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Okay okay okay. To start off my car runs and drives completely fine aside from a misfire. I have a set of coils and sparkplugs ready to go in though.

What I'm curious about are these issues:
1) Cruise control will stop working at random and turn back on a day or two later
2) Bluetooth will do the same as above /\
3) One day I couldn't shift into my odd gears or reverse, it felt like the gate on first gear that turns on when you're going more than 15 mph (it's a manual). Fixed itself overnight
4) My car has had the coils replaced 2-3 times in the last 8 months and after a couple months it'll start misfiring again.
5) A couple weeks ago my airbag and passenger seatbelt light turned on randomly and ever since then they've gone on and off. It'll ding at me when I have a passenger even when they are buckled
6) Check engine light will turn on, sometimes flash, for no more than 5 seconds then turn back off. Usually when I'm accelerating.

I'm really wondering if all of this could be an electrical issue or a faulty ECU? Any advice would be appreciated, I love this car and I'd hate for it to be a lemon lol.
 

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Check the shifter bushings. Any code will turn the cruise control off. Look at your coil connectors for broken locks. The flashing CEL means it's misfiring and a warning not to drive it. Enough misfiring can damage the cat from raw fuel burning in the cat. The fuel in a misfiring cylinder will wash away the oil film on the cylinder walls causing premature wear of the rings and cylinder. It's almost never the PCM. Intermittent almost always is a bad connection or broken or shorting wire.
 

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Okay okay okay. To start off my car runs and drives completely fine aside from a misfire. I have a set of coils and sparkplugs ready to go in though.

What I'm curious about are these issues:
1) Cruise control will stop working at random and turn back on a day or two later
2) Bluetooth will do the same as above /\
3) One day I couldn't shift into my odd gears or reverse, it felt like the gate on first gear that turns on when you're going more than 15 mph (it's a manual). Fixed itself overnight
4) My car has had the coils replaced 2-3 times in the last 8 months and after a couple months it'll start misfiring again.
5) A couple weeks ago my airbag and passenger seatbelt light turned on randomly and ever since then they've gone on and off. It'll ding at me when I have a passenger even when they are buckled
6) Check engine light will turn on, sometimes flash, for no more than 5 seconds then turn back off. Usually when I'm accelerating.

I'm really wondering if all of this could be an electrical issue or a faulty ECU? Any advice would be appreciated, I love this car and I'd hate for it to be a lemon lol.
The bluetooth issue is pretty common among Darts, typically requiring replacing of the bluetooth module. They seem to fail enough to where I wouldn't trust a used one. For the passenger seatbelt issue. I recall seeing a TSB or recall for the buckle on the passenger side. I had the same issue and bought a new buckle off eBay for like 35 bucks.
 
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