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Old 08-28-2013, 06:58 PM
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Fudman Fudman is offline
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Location: Sudbury, MA
 
Join Date: Apr 2007
Posts: 6,232
Mein Auto: '02 530i Sport auto
If the plugs are original, then change them up. The BMW recommended change interval is 100K. However, I strongly recommend you read up on this forum. There is tons of info on anything and everything about the e39. If you just write a blank check to your mechanic to maintain this car, be prepared to write a large one. Changing plugs takes about an hour and minimal tools. Do you really want to pay someone $100 to do that? Because if your plugs are original, then likely so is your cooling system. And that is the priority service. Do a search for why. Thorough knowledge of the e39 is the best weapon against excessive maintenance costs and the best reason for reliable operation.
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