Spark Plug Diagnosis
Hey everyone. I've already compared the plugs to a diagnostic chart but I'm hoping you all might give me some good unbiased input. These were replaced today on my '05 X3 with 97K miles on the odometer. I've only had the vehicle a few weeks so I'm not sure if the plugs were original or not; perhaps they were changed at the dealer once before. They seem to show good signs to me, but what do you all think? Anything I might need to know?
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