Coils?

[332]

I have 2 bad coils, was wondering if there is an upgrade to oem? Or a more affordable option? thanks

[fattycharged]

They’re about $30 no?


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[332]

idk tbh, I haven't looked. I'm kinda out of touch these days, I remember Bav auto had some dinan sells em? are those all trash? any oem+ or just buy the delphi?

[beemer_guy]

$80 for Genuine, $30 for "OE" but that is misleading because there are 2 Delphi coils, one made in Portugal which is the actual OE coil, and the China one which is objectively worse and also looks different. I can take some pictures and show you the differences in a bit, but the Chinese Delphi coils seem to be hit or miss on longevity.

I know some people also use Bosch coils but I don't know anything about those, aside from them being one piece I think, instead of having a boot like the Delphi's. I've also read issue with the Chinese Delphi's boots getting stuck on spark plugs and separating from the coil which could be really annoying to deal with.

Edit: Correction for some of my misinformation, I think the Delphi coils are only sold as OEM, which are the Chinese made ones, but the Genuine ones are made in Portugal.

[moproblems]

I just use Eldor coils. They work great.

[Slideways]

The Delphi coils with part number 12138616153 say "made in Portugal" on the box.

The superseeded Bosch coils are currently made in Slovenia. Before, they were made in Germany. There are tons of pulled "made in Germany" Bosch coils on eBay for ~$20.

I'd go with either one.

[beemer_guy]

The Delphi coils with part number 12138616153 says "made in Portugal" on the box.

The superseeded Bosch coil is currently made in Slovenia. Before, they were made in Germany. There are tons of pulled "made in Germany" Bosch coils on eBay for ~$20.

I'd go with either one.

Here are the comparisons, left is OEM right is OE/Genuine: Differences in bold for Genuine, underline for OEM

• Both coils have a silver body, but the rubber thing above the boot on the Genuine is gray whereas on the OEM it is white
• On the tops of the coils, on the locking mechanism of the Genuine is a QR code, and the epoxy on the Genuine is white whereas on the OEM is black
• For the packaging, for some reason the Genuine is not packaged (same for all the boxes I received), and the OEM is in plastic and surrounded by bubble wrap
• The Genuine box shows a more brass tone coil, and the OEM shows a silver tone, although again, the actual bodies look the same
• The Genuine box has a verification sticker/seal, and the OEM does not
• And the final obvious differences are the "Made In" text, logos, fonts, part # (Genuine is GN10571-12B1, OEM is GN10571-11B1), and lastly the Genuine box says "For BMW"

Probably overkill on the information side of things but I hope this helps.

For what it's worth, I've also heard good things about Eldor coils, and like Slideways mentioned the availability of cheap Bosch coils is also pretty nice.

[powerbait]

I just went through a misfire event at the tail end of a +1500 mile trip with original installed coils, from as far as I can tell. The wife came with the trailer to rescue me for the last couple hundred miles. I bought a Bosch coil for trouble troubleshooting but didn't like the fit, It didn't feel to "snap" in, also the flip up connector piece wouldn't eject to electrical plug. I went with a full set of Eldor coils I picked up locally at Uro Tuning's warehouse. They had the Dinan branded ones and their own brand which were a few buck cheaper and come in different colors, which I assume were all made in the same chinese factory. So far so good with the Eldor coils and new plugs.

[elrichmeister]

Replaced all coils in my car back in 2022, when one of my original coils went out. Decided to replace all 6 since they're so cheap and keep my old working ones as spares. Still working fine today and about 30k miles since then.

https://www.fcpeuro.com/products/bmw-direct-ignition-coil-eldor-12138657273

[beemer_guy]

I just went through a misfire event at the tail end of a +1500 mile trip with original installed coils, from as far as I can tell. The wife came with the trailer to rescue me for the last couple hundred miles. I bought a Bosch coil for trouble troubleshooting but didn't like the fit, It didn't feel to "snap" in, also the flip up connector piece wouldn't eject to electrical plug. I went with a full set of Eldor coils I picked up locally at Uro Tuning's warehouse. They had the Dinan branded ones and their own brand which were a few buck cheaper and come in different colors, which I assume were all made in the same chinese factory. So far so good with the Eldor coils and new plugs.

I read an pamphlet or similar that was released by Bosch that said their updated line didn't snap anymore and not to worry about it, since so many people were used to it and were asking them about it.

[332]

Here are the comparisons, left is OEM right is OE/Genuine: Differences in bold for Genuine, underline for OEM

• Both coils have a silver body, but the rubber thing above the boot on the Genuine is gray whereas on the OEM it is white
• On the tops of the coils, on the locking mechanism of the Genuine is a QR code, and the epoxy on the Genuine is white whereas on the OEM is black
• For the packaging, for some reason the Genuine is not packaged (same for all the boxes I received), and the OEM is in plastic and surrounded by bubble wrap
• The Genuine box shows a more brass tone coil, and the OEM shows a silver tone, although again, the actual bodies look the same
• The Genuine box has a verification sticker/seal, and the OEM does not
• And the final obvious differences are the "Made In" text, logos, fonts, part # (Genuine is GN10571-12B1, OEM is GN10571-11B1), and lastly the Genuine box says "For BMW"

Probably overkill on the information side of things but I hope this helps.

For what it's worth, I've also heard good things about Eldor coils, and like Slideways mentioned the availability of cheap Bosch coils is also pretty nice.

solid info, i bought 1 coil from amazon and it was the made in china, going to return it and buy them from az. cheapest I could find them! thanks

[PSUEng]

I got Eldor from Bimmerworld. Haven't installed yet, part of my upcoming VANOS/valve adjust job.

[332]

$180 shipped is hard to beat!

[332]

Is this the same part? 128 shipped? ebay?

bmw coil.webp

[powerbait]

I would recommend against purchasing coils and plugs off amazon, I chased my tail for over a month with suspected counterfeit and/or bad name brand parts (Delphi and NGK) when doing the same for my n55 135i a year or so ago. Ended up going so far as replacing the injectors too because of multiple rounds of bad parts. FCP finally rescued me. Moral of the story is to purchase car parts from reputable shops.