N53 injectors

OliSharp · 02-13-2023, 10:02 AM

Has anyone mixed index 11 with index 12?

I already have 3x index 11 installed (one bank) and just bought 3 new injectors from the main dealer hoping they’d also be index 11. What arrived in the post is index 12. When I questioned the dealer on this they told me that’s all that’s available through the dealer network.

So the question is, has anyone recently replaced just 3 injectors and how did you get on?

I know ideally I would replace all 6 but at £2,400 I’m not sure the car is worth it.

Phil325i · 02-14-2023, 03:10 AM

They will be injectors originally intended for the N54 engine. N53 injectors are pretty much unavailable, so they're obviously substituting the N54 ones. As far as I know, if you're using the N54 injectors you must change all six. It's what I did when my N53's packed up and new ones weren't available. Worked fine with no issues so far. In fact I'd heard that BMW were due to 'combine' the injectors for both engines under one part number.

0l0dom0l0 · 02-14-2023, 01:33 PM

What is the part number you ordered and what is the part number on the injectors that have arrived?

OliSharp · 02-14-2023, 01:46 PM

Same part number I used when I bought index 11.

I was discussing injectors with Cotswold in November, at the time they offered to supply 11s and said 12s were reserved for cars booked in with them for work.

Looks like now it’s just 12s for n53 and n54

0l0dom0l0 · 02-15-2023, 01:36 AM

What is the part number on the injector? Is it ending 048 or 261?

If it is 261 they've sent you the N54 injectors. You can still get the 048s, and for less than cotswold want.

There are also other places selling the 261 injectors for sub £300.

Phil325i · 02-15-2023, 05:11 AM

Come on dom, reveal all! Where have you found N53's available?

0l0dom0l0 · 02-15-2023, 09:36 AM

Ebay item 265738008598 from Lloyd Colne BMW for example.

whyzee125 · 02-15-2023, 01:27 PM

Completely fine to run one one bank with a certain index and the other bank with another. Furthermore, 11 and 12 can even mix in one bank with no issues. You aren't supposed to mix 1-10 with 11-12 on the same bank though.

0l0dom0l0 · 02-15-2023, 02:58 PM

As far as I'm aware, N53 injectors with part number ending 048 only go up to index 11.

N54 injectors ending part number 261 go up to revision 12.

Op, can you confirm the part number on your injectors please and or upload a photo?

martinfc · 02-16-2023, 01:07 PM

Quote:

Originally Posted by whyzee125

Completely fine to run one one bank with a certain index and the other bank with another. Furthermore, 11 and 12 can even mix in one bank with no issues. You aren't supposed to mix 1-10 with 11-12 on the same bank though.

Do you have a source for this (other than Internet hearsay)? I've never been able to find a credible source for this. My N53 has run fine for several years with a mix of 9s and 11s across both banks.

whyzee125 · 02-16-2023, 01:41 PM

Quote:

Originally Posted by martinfc

Do you have a source for this (other than Internet hearsay)? I've never been able to find a credible source for this. My N53 has run fine for several years with a mix of 9s and 11s across both banks.

The shop I use said it's in their technical service data. I said technically bc a lot of people do it with no problems, but most shops won't, whereas back in the day they were "allowed" to say put an index 9 in a bank of 7's.

micdev42 · 06-08-2023, 11:43 AM

Quote:

Originally Posted by 0l0dom0l0

Ebay item 265738008598 from Lloyd Colne BMW for example.

Does that look new to you?
Also it makes no mention of index as far as I can see.

02-13-2023, 10:02 AM	#1
OliSharp Private 9 Rep 61 Posts Drives: E93 330i Highline MSport Join Date: Jan 2019 Location: SW London iTrader: (0)	N53 injectors Has anyone mixed index 11 with index 12? I already have 3x index 11 installed (one bank) and just bought 3 new injectors from the main dealer hoping they’d also be index 11. What arrived in the post is index 12. When I questioned the dealer on this they told me that’s all that’s available through the dealer network. So the question is, has anyone recently replaced just 3 injectors and how did you get on? I know ideally I would replace all 6 but at £2,400 I’m not sure the car is worth it.
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02-14-2023, 03:10 AM	#2
Phil325i Brigadier General 616 Rep 3,194 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	They will be injectors originally intended for the N54 engine. N53 injectors are pretty much unavailable, so they're obviously substituting the N54 ones. As far as I know, if you're using the N54 injectors you must change all six. It's what I did when my N53's packed up and new ones weren't available. Worked fine with no issues so far. In fact I'd heard that BMW were due to 'combine' the injectors for both engines under one part number. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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02-14-2023, 01:33 PM	#3
0l0dom0l0 First Lieutenant 69 Rep 316 Posts Drives: BMW E92 330i Join Date: Jun 2020 Location: Uk iTrader: (0)	What is the part number you ordered and what is the part number on the injectors that have arrived?
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02-14-2023, 01:46 PM	#4
OliSharp Private 9 Rep 61 Posts Drives: E93 330i Highline MSport Join Date: Jan 2019 Location: SW London iTrader: (0)	Same part number I used when I bought index 11. I was discussing injectors with Cotswold in November, at the time they offered to supply 11s and said 12s were reserved for cars booked in with them for work. Looks like now it’s just 12s for n53 and n54
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02-15-2023, 01:36 AM	#5
0l0dom0l0 First Lieutenant 69 Rep 316 Posts Drives: BMW E92 330i Join Date: Jun 2020 Location: Uk iTrader: (0)	What is the part number on the injector? Is it ending 048 or 261? If it is 261 they've sent you the N54 injectors. You can still get the 048s, and for less than cotswold want. There are also other places selling the 261 injectors for sub £300.
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02-15-2023, 05:11 AM	#6
Phil325i Brigadier General 616 Rep 3,194 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Come on dom, reveal all! Where have you found N53's available? __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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02-15-2023, 09:36 AM	#7
0l0dom0l0 First Lieutenant 69 Rep 316 Posts Drives: BMW E92 330i Join Date: Jun 2020 Location: Uk iTrader: (0)	Ebay item 265738008598 from Lloyd Colne BMW for example.
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02-15-2023, 01:27 PM	#8
whyzee125 Brigadier General 1679 Rep 3,645 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	Completely fine to run one one bank with a certain index and the other bank with another. Furthermore, 11 and 12 can even mix in one bank with no issues. You aren't supposed to mix 1-10 with 11-12 on the same bank though.
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02-15-2023, 02:58 PM	#9
0l0dom0l0 First Lieutenant 69 Rep 316 Posts Drives: BMW E92 330i Join Date: Jun 2020 Location: Uk iTrader: (0)	As far as I'm aware, N53 injectors with part number ending 048 only go up to index 11. N54 injectors ending part number 261 go up to revision 12. Op, can you confirm the part number on your injectors please and or upload a photo?
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