That’s my car a 2004 BMW Z4 2.5i and I love it to death it has 157000 miles. I can’t find the problem it has when it comes to starting. Battery and alternator has been tested and they are fine, Starter is new, and fuel pressure seems to be fine. I will attach a video where I have it hooked up to a fuel gauge and it actually struggles to start. Sometimes it sounds worse than in the video it almost sound like if you could choke a car it would sound like that on it’s worse day. Once it’s running there are no problems. I have scanned it for codes and nothing is showing up. I don’t want to just throw parts at it because than can get expensive but the only things I can think of are crankshaft position sensor, ignitions Switch, or something fuel related. I did have oil in the crankshaft positions sensor connector and cleaned it up. I don’t think it was from the sensor itself I had a hose near it that had a big hole that runs oil through it and I think it somehow dripped from there. I assumed if that did any damage I would have a code but I don’t. Any help is appreciated it’s really driving me nuts. Thank you.
I should also had that I think this mostly happens when the car is hot not from cold. I say I think because I don’t actually keep track of that like I probably should.
Maybe the starter going bad, draws amps. Also when hot may be vapor lock, small chance head gasket but worth looking at antifreeze consumption.
