My 330i had a misfire and was running rough for a while after switching to ngk plugs. I finally decided to switch back to Bosch brand and the difference was obvious.
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You can never go wrong with Bosch OEM parts
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I love eBay
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I installed these plugs in a 2006 330ci ZHP coupe with the M54 motor. They work perfectly and the engine idles, runs smooth.
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The Bosch Platinum 4+ sparks plugs is a definite recommendation. Don't take only my word for it. I encourage you to buy it and try it. Thank you.
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