N53 injector replacement
Discussion
Hi all
I’m readying myself for injector replacement time for my E91 325i. It’s the N53B30 engine with almost 60k on it, and it’s nearly 12 years old.
A couple of months ago, I started getting the smallest flutter on about one in five morning start-ups, after which no issues for the rest of the day (including later start-ups). More recently, there’s a bigger stutter for about three in five morning start-ups, after which no issues.
Obviously I’ll look into this in greater detail, but having read around on the matter, it does seem as though injectors are the probable culprit.
If indeed it is injectors, I’m wondering whether it’d be best to just take the hit and replace all six at once, to give me peace of mind. The plan currently is to keep this car going past 200k.
Cotswold quoted me £2,370 for a set of six. Ouch.
Any tips on how to proceed/how to source cheaper injectors would be much appreciated!
Thanks
I’m readying myself for injector replacement time for my E91 325i. It’s the N53B30 engine with almost 60k on it, and it’s nearly 12 years old.
A couple of months ago, I started getting the smallest flutter on about one in five morning start-ups, after which no issues for the rest of the day (including later start-ups). More recently, there’s a bigger stutter for about three in five morning start-ups, after which no issues.
Obviously I’ll look into this in greater detail, but having read around on the matter, it does seem as though injectors are the probable culprit.
If indeed it is injectors, I’m wondering whether it’d be best to just take the hit and replace all six at once, to give me peace of mind. The plan currently is to keep this car going past 200k.
Cotswold quoted me £2,370 for a set of six. Ouch.
Any tips on how to proceed/how to source cheaper injectors would be much appreciated!
Thanks
Fiedka said:
If I were you I would only replace the one that are faulty. That is assuming they are injectors.
Won’t work if using index 12, which don’t play nicely with older versions. You need to do one bank as a minimum, ideally all six.Op, where are you based? There seem to be a few specialists who can supply and fit them for c.£2.7k.
Also, try Sytner Leicester and quite Matt15 as a discount code to see if it’s cheaper. They’re dong a slightly bigger discount via Matt Armstrong.
Court_S said:
Fiedka said:
If I were you I would only replace the one that are faulty. That is assuming they are injectors.
Won’t work if using index 12, which don’t play nicely with older versions. You need to do one bank as a minimum, ideally all six.Op, where are you based? There seem to be a few specialists who can supply and fit them for c.£2.7k.
Also, try Sytner Leicester and quite Matt15 as a discount code to see if it’s cheaper. They’re dong a slightly bigger discount via Matt Armstrong.
Few years ago, N54 injectors on forums were a big no-no for N53. Since a few months they seem to have become interchangeable. Maybe similar story with replacing in banks?
I am happy to stand corrected but it is a lot of money.
What Specialists are you referring to? bMWMAN I used to go to in Heanor has closed down and I have been looking for a good one ever since.
I am based on Derby.
Fiedka said:
Has this been actually confirmed or is it just an internet rumour?
Few years ago, N54 injectors on forums were a big no-no for N53. Since a few months they seem to have become interchangeable. Maybe similar story with replacing in banks?
I am happy to stand corrected but it is a lot of money.
What Specialists are you referring to? bMWMAN I used to go to in Heanor has closed down and I have been looking for a good one ever since.
I am based on Derby.
These guys are in Coventry; Few years ago, N54 injectors on forums were a big no-no for N53. Since a few months they seem to have become interchangeable. Maybe similar story with replacing in banks?
I am happy to stand corrected but it is a lot of money.
What Specialists are you referring to? bMWMAN I used to go to in Heanor has closed down and I have been looking for a good one ever since.
I am based on Derby.
https://protuner.co.uk/products/bmw-n54-index-12-f...
They also state that old injectors (pre index 10) don’t play nicely with the new ones due to a different calibration. There seems to be the odd person who has managed it, but everything else points to it not working.
The injector on cylinder six in my car was leaking but I managed to sort it with a good, used one. A full set is a load of cash, hence me having a used one for now. I also bought a working set of index 9’s from a PHer as a back up.
Court_S said:
Op, where are you based? There seem to be a few specialists who can supply and fit them for c.£2.7k.
Also, try Sytner Leicester and quite Matt15 as a discount code to see if it’s cheaper. They’re dong a slightly bigger discount via Matt Armstrong.
I’m in south-east London. The specialists you mention - would they be fitting index 12?Also, try Sytner Leicester and quite Matt15 as a discount code to see if it’s cheaper. They’re dong a slightly bigger discount via Matt Armstrong.
Will try Matt at Synter Leicester - thanks for the tip
TGCOTF-dewey said:
Have you tried injector tune? They replace all the seals, and ultrasonically clean them.
It's not expensive and at that mileage spray pattern is probably poor on all of them.
Research I’ve done suggests cleaning them doesn’t prolong their life all that much - but happy to stand corrected!It's not expensive and at that mileage spray pattern is probably poor on all of them.
meddler said:
Court_S said:
meddler said:
£3,390…yikes
Did you try Matt15 as a discount code?
They’re £351 each from ML Performance
https://www.mlperformance.co.uk/products/genuine-b...
Court_S said:
Jesus, that’s expensive. That’s £615 per injector!
They’re £351 each from ML Performance
https://www.mlperformance.co.uk/products/genuine-b...
Ah that’s really helpful, thanks - cheapest I’ve seen so far. Although they’re index 11 rather than index 12 - is there a major difference? They’re £351 each from ML Performance
https://www.mlperformance.co.uk/products/genuine-b...
meddler said:
TGCOTF-dewey said:
Have you tried injector tune? They replace all the seals, and ultrasonically clean them.
It's not expensive and at that mileage spray pattern is probably poor on all of them.
Research I’ve done suggests cleaning them doesn’t prolong their life all that much - but happy to stand corrected!It's not expensive and at that mileage spray pattern is probably poor on all of them.
meddler said:
Ah that’s really helpful, thanks - cheapest I’ve seen so far. Although they’re index 11 rather than index 12 - is there a major difference?
Not sure TBH, I’ve focused more on the N54 injectors since that what is likely to bite me in the arse at some point. Before the shortage induced by Covid, they weren’t too expensive. I found an old ML Performance web page and the index 12’a were something like £147 each. The joys of supply and demand!
TGCOTF-dewey said:
meddler said:
TGCOTF-dewey said:
Have you tried injector tune? They replace all the seals, and ultrasonically clean them.
It's not expensive and at that mileage spray pattern is probably poor on all of them.
Research I’ve done suggests cleaning them doesn’t prolong their life all that much - but happy to stand corrected!It's not expensive and at that mileage spray pattern is probably poor on all of them.
idrussell said:
When my N53 530i injectors failed BMW replaced all six under warranty. As your under 60K miles it may be worth sticking a BMW warranty on the car and going that way if you have full service history..
This sounds like a very good idea - thank you. I have FSH by way of stamps in the service book, but not all the receipts (I’m the third owner, no idea where a couple of the early ones are) - which, according to the BMW warranty website, might be an issue. We’ll see.Quick quote on the website showed £608 annually with £100 excess and without roadside assistance. Which would be a saving of c. £2,000 if indeed all six were to be replaced…
How many miles was your 530i at when BMW decided to replace all six injectors? And were all six faulty?
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