Car electronics shut off while driving??

[Prestovie]

So I was driving back from dinner, and on the way home there are some pretty choppy train tracks. Well I went over those, and about 500 yards away after a stop sign something weird happened. In the middle of driving, going around 30, my headlights started to flicker, my radio died, and my radar restarted. So I quickly yanked the radar and turned off the radio, figuring it was the battery. Lights slowly flickered back on for the rest of the way home(only another couple minutes thankfully)
Got home and parked it and it started right back up?
Anybody know what might've happened? A few weeks ago my battery died temporarily and took my car a couple minutes to start up, but this is the only instance since then.
Any help is appreciated, thanks guys.

[holyc0w]

Did you replace the battery?

Strange things happen when the battery needs to be replaced.

[fw_fw]

Definitely get that battery tested!

[fredo]

+1. Is it possible the terminals are a little loose ?

[az3579]

Have your alternator AND battery tested. Batteries don't typically die while driving unless the alternator has a problem.
Sounds like some sort of a ground issue, be it with those components or with something else.

[Prestovie]

Ok so I took it to Autozone earlier today and had them run a diagnostics for free(yay) and they found out my crank shaft sensor was misfiring, part number P0335
Said it was a $45 part, unfortunately didn't have the money on me at the time so I had to drive home without it.
Anybody have experience w replacing/fixing this? I looked into it and it doesn't look all too confusing to find and remove

[fw_fw]

OK, they read the codes, but did they check the battery and alternator?

I wouldn't think that the CPS would affect dash electrics....

[GotZHP]

My guess is battery, alternator, or voltage regulator. I had something kind of similar happen to me last week. Driving down the highway all is fine, then my radio stops working. Thought at first it was an issue with my phone that was hooked up to the AUX cable so I tried the CD. No volume. Then many warning lights came on (Brake, abs, traction control), then some of my gauges stop working. Pull over, shut down the car, and try to restart, wont fire.

I had already replaced alternator and voltage regulator, so I bought a new battery and things are back to normal.

Bimmers do weird things when there voltage is off, so Get your alternator & battery tested. First go to fixes. Could be as simple as a loose connection.

[az3579]

Ok so I took it to Autozone earlier today and had them run a diagnostics for free(yay) and they found out my crank shaft sensor was misfiring, part number P0335
Said it was a $45 part, unfortunately didn't have the money on me at the time so I had to drive home without it.
Anybody have experience w replacing/fixing this? I looked into it and it doesn't look all too confusing to find and remove

While that could still be a problem, that probably isn't what caused the symptoms you describe. A bad crank position sensor would cause drivability problems. Your car was running fine when all this happened, right?

[Prestovie]

Ah jeez haha alright yea that makes sense, I'm gonna end up taking it into my local dealership to have a full diagnostics done. If it's the alternator I'll cry lol, I can handle it being the battery or voltage regulator though. I'm glad I didn't buy the sensor then, $45 still in my pocket
I'll keep you guys posted, thanks so much for the help