R50/R53 :: Hatch Talk (2002-2006) Cooper (R50) and Cooper S (R53) hatchback discussion.

R50/53 Aftermarket 380 Jcw fuel injectors

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Old Feb 13, 2026 | 07:37 PM
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Aftermarket 380 Jcw fuel injectors

Has anyone tried the 4 x FUEL INJECTORS for BMW MINI JOHN COOPER R52 R53 S JCW WORKS 0391511 380cc sold by Ksm Motorsports, if their any good ?
 

Last edited by Tombstone; Feb 13, 2026 at 08:03 PM.
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Old Feb 14, 2026 | 05:39 AM
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I can’t comment on those particular injectors, but only the OEM has 2 nozzles, and all the aftermarket are 4, and usually made in China. You can get the same “unknown brand” set from Walmart at half the price, if that gives you an idea. I’ve never heard anything good about them, always bad. Better off picking up a used OEM set and have them cleaned and tested.
 
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Old Feb 14, 2026 | 09:23 AM
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ECS still has these listed

https://www.ecstuning.com/b-bavarian...3537574132kt1/

I got these, but are still on the shelf.
 
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Old Feb 14, 2026 | 10:00 AM
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I was talking with Adrian the tuner guy last week about tuning my car and I had to convince him my OG JCW injectors weren’t knock offs because he said real had 4 nozzle and fake had 2. I think there may be either a change along the way or just confusion. I’m new back in the mini game. I saw the pics on waymotorworks and others show 2 nozzle as well. Here are my for sure real and rusty JCW injectors. (I bought an eBay injector cleaner and flow tester for like $90 just since they’re old and I can show diff between these and R53 injectors when I pull them)




 
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Old Feb 14, 2026 | 12:05 PM
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I can also confirm with you -The genuine Seimens/JCW 380cc injectors have 2 nozzles. Not 4.

There is a website where you can get an injector refresh kit for the 340cc & 380cc - It comes with new screens and O-rings. If I recall; the website is called "mr.injector"(?)...
or something like that (sorry, I don't have my bookmarks on hand). The kit is not listed but you'll have to email them.
 

Last edited by Here2Go; Feb 14, 2026 at 12:34 PM.
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Old Feb 15, 2026 | 07:39 AM
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These are what I got from that ECS link - old Bav Autosport.



These are 2 hole - yes made in China.
These are 2 hole - yes made in China.
 
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Old Feb 15, 2026 | 08:15 AM
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They’ve got pretty bad reviews overall, which are generally poor, with many users reporting them as unreliable, inconsistent, and potentially "cheap Chinese knockoffs" causing misfires, poor fuel trims, and severe, sometimes unfixable, running issues. While some users report success, most recommend avoiding them.
 
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Old Feb 15, 2026 | 08:28 AM
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Well, good to know. Leaving it alone for now. It has a Dinan pulley, a Dinan airbox, and a UUC catback.
 
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Old Feb 15, 2026 | 11:16 AM
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Originally Posted by noodlesandsam
ECS still has these listed

https://www.ecstuning.com/b-bavarian...3537574132kt1/

I got these, but are still on the shelf.
Chinese **** mate, send them back, not good.
 
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Old Feb 15, 2026 | 12:41 PM
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Originally Posted by Jonny
I can’t comment on those particular injectors, but only the OEM has 2 nozzles, and all the aftermarket are 4, and usually made in China. You can get the same “unknown brand” set from Walmart at half the price, if that gives you an idea. I’ve never heard anything good about them, always bad. Better off picking up a used OEM set and have them cleaned and tested.
Thats interesting because recently I was in contact with ADRIAN, here on NAM, and I was asking him for a set of good 380cc injectors and he sent me a link to bosche 380cc with 4 nozzles. Does that mean those injectors are also made in china? It was by bosche. I purchased them from fcp euro.
 
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Old Feb 15, 2026 | 03:35 PM
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Originally Posted by ttawfik3
Thats interesting because recently I was in contact with ADRIAN, here on NAM, and I was asking him for a set of good 380cc injectors and he sent me a link to bosche 380cc with 4 nozzles. Does that mean those injectors are also made in china? It was by bosche. I purchased them from fcp euro.
Bosche ones are good to use assuming real and I trust the aftermarket injectors Adrian suggests, this is just for OEM JCW 380cc injectors, which I see are kinda crazy money now.
 
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Old Feb 15, 2026 | 06:07 PM
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I've been running eBay aftermarket 380cc injectors on my MC40 for four years (tuned by Adrian) with no issues. They were flow-tested at a full 380cc. Here's a link to a company that can both clean and flow-test your injectors for $12.50 each: https://highperformanceinjectors.com...rvice-business
 
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Old Feb 15, 2026 | 07:53 PM
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I also replaced my original JCW injectors with these Bosch units. No issues so far, and not a rip off like the genuine JCW injectors. https://www.fcpeuro.com/products/aud...tro-0280156063
 
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Old Feb 16, 2026 | 06:57 AM
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Originally Posted by GLEX
I also replaced my original JCW injectors with these Bosch units. No issues so far, and not a rip off like the genuine JCW injectors. https://www.fcpeuro.com/products/aud...tro-0280156063

did you need any adapters for them?
 
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Old Feb 16, 2026 | 07:40 AM
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No adapters needed for those Audi TT injectors. Only issue is the original injector to fuel rail locking clips don't match perfectly, but they seemed close enough that I didn't search for a better solution. I did change the o-rings to genuine MINI as I heard there could be a slight difference, but that was probably not really necessary.
 
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