SOURCE: BMW 740IL Wiper Issue
try checking for a short to power on ur 12 volt comming into motor also check for a good ground at the plug for ur wiper motor
SOURCE: 2001 BMW 740iL is sputtering when I accelarate and shaky when idl
A tune-up and throttle body clean-up is a good idea, but mind you on those cars, the valve covers usually leak into the spark plugs and coils, causing the car to misfire. If you are replacing the plugs and find them soaked in oil; replace your valve cover gaskets or you will be back to the same problem soon after the oil soaks the new plugs back up again.
SOURCE: my windows do not roll up on my 94 bmw 740il
Check the fuse and relay under the hood to see if any of them are faulty...
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