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      10-21-2012, 01:12 PM   #9
Jeff@TopGearSolutions
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Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com

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How many miles on the spark plugs? They should be changed every 20,000 miles - 25,000. Spark plugs are notorious for causing misfires especially old ones. As they age the gap increases.
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