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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

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 11-06-2012, 04:18 PM
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TacoBuster TacoBuster is offline
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Help! Engine Coil Question

I have 03 325ci conv. and my cylinder 1 coil went out. i saw in Bavauto.com some high performance coil set. part #5004 6. My car is basically stock except for k&n air filter. would there be any malfunctions with the engine or computer if i install these? or would it be best just to get the regular stock ones?

Thanks in advanced.
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  #2  
Old 11-06-2012, 04:25 PM
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Quote:
Originally Posted by TacoBuster View Post
I have 03 325ci conv. and my cylinder 1 coil went out. i saw in Bavauto.com some high performance coil set. part #5004 6. My car is basically stock except for k&n air filter. would there be any malfunctions with the engine or computer if i install these? or would it be best just to get the regular stock ones?

Thanks in advanced.
Non of those are better than the bosch ones like they say they are. Your better off just getting a Bosch one from some where such as oembimmerparts.com plus you'd be supporting a sponsor of this website. And there cheaper.
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  #3  
Old 11-06-2012, 05:26 PM
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Ok thanks. So i guess bosch spark plugs as well since im going to change the coil set?
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  #4  
Old 11-06-2012, 06:19 PM
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floydarogers floydarogers is offline
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You only need to change the single coil that has failed. Although the others may go sometime in the future, there is no real need to change all 6.
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  #5  
Old 11-06-2012, 06:34 PM
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I was thinking in changing all 6 just to know those parts are ok
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  #6  
Old 11-06-2012, 08:55 PM
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Quote:
Originally Posted by TacoBuster View Post
I was thinking in changing all 6 just to know those parts are ok
Don`t spend money needlessly....coils are like light bulbs....either they work, or they don`t work. Just get one.

And, if your K&N is the type that gets oiled, do yourself a favor and change it back to stock.
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Last edited by Fast Bob; 11-06-2012 at 08:57 PM.
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  #7  
Old 11-07-2012, 09:13 AM
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True.. I am going to change it back to stock. A friend of mine told me to change it back but never knew why. The car already had the K&N when i got it
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  #8  
Old 11-07-2012, 09:21 AM
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Originally Posted by TacoBuster View Post
True.. I am going to change it back to stock. A friend of mine told me to change it back but never knew why. The car already had the K&N when i got it
Oiled air filters have a long history of being MAF killers in BMWs....stock panel-type filters are so cheap (typically around $15) that it`s not really a financial hardship to change it once a year.
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  #9  
Old 11-07-2012, 09:37 AM
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Quote:
Originally Posted by TacoBuster View Post
Ok thanks. So i guess bosch spark plugs as well since im going to change the coil set?
If you ever change your spark plugs go with NGK. But as everyone else said you only need to change your 1 ignition coil. Bob is 100% correct it either works or it doesn't just like a light bulb.
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  #10  
Old 11-07-2012, 03:07 PM
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Ok going to get it fixed today
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  #11  
Old 11-08-2012, 04:17 PM
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I fixed my coil. I had to get the Bremi since the Bosch had a different harness connector. Car is working like a beauty again .. Now how do i turn if the SES light?
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  #12  
Old 11-08-2012, 04:32 PM
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Originally Posted by TacoBuster View Post
I fixed my coil. I had to get the Bremi since the Bosch had a different harness connector. Car is working like a beauty again .. Now how do i turn if the SES light?
Different connector huh?. Bremi's are the ones no one uses because there crap btw. Bremi's were on recall at one point if I remember correctly.
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  #13  
Old 11-08-2012, 04:46 PM
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Dam. And when i removed the cover all i saw where bremi coils. Im assuming they are the original ones from dealer.
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  #14  
Old 11-08-2012, 04:52 PM
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Thats wat they told me
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  #15  
Old 11-08-2012, 06:06 PM
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It's fine...
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  #16  
Old 11-09-2012, 09:43 AM
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Now how do i remove the SES light?
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  #17  
Old 11-09-2012, 10:30 AM
jdauria jdauria is offline
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Quote:
Originally Posted by TacoBuster View Post
I have 03 325ci conv. and my cylinder 1 coil went out. i saw in Bavauto.com some high performance coil set. part #5004 6. My car is basically stock except for k&n air filter. would there be any malfunctions with the engine or computer if i install these? or would it be best just to get the regular stock ones?

Thanks in advanced.
Bav Auto high performance coils are a joke they don't do anything. Just a waste of money, go OEM.
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Old 11-09-2012, 11:28 AM
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Now how do i remove the SES light?
OBOII reset tool
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  #19  
Old 11-09-2012, 01:55 PM
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Never mind the light turned off by itself.. Finally.. Its a shame having a bimmer with the SES light on
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  #20  
Old 11-09-2012, 02:00 PM
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Quote:
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Never mind the light turned off by itself.. Finally.. Its a shame having a bimmer with the SES light on
Yup. I was just going to say it should go off by itself after a few restarts if the issue is resolved.
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  #21  
Old 11-10-2012, 11:59 AM
GoForthFast GoForthFast is offline
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Originally Posted by TacoBuster View Post
Dam. And when i removed the cover all i saw where bremi coils. Im assuming they are the original ones from dealer.
Bremi's were recalled. My car went back into the dealer in '05 for the recall. If you had Bremi, you'd get all new coils.
Check with dealer to see if you can still get replaced.

Bentley says to replace coils in sets of six.
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  #22  
Old 11-10-2012, 01:18 PM
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Ill check if im able tobut i doubt it
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  #23  
Old 03-09-2013, 01:16 PM
QAfred QAfred is offline
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Originally Posted by Fast Bob View Post
Don`t spend money needlessly....coils are like light bulbs....either they work, or they don`t work. Just get one.

And, if your K&N is the type that gets oiled, do yourself a favor and change it back to stock.
Bumppp....Sharing lesson learned.
I had a coil go bad on my 2000, 323i back in 2009. It had 147k on it. It came stock with the Bosch coils (my 2001 330ci came with Bremi coils- still in there with no failure and 153k on the car).

Anyhow, back in 2009 I bought a BWD E-383 from O'Reilly. What I found was it came in a BWD box with Bosch stamped on the housing of the coil exactly like the OEM....however, this BWD / Bosch was made in Slovenia, my OEM Boschs were made in Germany...It all worked out, replaced #3 coil and now have 70k on that coil- no problems.

Last week, I had P0305, changed #5 coil, cleared codes all was good, for one week. Yesterday, I got code P0301, swapped #1 coil with my #3 and code moved....

Last week and today, I again bought BWD coils, but this time they came in an Intermotor box, with BWD stamped in small letters on the bottom of the box and the coils were made in China....yikes. I bought it anyway since I did not want my wife's car down waiting for coils to ship.

Since I now have 217k on the 323i, and Bentley declares you can replace just one, if it is like model/brand, but if you do not replace with like brand replace all six. So, what I decided to do was buy 4 more Intermotor from Rock Auto...only $53 each vs 63 at O'Reilly.

I know, I will now end up with six Chinese / Intermotor coils, but they will be of all like kind/brand- per Bentley- and I will keep the three OEM and one Slovenia Bosch for back-up for the rest of her life.

Moral of the story....one is okay to swap if your car has less than, let's say, 150K, but if you have more than 200K, like I do, definitely change all six.... I wish I would have bought these BREMI's when the one went out last week....awesome deal for $310...new plugs included...and just because BREMI had a recall at one point in their production history, does not mean they are junk brand forever..IMO....never burned one yet in my 2001 330ci -pre recall date, but I suspect they worked the bugs out from 2003 recall time frame and would be just fine now.

http://www.ecstuning.com/BMW-E46-323...ion/ES2588238/



Also, on Air Filters...have read this opinion a lot too, but want all to know I have had a Krap and Nasty air filter in both of my E-46's for over 10 years now...just lost my first MAF a few months ago on my 323- over 200K...so my experience does not reveal K&N air filters honk up MAFS...probably anecdotal evidence applied to this theory and repeated by others, but not based on any facts....perhaps many over oil? I don't know, but I never had an issue with them.

Last edited by QAfred; 03-09-2013 at 01:26 PM.
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