[Miss99Lydia]

A bit after i was driving it it started making the noise but it wasn't so bad and still drove fine.
Got home and after a while was going to go for a drive again and the noise was just awful and that's when the check engine light came on as well.

[loggin]

Unfortunately that sounds like serious engine trouble.. It could also possibly be making that noise due to no oil in the engine.. Either way I would not drive it or run the motor until you find out what the problem is.. Have you identified the fluid on the ground from you first video??.. Is it motor oil??

[Orion4]

That doesn't sound like anything "good"! Did you get any other warning light other than "Check Eng"? Do you have a fault code reader?

[Miss99Lydia]

Originally Posted by Orion4

That doesn't sound like anything "good"! Did you get any other warning light other than "Check Eng"? Do you have a fault code reader?

the check engine light was the only one that came on.
i took it to a store for a quick code check and they said there's been a misfire on cylinders 3 and 4.
so i believe i just change the ignition coils and the spark plugs?

[Miss99Lydia]

Originally Posted by loggin

Unfortunately that sounds like serious engine trouble.. It could also possibly be making that noise due to no oil in the engine.. Either way I would not drive it or run the motor until you find out what the problem is.. Have you identified the fluid on the ground from you first video??.. Is it motor oil??

the engine oils were at max and i drove it to an auto store for a code check and they said it was a misfire.
I'm assuming i just replace the ignition coils and i read that i should change the spark plugs as well..

no it wasn't motor oil. found it to be AC water (i hope so at least (smelled like it))

[turo329]

That doesn't sound good AT ALL. A misfire does not sound that bad. Take it to a dealer or independent and have it checked. DO not drive that thing. Open the oil cap and see if there is any coolant in the oil. Before you just go swapping parts its best to have someone who knows these cars run diagnostics. Sounds like a bent rod or harsh piston slap.

[cfm56d7b]

Echoing earlier comments - professional diagnostics is the only option at this point. Small percentage of N55 engines were affected by excessive connecting rod bearing wear. BMW addressed this problem under the warranty.

[Miss99Lydia]

So right now, i should replace the ignition coils and spark plugs right?..
I'm going with the Delphi brand coils but am unsure which brand spark plugs to get.

I do feel like the noise the car makes is wayy worse than a normal misfire so i want to have it checked out by professionals, just don't know what shop in Iowa i should take my car to.

[Billfitz]

That noise isn't caused by plugs or coils. Could be valves, could be bearings, impossible to say from a video, but I wouldn't even drive it.