5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
As far as the speakers go; do you have the factory headunit or a aftermarket? If it's stock, either the headunit or the amplifier in the trunk are going bad; if aftermarket, then the amp is most likely not there, and the wires were just hooked to each others in the trunk and got loose.
Either way, check the plug on the back of the headunit, and the plug/wiring behind the carpet on the left side of the trunk.
If you think you need a new factory amplifier, I have 2 ... 25 dollars shipped (Blaupaunkt and another which just says BMW), your choice.
If it is the factory amp, make sure to check ALL the speakers, especially the left side speakers, one or more may be bad. What happens is one speaker can go bad, and then take out the factory amplifier with it. In hooking up a new amp, it can go bad as soon as you turn it on, if the bad speaker(s) is(are) not dealt with.
I replaced my stock speakers 5 + years ago and they were in pretty poor condition then. Add in the bass-heavy music that is on the air now, it just decreases the lifespan a lot. Those stock 5.25"ers cant handle very much bass, theyre just not designed for it. I'll put my money on the 14 year old speakers. (Psst, Torque...get one of those amps packed up and ready to go, he'll need it too)
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