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I'm curious as to why Bosch plugs are so bad for toyota's. Can anyone explain or direct me to an explanation as to why they don't work well with toyota's. Just wonderin!


I started getting a cel code for misfire cylinder #1. Went to a Toyota/Lexus Repair shop. First thing he asked was what kind of plugs I was using. I said Bosch. He said to get them out of there. Toyota's Denso stuff doesn't like anything but Denso or NGK Plugs. Cleared the code and replaced the plugs. No Problems since.