Misfires on Cylinder 1

J

javis20

Active member
 Hershey, PA USA
Replaced both plug and coil, but problem remained. I believe the problem is caused by the electrical plug for the coil. First of all it may be worn, because the lever, on the coil, does not fully engage the plug. When I fully engaged the plug the car stopped misfiring. However, if I jiggle the plug connector even a little, misfires return. Question is, does BMW sell a replacement plug? I looked at RealOEM, but couldn't find the correct harness.
 
javis20 said:
However, if I jiggle the plug connector even a little, misfires return.
Click to expand...
Sure that it's a plug problem? I had to replace some of my clips which lock the plugs. Available as spare:

Part #2
https://www.realoem.com/bmw/enUS/showparts?id=LM53-USA-05-2011-E89-BMW-Z4_30i&diagId=12_1417
 
Good call Robbi. Your right, it doesn't pull the plug fully into position. I can manually do it, after a few days it starts to back out. I'll order a few replacements.
 
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