Replacing Coils: OEM or After Market??

[yanksfan350z]

I have a 2003 350z Enthusiast. My car was running fine, and one day I started it up and it was having a cylinder misfire. The car has very little power and sounds awful. I changed the spark plugs but that didn't resolve the issue. When my mechanic ran a diagnostic scan it came back with a random misfire code P0300.

He said the problem was most likely a bad coil, and this has been a recurring problem on 350zs, Maximas and G35s. Unfortunately he can't figure out which coil is defective. Does anyone know if there's a way to narrow it down any further, or am I going to have to replace all of the coils?

If so, is there any difference with the after market coils as opposed to the OEMs? The price difference is significant, so I'd like to get the after market ones.

Thanks in advance.

[dasoupdude]

It all comes down to your own preference, you can never go wrong with oem quality, even if they are coilopacks.

[S1L3NT R3AP3R24]

I could be wrong but this doesn't seem right. If a coil was bad then there wouldn't be a random misfire. These cars are coil-on-plug so if one coil is bad then that cylinder will be cause the misfire so instead of a P0300 you would have a P03001 through a P03006 depending on which cylinder is causing the problem.

I think you should do a little bit more diagnosing on this before replacing the coils.