[lordbmw]

On original injectors with over 80k miles. No issues so far.

Just wondering.

[Bimmer_Bro]

Originally Posted by lordbmw

On original injectors with over 80k miles. No issues so far.

Just wondering.

Depends what index you have. I believe 11 and 12 have proven to be a lot more reliable than earlier versions.

[lordbmw]

Originally Posted by Bimmer_Bro

Depends what index you have. I believe 11 and 12 have proven to be a lot more reliable than earlier versions.

It’s definitely not index 12 since it’s on original injectors. Probably index 9.

[nicky dj]

What year is your car? Index 1's are the best they ever made. Users stating 150k+ no issues. Index 12's are the next best. Anything in between is a crapshoot

[lordbmw]

Originally Posted by nicky dj

What year is your car? Index 1's are the best they ever made. Users stating 150k+ no issues. Index 12's are the next best. Anything in between is a crapshoot

2010

[nicky dj]

Originally Posted by lordbmw

2010

Yeah you're probably in between.

[Emilime75]

I have a 2010 and it had index 9s. Currently at 66k miles and had a couple leaking by around 60k. Replaced them all with 12s.

[lordbmw]

Well, hopefully mine will make it to 100k.
How do you know if your injectors are failing.

[stewbets]

Long cranks, stumbling after starting, AFR not shooting up to 235 immediately when letting off the gas.

[zomski101]

Around 40-50k miles when running e85 for me. Already on my 2nd set of index 12 injectors.

[R3dLeader]

Originally Posted by nicky dj

What year is your car? Index 1's are the best they ever made. Users stating 150k+ no issues. Index 12's are the next best. Anything in between is a crapshoot

Anyone have some facts to backup the bolded part? I'm still on index 1 but just crossed 4000 miles lol.

Seems the price of index 12 goes up everyday so I'd love to have more confidence in my index 1s moving forward. Especially when I see an E30 blend in my near future...

EDIT: found this. Good info. I am also 02/2007 build date with index 1.

https://www.e90post.com/forums/showthread.php?t=1279297

Now my HPFP on the other hand.....cringe.

[Dave92N54]

Originally Posted by R3dLeader

Anyone have some facts to backup the bolded part? I'm still on index 1 but just crossed 4000 miles lol.

Seems the price of index 12 goes up everyday so I'd love to have more confidence in my index 1s moving forward. Especially when I see an E30 blend in my near future...

EDIT: found this. Good info. I am also 02/2007 build date with index 1.

https://www.e90post.com/forums/showthread.php?t=1279297

Now my HPFP on the other hand.....cringe.

I don't have any hard evidence but I too have heard the Index 1s seem to last pretty well.

You're right on the HPFP though, lol

[CarAbuser]

There's not always obvious symptoms that the injectors are failing. I've seen leaking injectors that look fine in logs and idle perfectly.

What you really want to avoid is fuel dilution of the oil. Smell the oil when you change it, it's pretty obvious when you have dilution issues. You could even take the oil cap off and have a sniff when the car has warmed up a bit.

[Dave92N54]

Originally Posted by CarAbuser

There's not always obvious symptoms that the injectors are failing. I've seen leaking injectors that look fine in logs and idle perfectly.

What you really want to avoid is fuel dilution of the oil. Smell the oil when you change it, it's pretty obvious when you have dilution issues. You could even take the oil cap off and have a sniff when the car has warmed up a bit.

Not trying to be "that guy" but this isn't a very good test. We can't really tell how much fuel is in oil based on smell. It either smells like fuel, or doesn't.

I've had plenty of oil analysis done, each come back with fuel being less than 1% (and black stone says up to 2% is perfect) yet, despite 10k old index 12 injectors and no fuel on plugs ever, my oil always smells like fuel. I can change my oil, drive for 30 miles, and it'll smell like fuel.

[CarAbuser]

Originally Posted by Dave92N54

Not trying to be "that guy" but this isn't a very good test. We can't really tell how much fuel is in oil based on smell. It either smells like fuel, or doesn't.

I've had plenty of oil analysis done, each come back with fuel being less than 1% (and black stone says up to 2% is perfect) yet, despite 10k old index 12 injectors and no fuel on plugs ever, my oil always smells like fuel. I can change my oil, drive for 30 miles, and it'll smell like fuel.

Oil shouldn't smell like fuel. Certainly not normal. If the oil analysis says it's OK and you can smell fuel in the oil after only 30 miles then maybe your nose is playing up

[Dave92N54]

Originally Posted by CarAbuser

Oil shouldn't smell like fuel. Certainly not normal. If the oil analysis says it's OK and you can smell fuel in the oil after only 30 miles then maybe your nose is playing up

I've had others smell it and they agree it smells like fuel.

At this point, i've come to the conclusion that it's a turbo DI car (which are known for blowby) that is known for lots of blowby (so more blowby).

I've been collecting parts getting ready to go on, currently in a 5 week summer class while working so i've had next to no free time at all. Low side catch can is just waiting, hoping to see if it makes a difference. Will likely have turbos, opg and rod bearings done by the end of summer, not that any of those should contribute to the smell but, worth noting. I've been teasing the idea of just warrantying all 6 index 12s when I do the turbos on the off chance they're leaking in such a minute manner I can't find any on the plugs and it doesn't really dilute my oil.

[R3dLeader]

Originally Posted by Dave92N54

Not trying to be "that guy" but this isn't a very good test. We can't really tell how much fuel is in oil based on smell. It either smells like fuel, or doesn't.

I've had plenty of oil analysis done, each come back with fuel being less than 1% (and black stone says up to 2% is perfect) yet, despite 10k old index 12 injectors and no fuel on plugs ever, my oil always smells like fuel. I can change my oil, drive for 30 miles, and it'll smell like fuel.

Originally Posted by Dave92N54

I've had others smell it and they agree it smells like fuel.

At this point, i've come to the conclusion that it's a turbo DI car (which are known for blowby) that is known for lots of blowby (so more blowby).

Same on my Audi engine with 120k miles. Oil smells like fuel and when I got a Blackstone analysis done it was <1% fuel which is totally OK.

Hell, when I bought this 335i with 3300 miles on it, first thing I did was change the oil and it had a slight fuel smell to it. Previous owner changed it yearly but only drove 3300 miles in 14 years

[Dave92N54]

Originally Posted by R3dLeader

Same on my Audi engine with 120k miles. Oil smells like fuel and when I got a Blackstone analysis done it was <1% fuel which is totally OK.

Hell when I bought this 335i with 3300 miles on it, first thing I did was change the oil and it had a slight fuel smell to it. Previous owner changed it yearly but only drove 3300 miles in 14 years

Yeah, I figured I'm not alone in this situation. I still change my oil frequently as all hell out of paranoia (usually before I even hit 3k miles).

Also your car (being that it's likely one of the lowest mileage examples in existence) exhibiting the same makes me feel much better about it.

[E93Dude]

I have 07/03 build E93 with 102k - all original index 1, EXCEPT for #6, which started throwing codes about 7 months ago. Nearly fourteen years until failure seems not too bad for any BMW part. I was appalled at cost of new/reman index-12s, so I bought a three-pack of used index-9s for $95. I have one in the #6 position now, and everything is running fine (with two more as back up). Am still pissed that the 07/03 builds missed eligibility for the BMW injector recall by one month....

Just for a test, I'm tempted to have the "broken" index-1 professionally cleaned for a few bucks and then reuse it. I wonder if it's really crapped out, or just needed to be professionally cleaned. injectorrx.com in Houston has a mail in service that is reasonably priced. It still baffles me why the BMW injectors have become so expensive, apart from corporate greed.

If you replace your injectors, please take the time to program your ECU with the new injector specs - every injector has a unique calibration code associated with it based on QC testing at the factory. Your car will run without the programming, but you are asking for performance/mpg trouble if you don't.

[TyroneShoelaces]

Originally Posted by E93Dude

I have 07/03 build E93 with 102k - all original index 1, EXCEPT for #6, which started throwing codes about 7 months ago. Nearly fourteen years until failure seems not too bad for any BMW part. I was appalled at cost of new/reman index-12s, so I bought a three-pack of used index-9s for $95. I have one in the #6 position now, and everything is running fine (with two more as back up). Am still pissed that the 07/03 builds missed eligibility for the BMW injector recall by one month....

Just for a test, I'm tempted to have the "broken" index-1 professionally cleaned for a few bucks and then reuse it. I wonder if it's really crapped out, or just needed to be professionally cleaned. injectorrx.com in Houston has a mail in service that is reasonably priced. It still baffles me why the BMW injectors have become so expensive, apart from corporate greed.

If you replace your injectors, please take the time to program your ECU with the new injector specs - every injector has a unique calibration code associated with it based on QC testing at the factory. Your car will run without the programming, but you are asking for performance/mpg trouble if you don't.

OK I'm kinda curious here. I just bought a copart donor car for my n54 wagon swap. It has what appears to be a stage 2 build on it. It's an 07 running 01 injectors. I'll have the car down for a bit during the build and considered sending them away for cleaning. In boats it's really common to have yamaha injectors cleaned. Anyway with a shocking cost of $1200 for index 12's how reliable is the cleaning service? Does it fix common issues?

Also your signature mentioning coding injectors. Do the flow the same after coming back from cleaning or do they recalibrate and you input new values?

[E93Dude]

Originally Posted by TyroneShoelaces

OK I'm kinda curious here. I just bought a copart donor car for my n54 wagon swap. It has what appears to be a stage 2 build on it. It's an 07 running 01 injectors. I'll have the car down for a bit during the build and considered sending them away for cleaning. In boats it's really common to have yamaha injectors cleaned. Anyway with a shocking cost of $1200 for index 12's how reliable is the cleaning service? Does it fix common issues?

Also your signature mentioning coding injectors. Do the flow the same after coming back from cleaning or do they recalibrate and you input new values?

Funny you mention Yamaha, b/c injectorrx.com specifically mentions that they work on Yamaha outboard motor injectors. As to whether or not you send your injectors off to professional cleaning, generally speaking I would say if it ain't broke, don't fix it. This does not fall into the key preventative maintenance items for BMW, like replacing serpentine belt, the "mickey mouse" flange, coolant hoses and so on that you should replace before they fail. I would see how the car runs with the injectors as-is. If they are rough, make sure its not something else, and perhaps run a couple cans of injector cleaner through your system first. If they are still on the fritz, then look at sending them off for cleaning. injectorrx.com is not particularly expensive, but try the cheaper alternatives first.

Regarding coding the injectors to your ECU, their calibration number is fixed. Cleaning them should ensure that their flow rate returns to what was measured in the factory - that measurement is encoded in a series of numbers printed on the side of the injector. That is the code you will need to input into a software package like INPA, or (in my case) Pro Tools. In both cases you will need a bluetooth or cable connector plugged into your OBDII port. You can usually find INPA on the internet for free, but its not the most use friendly, and it requires a PC - it is by far the most comprehensive diagnostic tool for your BMW, though. Pro Tools is an "app" can be run on any Android tablet or phone, but its about $75 for the diagnostic package that includes injector and battery coding feature. I have it loaded onto an old tablet that I keep in my car.

Here is a very good video on how to replace and code BMW injectors with INPA. There are similar ones for Pro Tool if you search Youtube.

[mweisdorfer]

Originally Posted by lordbmw

On original injectors with over 80k miles. No issues so far.

Just wondering.

I got 151,000 miles on my index 1's 😂