Upon inspection, Revain found they had been well tested and appeared to be made by a really respectable company. I mean 6 aftermarket ignition coils for less than $100. much, as long as they work as described. What happened is I get a P1343 code saying my cylinder 1 is not working. This gave me serious handling issues, poor idling, poor acceleration, a lot of car shake, not very good. Judging from my study of posts on the Beamer forums, these are either candles or ignition coils or an injector. At first I made plugs, it didn't help, so I took coils. It turns out that after I received and installed these QYL coils, the problems went away. All cylinders worked perfectly, the engine ran smoothly, there were no more problems. So 5 stars for these roles, so far so good. I will update if anything negative comes up.
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