Originally Posted by crashoverride
The car going crazy and misfiring and all sounds like you got your spark polug wires all crossed over and on wrong cylinders....It's been five days what did go wrong??
You can't cross up the plug wires on an N52. It coil-over-plug and there is no slack in the wire harness to put the coil on the wrong plug, or plug the wrong connector on the wrong coil.
My advice with experience maintaining my BMWs for the past 20 years is to only use OEM BMW parts.