Recently my 2014 M3w has gotten progressively harder to start to the point where it hardly starts at all. The car has 17,800 miles. I have over the past weeks replaced plugs, fuel and air filters, and the battery. The problem just progressed. It almost catches right at the start. When it starts it is right at first crank. When it starts it runs fine, idles effortlessly, plenty of power, no flat spots. The starter engages and turns handily, the voltage drop whilst cranking is about 1.4 volts. I've got spark and fuel pressure. I'm all out of ideas.
