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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 09-17-2012, 01:32 PM
RCorney RCorney is offline
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change coils with plugs?

As part of my DIY Inspection I, I was planning to change the plugs since I'm at 98k miles and don't think they've ever been changed. My question is do you all change the coils along with the the plugs as a general maintenance practice or 'don't fix it if it aint broke' mentality?
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  #2  
Old 09-17-2012, 01:34 PM
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J. Kidd J. Kidd is offline
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Quote:
Originally Posted by RCorney View Post
'don't fix it if it aint broke' mentality?
Typically not really a "wear" item.
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Old 09-17-2012, 01:56 PM
skwidrific skwidrific is offline
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I'd suggest inspecting the "boot" that fits the spark plug on each one. If they show signs of wear, might as well replace them. I started replacing my coils one by one when they would prompt codes getting thrown, and then started doing it as a pre-emptive measure. I have 2 of the original coils left that will get changed here in the near future.
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Old 09-17-2012, 02:22 PM
RCorney RCorney is offline
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That's kinda what I figured... but thought I'd take a quick poll... thanks!
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Old 09-17-2012, 02:25 PM
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Coils are like light bulbs....they either *work*, or they don`t work. You won`t gain anything by changing coils that are presently working.
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