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Hi everyone. I will start by saying my car is bone stock 2008 335xi. I bought it at 60k miles. HPFP was done at 35k, some injectors where replaced around 25k. Don't know if or when valve cleaning was done. I started having sputtering/engine shaking and service engine light on around 63k miles. Codes said it was cylinder 6 misfiring. I changed all 6 plug. Around 64.5k miles it happen again. Cylinder 6. I changed the coil with a new one. 65k, again cylinder 6. But this time the SEL light have come on and stayed on. Car drives fine. I have an appointment with the dealer Thursday. Any ideas/suggestions?
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