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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 04-05-2010, 12:38 PM
fatone fatone is offline
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Mein Auto: Acura Legend
Change ignition coil and spark plugs?

Hi,

I was trying to find a DIY for changing the Ignition coils and spark plugs, but couldn't find one. Can someone point me in the right direction. Does anyone have a diagram of where the coils are located? Also, is this an easy task for someone who doesn't really work on cars, but used to change my oil and spark plugs on my previous car?

Also I checked a couple websites and saw the Bosch OEM Ignition Coil
with Spark Plug Connector, but also the BREMI/STI part? Which one would you guys recommend?

Lastly, should I change all ignition coils or just the one that is misfiring? I am at 92k miles right now.

Thanks in advance
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  #2  
Old 04-05-2010, 05:10 PM
TechFreak TechFreak is online now
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Mein Auto: AC Schnitzer 745i Sport
OEM Part numbers :

http://www.realoem.com/bmw/showparts...04&hg=12&fg=05
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Last edited by TechFreak; 04-05-2010 at 05:22 PM.
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  #3  
Old 04-05-2010, 06:19 PM
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wilson009 wilson009 is offline
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Just replace the bad one and only if it is bad. A misfire doesn't mean a bad coil.
Attached Files
File Type: pdf Misfire CheckList.pdf (87.4 KB, 989 views)
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  #4  
Old 04-05-2010, 08:55 PM
Keif Keif is offline
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My videos showing how to get the difficult spark plug boots out, and pictures showing the general process --> here.
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  #5  
Old 04-13-2010, 07:39 PM
fatone fatone is offline
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Well, I changed my Spark Plug and Ignition Coil on cylinder 7 (which is on the driver side) and was able to do it by just taking off the plastic engine cover. Took about 20 mins! The hardest part was getting the spark plug and socket out after loosening it. Kief's videos and pictures gave me the assurance and assistance I needed. It wasn't hard at all! I guess when I reach 100k I will know how to change all 8 of the spark plugs and that is when I will be a little more complex with the back cylinders (4-8)

Thanks TechFreak, Wilson009, and Kief and thanks for a great forum!
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  #6  
Old 04-13-2010, 07:57 PM
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MakaveliFaison MakaveliFaison is offline
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How do you know which cylinder is misfiring
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  #7  
Old 04-13-2010, 08:21 PM
m50b25 m50b25 is offline
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Quote:
Originally Posted by MakaveliFaison View Post
How do you know which cylinder is misfiring
read errors with the scanner or buy one for 70$ from autozone, works fine

failed coils is a standard for N62 i would say it is standard for all bmw's starting form 90'
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  #8  
Old 04-20-2010, 01:37 AM
TechGuy TechGuy is offline
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If you have a misfire, you'll take out your plastic covers. Then you will start pulling the sockets on the coils one by one. At the instant of pulling one and seeing no effect in the way the engine idles, you have found the missing cylinder.

The V8s are a pain in the ar** to have the spark plugs/coils of 4th and 8th replaces. I take the caps of the coils off to be able to slide them out. I set a record for replacing the spark plugs and injectors at exactly 1.5 hours. And believe me I was in pain.
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  #9  
Old 04-20-2010, 01:45 PM
intsu intsu is offline
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If you have miss fires, does the check engine light go on at any point?

I think i am constantly having miss fires of some sort. When the engine idles, I can feel whole car shaking little bit. And when starting cold its definitely shaking hard.

btw what spark plugs did you use?
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  #10  
Old 09-04-2012, 08:44 AM
jkess114 jkess114 is offline
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A tip for pulling coils out: I grew tired, rather my fingers grew tired of the pain incurred pulling out the coils by the finger hole in the cap of the coil top. I took a long 3/8" extension, putting it through the hole in the cap, and was able to use two hands to get it to separate from the plug. Much easier and makes it pretty instantaneous. Before with my finger, I would have to twist it a bit and it was bloody murder on my fingers.

Best,
josh
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  #11  
Old 12-18-2013, 09:07 AM
BravermanBeamer BravermanBeamer is offline
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did it fix your problem? I just purchased a 99 528i.. got on it on the highway, got it home, now misfires a bit, thinking it's a plug too. how did you know which one was bad?


thanks for the support!
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  #12  
Old 12-18-2013, 09:09 AM
BravermanBeamer BravermanBeamer is offline
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so pull the sockets out one by one.. what about the plugs? pardon my ignorance, I'm new at this. -99 528i

thanks for the support!
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