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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 04-12-2013, 09:35 AM   #1
sean vaz
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M3 coil packs

Hello, I own a 2002 M3 that has around 91,000mi and when it drives, it has like a stutter on acceleration. I think it might be a coil pack. As i've heard that they are very common. Does anyone have any ideas to which one, has anyone come across this problem before? Aside from going to the dealer and dropping a grand to get it fixed, does anyone have any other options?

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Old 04-12-2013, 09:38 AM   #2
choxor
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A dead coil pack will be very obvious, it'll also be accompanied by misfire codes.

WHat codes do you have.
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Old 04-12-2013, 09:43 AM   #3
sean vaz
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the check engine light came on, but I dont have a scanner to check the code.
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Old 04-12-2013, 09:50 AM   #4
sean vaz
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coil packs

Does anyone know if they are hard to change? I was a mechanic, so i know my way around an engine
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Old 04-12-2013, 09:58 AM   #5
choxor
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No, they are not hard to change.

Step 1: Scan the codes.
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Old 04-12-2013, 09:59 AM   #6
toy4to
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They are very easy to change. You have to remove them in order to change your spark plugs (if you plan to do that at the same time). Buy the bosch ignition coils off Amazon, bosch part 00124. Should cost around $25 a piece.

But as others mentioned, get the codes read. If it points to misfire, then change the ignition coils with what I mentioned above.

Last edited by toy4to; 04-12-2013 at 10:00 AM.
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Old 04-12-2013, 12:50 PM   #7
Solidjake
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If you were a mechanic you would know to scan the car for codes first before replace stuff that doesn't need to be...
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Old 04-12-2013, 05:55 PM   #8
mzeed
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The hardest part is the wait for the parts to arrive.....

and change the plugs while you are there....Codes are usually 300 along with 301 to 306 depicting which cylinder(s) from front to rear is/are causing the SES light to come on....

highly advise to change all 6 of the coils and plugs beyond 60K as opposed to just the bad one(s)
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Old 04-12-2013, 06:41 PM   #9
tinman831
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Quote:
Originally Posted by toy4to View Post
They are very easy to change. You have to remove them in order to change your spark plugs (if you plan to do that at the same time). Buy the bosch ignition coils off Amazon, bosch part 00124. Should cost around $25 a piece.

But as others mentioned, get the codes read. If it points to misfire, then change the ignition coils with what I mentioned above.
Damn where was this post when I spent $75 for a BMW one?
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