Replacement ignition coil insanity (2022 edition)

[Golddots]

Anyone here buy a spare and keep it in the trunk? I’m debating between buying all 8 or just two. It’s really not a big deal to keep a 10mm and a torx in the car. Along with a cheap obdii dongle of course to isolate the misfiring cylinder on the fly.

[spammysammich]

I keep two in my trunk. I’m considering throwing them in a food saver bag with a desiccant pouch and pulling a light vacuum for storage in there.

[Nickco43]

I recently purchased an “OEM ignition service kit” from turner for $850 which come to find out includes aftermarket standard motor parts ignition coils. They look like cheap parts store ignition coils and are being returned.

I ended up purchasing 5 good used ignition coils from someone locally today for $100. I am going to put four of them in the rear of the engine and keep my 204k mile ignition coils as spares in the trunk.

I have heard reports of the original ignition coils lasting 200-240k miles without issues. All of my ignition coils are original and the car runs great. Anyone pushing 200k I would recommend just purchasing a used set of ignition coils from a sub 100k car.

[Ervin87]

There is no way of telling when they will fail. When they do, buy a new OEM coil. Mine failed at 65K (only 1) so far.

[fathermark]

Does anyone know if any changes to the production quality of the NGK 48729 coil? This is a 2022 edition thread. I had 1 fail last week, car has just over 100k miles, its an '08. BTW that failed coil I glued back together (top snapped off) 4 years ago and has been fine since. Guess I'm asking is it a hit and miss with the NGK? 1 in 10 are bad? or all bad? From the thread it appears all are junk.

[pearlpower]

Anyone know if any good (NGK) aftermarket versions made it back into production? Few of the other options failed immediately on me. I heard NGK stopped making them for this engine (fingers crossed).

[OmairK]

I don’t think anything has changed… still. All aftermarket are garbage. Just find a good used set in case of emergency or spend the $$$ on new ones from BMW!

[gh0stE92M3]

So I’ve been looking for coil packs and places to buy them and i came upon this site it’s in the uk and advertise to be geniune bmw coil packs comes out to $1585 shipped. It’s still a grip but it’s better than 2k+ from fcp euro after tax and shipping.

geniune coil packs

[m3s65b4.x]

Aftermarket NTY coil packs from UK (or Germany)
https://www.autodoc.co.uk/spares-sea...rd=12137841754

I went OEM and local best price is 1160 EUR
https://ristmik.ee/et/elektrisusteem...&results=10000

They run out of stock and my premium supplier also
https://aeromotors.ee/kataloog/searc...ry=12137841754

[Jinxter]

Found a 3rd party on Amazon. Haven’t tried it yet as i still have an oen backup sitting in my trunk. But for this price someone might want to try them out. Just let us know if they are any good please. I’d buy a full set of 8 just to keep in stock if they work.

https://a.co/d/brDpDeD

[whitem3]

Posting here as this thread was very helpful for me. My 2009 E92 M3 (90k miles) went into limp mode a couple of weeks ago. Threw several misfire codes among them being P138C (cylinder 8 misfire). I went in and replaced the spark plug with an NGK plug and the ignition coil with one from Autozone (before I found this thread). Car would drive fine until warm (10ish minutes) and then go into limp mode. Pulled the coil and plug again and found fuel on the plug. Thought it may be the dreaded injector failure and so I scoped the cylinder, ran compression (came back at 180psi) and replaced the injector… same issue… 10 minutes into driving, limp mode and P138C. Found this thread and immediately ordered OEM ignition coil from FCP. Just installed it and have been driving the car with no issues.

[bibibibi69]

Originally Posted by whitem3

Posting here as this thread was very helpful for me. My 2009 E92 M3 (90k miles) went into limp mode a couple of weeks ago. Threw several misfire codes among them being P138C (cylinder 8 misfire). I went in and replaced the spark plug with an NGK plug and the ignition coil with one from Autozone (before I found this thread). Car would drive fine until warm (10ish minutes) and then go into limp mode. Pulled the coil and plug again and found fuel on the plug. Thought it may be the dreaded injector failure and so I scoped the cylinder, ran compression (came back at 180psi) and replaced the injector… same issue… 10 minutes into driving, limp mode and P138C. Found this thread and immediately ordered OEM ignition coil from FCP. Just installed it and have been driving the car with no issues.

I’m having the same issues too after chasing a crankshaft sensor issue and replacing the TA’s. Today I swapped coils from 7 to 5 and 3 to 1. I was having a misfire at cylinder 7. Cleared the codes after swapping and immediately get reduced power at cylinder 5 misfire. I just replaced plugs too, took them out and they were fine. Sucks that we have to fork out 230+ for one single OEM coil.

Has your car been driving good with no issues since replacing with OEM coil?

[drwankel]

Considering that I believe these coils are unique to the S65, you would think this is lawsuit worthy since the parts seem to be a 100% failure out of the box now unless they are OEM.

You've got companies selling nothing but a flawed product that doesn't work.

[evilpinkeye]

After reading this read...crap...

[avantegardestyle]

bump...............crazy. any new source thats less of a wallet rape?

[andym3]

I am curious if anyone tried the eBay ones: www.ebay.com/itm/145720365988

[M3JayM]

Originally Posted by avantegardestyle

bump...............crazy. any new source thats less of a wallet rape?

This.

[m3peat]

Hello all,

Any updates to our coil dilemma other than purchasing OEM $$$$ ?
I bought a new (used) car last week and the first drive where I actually had time to take it to redline (20 minutes or more into the drive) and limp mode reintroduces itself to me upon one redline. Limped back to the shop I got a PPI at. Initial diagnosis is cylinder 6 misfire/coil pack.
Figured, ok just get new coils from eldor and start over with fresh coils. This is where I see they only sell to bmw and they in turn sell to us poor souls who pay ridiculous prices for these.

After reading this whole thread, seems I should just buy 1 or 2 and be on my merry way instead of plopping down $2k+ for 8.

Or

I do have 3-4 old ones (from my ‘09 M3) that were fine when I replaced the whole set with new ones 3-4 years ago. Should I just use one of those and the rest when needed? They’ve been in a sealed plastic bag for the last few years. Or did coils change over the years and they wouldn’t be a good mix/match?

Appreciate the help.

[chutak]

Definitely use your old coils until you have to buy new ones. No sense in having perfectly good coils laying around when your car needs them.

[m3peat]

Originally Posted by chutak

Definitely use your old coils until you have to buy new ones. No sense in having perfectly good coils laying around when your car needs them.

I’m leaning that way but according to a rep at FCP the coil packs were modified in 2011 and my old ones (2009) may not pair well with the newer version. Hmm