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      08-18-2018, 05:33 AM   #23
Mvy
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Originally Posted by ItsGary View Post
Where'd you get that price? You can get OEM Eldor ones for $539USD from FCP???

And that's for all 8 in total, $69USD/each
FCP Euro is where I got the price. OEM is $894 for 8. BMW Ignition Coil - Genuine BMW 12137841754. I would only consider an OEM part for coil replacement.

Id sure like someone to chime in on the interval to change plugs on a SC car. I think I can let it ride another year but I get itchy when I have not dumped a bunch of money into my car every few years.
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      08-18-2018, 05:35 AM   #24
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Iirc, the recommended spark plugs change is on the 3rd oil change. BMW suggest changing oil at 15k miles so technically you can change it at 45k miles
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      08-18-2018, 08:04 AM   #25
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Iirc, the recommended spark plugs change is on the 3rd oil change. BMW suggest changing oil at 15k miles so technically you can change it at 45k miles
Someone is going to take you to task on the 15k oil change intervals.
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      08-18-2018, 10:18 AM   #26
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Cant speak from the M3 perspective, but I remember from my days with an SC mustang, that once you SC, you have to go a step colder on the plugs unless the boost is very mild <5psi, yes SCs are harder on ignition systems due to elevated combustion temps. The mustang guys usually do 20-30k on plugs.
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      08-18-2018, 10:43 AM   #27
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Change your plugs if you really want to. Otherwise, you are fine to wait. There is no rush to do the job
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      08-18-2018, 12:01 PM   #28
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Someone is going to take you to task on the 15k oil change intervals.
15k miles or 1 yr, which ever comes first but I’m waiting to be corrected of course 😊
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      08-18-2018, 02:31 PM   #29
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Some good plugs getting thrown out around here.

30K is fine for NA. I did every 25K in my SC E46M and they still looked good.
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      08-18-2018, 02:34 PM   #30
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Quote:
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Quote:
Originally Posted by ItsGary View Post
Where'd you get that price? You can get OEM Eldor ones for $539USD from FCP???

And that's for all 8 in total, $69USD/each
FCP Euro is where I got the price. OEM is $894 for 8. BMW Ignition Coil - Genuine BMW 12137841754. I would only consider an OEM part for coil replacement.

Id sure like someone to chime in on the interval to change plugs on a SC car. I think I can let it ride another year but I get itchy when I have not dumped a bunch of money into my car every few years.
Eldor is the one who provides BMW with the coils... You're wasting money on a BMW branded box. No difference between the BMW branded box vs Eldor ones since Eldor is the OEM.
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      08-18-2018, 02:56 PM   #31
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I've done my plugs every 50,000 and no issues. The service intervals devised by BMW are ridiculous.
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      08-18-2018, 04:10 PM   #32
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I've done my plugs every 50,000 and no issues. The service intervals devised by BMW are ridiculous.
I tend to agree. 37k is laughably short. Most cars with platinum plugs are spec'd at 100k.
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      08-19-2018, 06:37 AM   #33
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Quote:
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I tend to agree. 37k is laughably short. Most cars with platinum plugs are spec'd at 100k.
True, I wonder why BMW on one single item recommend shorter interval then needed when pretty much all the others seem too long. Safe side as they are part of the knocking sensor maybe?
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      08-19-2018, 12:39 PM   #34
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True, I wonder why BMW on one single item recommend shorter interval then needed when pretty much all the others seem too long. Safe side as they are part of the knocking sensor maybe?
I'm sure there's testing to back it up. Could be knock sensitivity drops off after 37k? There is always a financial component to it, because they know that the service department can make easy money on that change. Have you ever looked at what the dealer charges to change 8 plugs? It's ridiculous.
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