I find the BMWs to be too complicated electrically, which often leads to problems! I'd check your alternator...
SOURCE: E46 330d sport, manual, 2003
This is likely having to do with the starting circuit. Have the glow plugs and circuit tested. The glow plugs can easily be tetsed for "proof positive" failure. Let me know what else I can do. Great little cars.
SOURCE: I changed the key batteries
stick the key in the ignition, turn it to the on position, remove it within 5 seconds, then hold the unlock button down and press the lock button 3 times within 10 seconds and release both buttons. The doors should lock/unlock to give you confirmation and your key should work.
SOURCE: 1994 BMW 740i with 222,000
Hi.
If it does turn over and electrical works, then the problem is unlikely the battery. You can try jump starting. If it cranks when jump-starting it may be a weak battery, starter motor or alternator, but I don't think that this is the problem.
Check if there is spark on all cylinders. Do a code scanning (this car is OBD1, you will need to do the scan at the dealer place or to find a BMW OBD1 tool- Universal OBD2 scanner will not work on a 1994 BMW). If the codes return misfire or mixture related errors check fuel pressure, check sensors and parts that determine the mixture (MAF/MAP, AIT, O2 sensors, IAC and EGR system), check the vacuum system for leaks and check the crank sensor.
Regards.
Ginko
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