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If all windows stop workin at once it's a relay .. That can be found under your steering wheel after you remove the panel... This relay you gotta get it at a dealership if your local auto zone don't got it... Its called a comfort relay or a power window relay... Might be blue or gray.. Call the dealership tell them to transfer your call to parts then ask away on your realay... Remove it and give them the part number theres 1 or 2 numbers on it if im correct its the longer numbers you give to them... Make sure when they pull it up on there computer its the right 1... For power Windows .. And if you got a sunroof it'll be for that too. Depends on your model Bmw.. Well good luck and Hope this helps...
if both windows went at the same time it could be your comfort relay, i think the sunroof is on a different relay, taking it that you have checked the fuses, I paid £17 for the genuine bmw comfort relay and it fixed my window problem
If all windows stopped workin at once it's a relay ... You can usually find them under your steering wheel ... You more than likely have to remove the panel under the steering wheel and you'll see them... I forgot which one it was but call a BMW dealership ... And let them know what relay you need...
I have a 1993 bmw 318i and the same problem..no power to the windows or sunroof and no lights on any of the window or sunroof switches.The ANSWER is take the kick panel of the driver side locate the blue relay next to the orange or brown relay.Take the blue relay out and either replace it or take the blue cap off the relay and check the solder to all pins.There is one or more pins where the solder has crack..just buy a soldering gun and some solder .015 diameter and re solder all the cracked solder on the pins and it is back to normal.
the fuel pump relay in the trunk on the left side (pasenger)it's right underneath the plastic housing on the inside of the trunk on top of the rear wheel mold. The relay is a 5 prong relay light green in color....... hope this helps, let me know if you found it.
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