they are Bosch plugs. Also now im having a new issue also. yesterday my serpentine belt broke on me. i drove car to gas station (ran fine) shut car off, put gas in, started it up and had no power steering and battery light was on. looked under hood and belt was broke. replaced belt and now car wont start. it tries to but won't fire up. was thinking starter or alternator any ideas on which would be better to start with? im trying not to buy 2parts instead of just 1?