So my wife goes out this morning and she says X5 won't start, she needs to get to work and so do I, So I take her down the street to her parents and she borrows her dad 530i for the day, she calls to tell me how much nicer a ride it is! Anyways off to work I go thinking crap what could this be now. I just changed the starter a few months ago, battery is 2 years old, gas tank is half full, it was 0 degrees out but its in the garage. I did some research and people says it could be the key is faulty, ignition switch, or trans not in gear. So I come home from work put it in neutral and starts right up! put it back in park and start again no problem! I hope thats all it is that my wife didn't engage it fully into P the nite before...anyways it was an easy fix luckily! If for some reason this repeats again I heard it could be the Neutral SW going bad?

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2003 BMW E53 X5 4.4i - M62 engine (Non Sport with Premium and Cold Weather Package)
Color: Steel Gray Metallic
Mods:4.6is Exhaust (Pipes, Mufflers and chrome oval tips) BMW Sport package Taillamps, BMW Tire Valve Stem Caps
Medium tinted front windows
JVC HD Radio
Alpine 4x100 channel Amp
Orion 600W Mono HC Amp
Three 12" Sony Xplode in subwoofer enclosure