Just wondering if I can get away with using bosch spark plugs on my 2003 civic ex. I know some people use the recommended OEM plugs but how bad is it to actually use the non OEM plugs and coils? Is it really going to cause major problems in the long run?

 

Personally, I like NGK spark plugs ... OEM.
Toyota uses them on their engine ... especially for their V6 where the back three are almost impossible to change without tearing the engine apart.
They usually last for 100K miles.
But, go ahead and try the Bosch plugs.
Let see how long they will last??
Please let us know.

 

Welcome to the forum. I used bosh iridium on my 02 civic ex. Got 130k + before plug failure. And used auto zone coils.