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Old 01-17-2013, 10:53 PM
mgarciah mgarciah is offline
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Location: Costa Rica
 
Join Date: Sep 2012
Posts: 93
Mein Auto: 320i, X3 and X5
The coil/plug nearest to the passenger compartment is under higher temperature, is closer to the firewall and there is no good ventilation that deep, so it is normal that fail prematurely, if the engine has a misfire error, unstable idling, buy one coil/plug and swap it starting from the one that is closest to the passenger compartment, this is a plug and play operation. Dealer will recomend to change all of them but you can save a lot of money DIY.
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