What causes a car to randomly catch fire?

So I was on the highway on my way home from work when I noticed a car on fire. It wasn't in a accident or hit anything just parked on the side of the road while the owners and the police watched helplessly burn. It kind of made me sad thinking what if that were me. Then I started freaking out thinking my car could do that. The car that was on fire was a newer Ford Explorer (like 2012-15 ish). That really made me freak out because I drive a 2014 Ford Focus. I know it could have been a lot of things but it made me terrified of my car for some reason (which is fine and not on fire).

Midgets

Usually a fuel leak.

Low coolant levels, over heating, not caring for an oil leak, not changing the oil frequently, overall neglect. Gasoline doesn't usually catch fire in an engine, it explodes. Gasoline may be partially to blame, but more likely an overheated engine, causes wires to melt short circuit, spark and ignite oil that is caked or pooled around the engine. A combination of the above are likely causes.

A well cared engine is not likely to catch fire - the car might, inside, due to a short circuit, but that rarely travels to the engine.

A mechanic could leave a oily rag near the exhaust. A fuel line can split. Oil overflows on to the exhaust.

Anything could happen at any time to anyone in any situation anywhere. Thousands of people die every day on the highways of America. Are you going to freak out about that now?

Electrically fires are common, does not happen often, but it happens.

Random addition of flames?

Car fires are not very common, but when they do occur the most common causes are a leak of a flammable fluid (e.g. Engine oil, brake fluid, power-steering fluid) onto a hot component (exhaust system, turbocharger), or an electrical fault.

Electrical fault, fuel leak or a brake or clutch fluid leak
Brake fluid is very flammable.
Exhaust not correctly fitted so too close to the body.
Overheating bearings.

Lots of causes.
Mine was the starter motor did not disengage and being driven by the engine caught fire.
I stopped and disconnected the battery and saved the car with only electrical damage.

  • What's causes car to jerk and the check engine light to go on and off? My car was working fine yesterday! It's a 2005 ford explore. I went to turn it on earlier and it started jerking a lot! I let if warm up a bit than the check engine light came on than it went off and on again. It keeps turning on and off! I know I need to change my spark plugs soon! Can it been the spark plugs causing it to jerk and the light to turn on and off?
  • What causes problems starting a car and the engine to misfire going over 60 mph? This problem started about two months ago. I have a 2006 Ford Taurus. So far no mechanic can figure out the problem. They have replaced all of the spark plugs (numerous times because they keep going bad), an engine coil, the crankshaft position sensor, the battery, did a tune-up, ran a $100 diagnostic test and still the problem occurs. Anyone have any idea what could be the problem? I forgot that they also did a coolant flush.
  • Should I receive money from ford for my vehicle randomly catching on fire? I had a 2009 ford ranger that we didn't have insurance for yet. About 80000 miles on it and the front end just catches on fire sitting in my driveway. Totaled the vehicle. Not having any insurance I'm screwed. Do I have a case ford should pay for it?
  • My 1995 ford crown Vic making a Continuous beep randomly when driving and even when the car is off? Not Beeping but a long high Continuous beep randomly when driving and even when the car is off. It's really high-pitched and sometimes it fades in and out but I can't get it to turn off I have a seatbelt on the car doors locked lights off and everything what could it be