525i spark plugs
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My Ride: 05 BMW 530I
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It all depends on driving style. I just had mine replaced at 94000 for the first time. I could of waited to 100k but decided to do all my services at once. It you are a hard driver I would not replace them no later than 50k.
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My Ride: 04' 545i, Sport Package, Black, Active Xenon, ARS, Aux Input
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As stated, typically its a 100,00 mile service and your idrive should tell you how long until your next change.
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My Ride: 2006 530i, Jet Black, Tan, Premium, Steptronic
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The Technical Adviser for BMW Car Club of America recommends replacing spark plugs at 60k miles. I changed mine out and was glad that I did- the old plugs were fouled.
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