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      03-29-2020, 06:42 PM   #23
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Yes I spent my day researching this topic. I am almost steered away from N55 due to this issue and sticking to the M57 diesel engine lol.

I am not convinced the issue is related to oil filter gasket. I believe this is just purely coincident as what does oil filter gasket has to do with rod bearing issue.

I also did search other websites and it mentions an issue with oil starvation when making a turn at high speed (or while revving car at higher RPMs) but of course there is not "yet" a proof to this theory
The oil starvation seems like it would be less of a concern in an X5 compared to the 3/4 series where I think I was seeing that reported. Assuming you're monitoring your oil level, I just don't know that an X5 would see the same amount of spirited driving as maybe those vehicles are subjected to.

I haven't researched the diesel, does that seem to have fewer issues?
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      03-29-2020, 07:34 PM   #24
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Where are you reading about rod bearing issues?
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      03-29-2020, 08:01 PM   #25
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Quote:
Originally Posted by RedBent View Post
The oil starvation seems like it would be less of a concern in an X5 compared to the 3/4 series where I think I was seeing that reported. Assuming you're monitoring your oil level, I just don't know that an X5 would see the same amount of spirited driving as maybe those vehicles are subjected to.

I haven't researched the diesel, does that seem to have fewer issues?
Diesel engine and transmisaions are proven to be bullet proof. However, it is the emission systems that fail on the car eapecially at higher mileage. I can live with emission related issues as I can delete the systems later but engine failure like seen (even though it is rare) is expensive and hard to live with
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      03-29-2020, 08:03 PM   #26
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Originally Posted by turboawd View Post
Where are you reading about rod bearing issues?

Google search N55 and rod bearing issue. You will get some links with people reporting metallic knock coming from engine when revving.

There is even a member listing his car with this issue for 15k right now

Last edited by Honda; 03-29-2020 at 08:57 PM..
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      03-29-2020, 08:07 PM   #27
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Which year model is your car?
This happened in my 2011 F25 X3 (same motor). I have 42K on my F15 and honestly not worried. Keep up with maintenance and you will be fine. For every "issue" you read about there are tons of ones out there that are fine. The N55 is a solid motor and that opinion also comes from friends that are BMW mechanics at dealers.
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      03-29-2020, 08:34 PM   #28
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Quote:
Originally Posted by Honda View Post
Diesel engine and transmisaions are proven to be bullet proof. However, it is the emission systems that fail on the car eapecially at higher mileage. I can live with emission related issues as I can delete the systems later but engine failure like seen (even though it is rare) is expensive and hard to live with
Any common issues on the emissions side that you have been finding in your research?
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      03-29-2020, 08:59 PM   #29
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Any common issues on the emissions side that you have been finding in your research?
DPF getting clogged, EGR coolant and/or SCR. Honestly, If I plan to get diesel (which I might end up doing this), I will do the ABC delete.

The thing is 35d is sold for higher price than 35i on used market (on average). It looks like they do maintain higher resale value.
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      03-29-2020, 09:01 PM   #30
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Originally Posted by momoboy View Post
This happened in my 2011 F25 X3 (same motor). I have 42K on my F15 and honestly not worried. Keep up with maintenance and you will be fine. For every "issue" you read about there are tons of ones out there that are fine. The N55 is a solid motor and that opinion also comes from friends that are BMW mechanics at dealers.
I agree with you however, I had 3 e9X M3 and this rod bearing things was all over my mind to the point I stopped enjoying the car from the fear of issue happen while driving.
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      03-30-2020, 07:00 AM   #31
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I agree with you however, I had 3 e9X M3 and this rod bearing things was all over my mind to the point I stopped enjoying the car from the fear of issue happen while driving.
While I hear you it seems you are trying to talk yourself out of anything with an N55 motor. There are no big issues with it. The water pump and the oil filter housing are the ones we know about. Those are maintenance aspects. It's a reliable motor and there are many members that have 100,000 miles plus on the motor with no issues. My X3 had 87,000 with no issues. It's not a Ferrari and you shouldn't fear driving it. Just maintain it and you are fine.

Here is one for sale with over 200K:

https://f15.bimmerpost.com/forums/sh....php?t=1707560

Last edited by momoboy; 03-30-2020 at 07:11 AM..
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      03-30-2020, 08:08 AM   #32
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Yes, F15 N55 does have the electric water pump like the E90.
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      03-30-2020, 08:16 AM   #33
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Yes, F15 N55 does have the electric water pump like the E90.
Is it the same waterpump though? Or is it from different brand/part number? The question that is asked by some, will waterpump fail prematurely at 60-80k like the e90 N55 does?
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      03-30-2020, 08:30 AM   #34
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Quote:
Originally Posted by momoboy View Post
While I hear you it seems you are trying to talk yourself out of anything with an N55 motor. There are no big issues with it. The water pump and the oil filter housing are the ones we know about. Those are maintenance aspects. It's a reliable motor and there are many members that have 100,000 miles plus on the motor with no issues. My X3 had 87,000 with no issues. It's not a Ferrari and you shouldn't fear driving it. Just maintain it and you are fine.

Here is one for sale with over 200K:

https://f15.bimmerpost.com/forums/sh....php?t=1707560
I am not trying to talk out of it but I am looking for any potential issue I may have as I usually keep my cars for long time and want to end up pouring money on it for fixing issues
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      03-30-2020, 09:12 AM   #35
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Quote:
Originally Posted by Honda View Post
Is it the same waterpump though? Or is it from different brand/part number? The question that is asked by some, will waterpump fail prematurely at 60-80k like the e90 N55 does?
I believe it's a different part, but still an electric wp. I think the larger issue with an electric wp vs mechanical, is you don't get much/any warning when it fails. A mechanical pump will start leaking, make noise, etc., before it fails. I don't think 60-80k miles is premature really, it just could abruptly dies. At the end of the day, not a huge deal IMO.
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      03-30-2020, 09:43 AM   #36
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Quote:
Originally Posted by Honda View Post
I am not trying to talk out of it but I am looking for any potential issue I may have as I usually keep my cars for long time and want to end up pouring money on it for fixing issues
Any BMW as you know can cost money to maintain but is there are no inherent big issues with the N55. It's not plagued with issues and is a tried and true platform. There are countless examples of this motor going way beyond 100,000 miles with nothing but regular maintenance.

Last edited by momoboy; 03-30-2020 at 10:34 AM..
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      03-30-2020, 09:48 AM   #37
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much of it is luck i think. you can get a car with 99% track record and end up being the 1% with non-stop issues, or the POS track record car that everyone always has issues with and you skate by. There will always be potential issues, even with cars that have super clean track record.
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      03-30-2020, 10:37 AM   #38
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Originally Posted by Reign2016 View Post
much of it is luck i think. you can get a car with 99% track record and end up being the 1% with non-stop issues, or the POS track record car that everyone always has issues with and you skate by. There will always be potential issues, even with cars that have super clean track record.
True. That can happen with any car, not just BMW. Look at Hyundai which is supposed to be bulletproof. They are having issues with rod bearings in their 2.0 motors and now and did a recall to check them.
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      03-30-2020, 11:06 AM   #39
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True. That can happen with any car, not just BMW. Look at Hyundai which is supposed to be bulletproof. They are having issues with rod bearings in their 2.0 motors and now and did a recall to check them.
That's sad that hyundai knew about the issue years ago, yet didn't change the design and are still having issues.
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      03-30-2020, 11:10 AM   #40
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That's sad that hyundai knew about the issue years ago, yet didn't change the design and are still having issues.
Exactly! BMW has been going through this path as well. Look at e9X M3, BMW never issued a recall or anything to address it because of cost and not to screw their revenue. BMW would issue a recall if it is only a safety/hazard concern.
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      03-30-2020, 11:20 AM   #41
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Exactly! BMW has been going through this path as well. Look at e9X M3, BMW never issued a recall or anything to address it because of cost and not to screw their revenue. BMW would issue a recall if it is only a safety/hazard concern.
If you talk to a hyundai dealer, they replace several engines a week. The bmw issue is nowhere near that bad. And honestly, a good portion of the bmw failures are probably from abuse and modification. Plus the x5 is not typically a car that someone is going to race around in and abuse.
And apart from the guy currently selling his x5 with a bad motor in the classifieds, I don't recall anyone ever posting about 35i engine issues on here. And just compare that to the thousands of x5s made every year.
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      03-30-2020, 12:43 PM   #42
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Originally Posted by turboawd View Post
If you talk to a hyundai dealer, they replace several engines a week. The bmw issue is nowhere near that bad. And honestly, a good portion of the bmw failures are probably from abuse and modification. Plus the x5 is not typically a car that someone is going to race around in and abuse.
And apart from the guy currently selling his x5 with a bad motor in the classifieds, I don't recall anyone ever posting about 35i engine issues on here. And just compare that to the thousands of x5s made every year.
Well said. I am friends with various BMW specialists (both at dealers and private) All agree the N55 is a good motor with no known issues. Yes, there can be a bad one as nothing is perfect but for most owners it is a very reliable engine.
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      03-31-2020, 08:13 AM   #43
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Quote:
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Quote:
Originally Posted by RedBent View Post
I'm in a similar boat as you - researching the F15; I came across a few threads about this as well related to the N55. I only skimmed a few, but sounds like some had the issue after the oil filter gasket housing replacement for some reason.

Seems to happen fairly indiscriminately to older/newer MYs and high/low mileage engines. I'm sure you've read a lot of the same threads from the various message boards as well though.
Yes I spent my day researching this topic. I am almost steered away from N55 due to this issue and sticking to the M57 diesel engine lol.

I am not convinced the issue is related to oil filter gasket. I believe this is just purely coincident as what does oil filter gasket has to do with rod bearing issue.

I also did search other websites and it mentions an issue with oil starvation when making a turn at high speed (or while revving car at higher RPMs) but of course there is not "yet" a proof to this theory
The n55 is a solid engine. I have one with 20k and one with 140k, can't tell the difference.
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      02-25-2024, 07:10 PM   #44
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Quote:
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The n55 is a solid engine. I have one with 20k and one with 140k, can't tell the difference.
I'm looking at a few used BMW X5 xDrive35i (2018 to 2022) and totally unfamiliar with the range.

I'd welcome and positive and negative comments and advice on my hunt for a replacement for my wife's Mustang V6 that she totaled this weekend.

BTW, I have a 2013 BMW K1600 straight 6 motorcycle and its fantastic.

I do all the wrenching on our cars and bike and keen to find links to the maintenance requirements.

Thanks.
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