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The colder NGK that I installed are iridium. I don’t know the factory change interval for the BMW Bosch plugs. I change plugs more frequently.
Sorry about the lack of pictures. I was looking for some as well. Just do it. You will see what you need to remove and move. Patience and care are more important than skill. My thin wall spark plug socket arrived today. That would have saved me a little time.
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