5 Series :: 1991 525i Not Starting - Battery Draining


Feb 10, 2010

We got the car a couple days ago. It was running fine then, although suspiciously the guy we bought it from had it running when we got there, leading me to believe he knew about the problem already and didn't want us to. The problem is that after my dad drove it to work yesterday, he tried to start it up at lunch and it wouldn't start. It didn't sound like the starter was trying at all, just a bunch of electronic clicks. However, the electronics all work, dash lights, headlights, locks, etc. It just doesn't seem to be able to start up.

When we took it to a shop for an unrelated issue, a mechanic said there were wires hanging down in the trunk for a sub, and we knew this but thought it was no big deal. He told us that if it was wired wrong, it could be draining the battery, even without being hooked up to a sub. I checked the battery, and there were a few extra wires hanging off the negative terminal. However, that doesn't make sense to me, how could a couple of wires attached to just the negative terminal do anything?

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5 Series :: 1991 BMW 525i Electrical System Shut Down

Recently, the cars electrical system shut down. The central locking system, the windows, seat adjustments, interior lights and the radio quit operating. The A/C, outside mirrors, driving lights & ignition remained operative.

Removing the electrical modules in the engine compartment & re-seating them reset the system. Then the same issue recurred. Re-seating the modules did not resolve this the second time. Only when the modules under the rear seat were removed and re-installed did the systems start again. Which module is defective?

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BMW - 535 :: 2008 - Battery Is Draining?

I just bought a 2008 BMW 535ia. I owned it four days before the battery died. I went back to the dealer I bought from and he told me that it was my fault -- I didn't drive the car enough. Said due to "advanced electronics" car has to be driven for at least 30 minutes each and every time other wise battery will continue to drain.

I work at home so I only drive the car three or four days a week,mostly for a 10 minute trip to town. I'm afraid to take this car anywhere. For me, luxury now means having a car that you know will start.

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I own an 89 jag xj6. Something seems to be draining the battery. It can start fine in the evening but by the next morning its dead. If it sets too long its completely dead.. nothing... The alternator appears to be charging, after running it awhile it will start again. I put a new battery in it several months ago. The former owner said something about it maybe being a switch of some sort that has something to do with the climate control system?

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I am new to the R32 but I have a 2nd owner 60k 2004. The battery keeps draining, put the new one in and it was good for a day. If you jump it, it will work for about 2days and then it is drained down to 3 to 4 volts. No lights or readout on gauges. I am stumped.

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Recently, mostly today, i noticed the battery has been draining quite fast. I was at 2 bars from full(or 3? whatever is pre "green") and probably 5-10min later i was 2 bars and the gas engine was running. Whatever seemed odd, maybe the traffic was a little slower today.

However i started driving 80kph and it took over 5 minutes for the car , without battery running, to bump from 5 bars up to 6. The electric motor was literally not driving the whole time, it was strictly gas the whole 5 min.

I was also considering taking this car for an inspection at the dealer just to ensure everything is okay before winter hits.

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I have noticed that corrosion tends to build up on her positive battery terminal very quickly and I suspect she's getting some drain due to that but I'm stymied as to why it happens. The only thing (and its a stretch) that I can think of is she has a habit that her father taught her of cranking the heat, the defroster AND the A/C in her car when it's cold out. Normally I wouldn't think this would make a difference but I wonder if there is somehow condensation developing in that tiny little Civic engine bay as a result?

I've asked her not to do it and see if the situation improves but old habits die hard. The battery does tend to come up dead (of course) more in the winter but it's not an exclusively cold weather situation. Anyway, after jumping her car in single digits this morning before dawn I am ready to admit defeat and just get a new battery but figured I'd throw it out to the many voices here.

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I have to jump the car about once a week. I called the dealer and they said the radios for this year and model are known to be faulty but the fix is expensive and we cannot afford it. I'm pretty handy but not so much with stereo/ electronics. If there is a fix out there, I am willing to try it.

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Plugged = dead battery...

Unplugged = good battery...

I'm getting ready to rip the damn thing off the engine and calling it a day, but that would defeat the purpose of me buying a new compressor.

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