Hey guys so i changed out my spark plugs today with oem NGK plugs as i know is the way to go for our cars. And come to find out after pulling the old plugs they were Bosch plugs... Must have been the previous owner cause i just changed them for the first time since my purchase 2 years ago.. Right off the bat after the plugs were changed i noticed a huge difference! From gas mileage all the way to starting the car lol. The plugs didnt look funky when they were removed they were a light tannish color just thought id change them for the hell of it. My question is.. Is it bad that those plugs were in the car ? Or based on the condition when they were removed am i good to go?

You're fine.

Yeah, what's done is done. Glad to see you put the proper NGK spark plugs in there.

Owner before me had autolites in her and I didn't really notice a difference after a ngk copper install...Bosch must be ****

The owner before me put autolites in her and I didn't really notice a difference after i put ngk coppers in her...Bosch must be ****

Well at least you only had one brand of plug.

When I first got my I30 it was running 4 different brands of spark plugs. Two were NGK, the other 4 were an assortment of Bosch, AC, and Motorcraft. Gotta love a previous owner who would only replace a spark plug once it had completely failed to work. Ha!

Right off the bat a day and night difference this easy and quick of a job gave me such great results lol

Bosch I believe suck in everything they're installed in!!!!!

BMW's like them.

True ^ but i still dont get this previous owner doing plugs on his own car, u should know what to put in the dam car ! Or if it was done in a shop the mechanic should know what to put into the car. Like dam

BMW like them and BMW loves NGK!!!!