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      12-30-2019, 06:20 AM   #1
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Hello all and happy new year. I am about to pull the trigger on a X5. I am trying to decide 40i vs m50i. Test drove both and love the sound and power of that powerful V8. Did my research online on that N63 engine and found so many issues, especially this high oil consumption problem. Considsring that the 2020 m50i outputs even more than 2019 50i, I have serious concerns about the longevity of this engine. My plan was to keep the car, so I am afraid one day I will be facing a huge bill to fix this issue. Anyone can share their thoughts on this? Thanks
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      12-30-2019, 06:23 AM   #2
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My point of view: you should never own a modern BMW out of warranty. So get an extended warranty and enjoy the car for 7 years less a day.
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      12-30-2019, 06:32 AM   #3
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Originally Posted by LexxM3 View Post
My point of view: you should never own a modern BMW out of warranty. So get an extended warranty and enjoy the car for 7 years less a day.
Coming from a Honda owner experience, maybe I need to lower my expectations about the reliability of BMW? Trade off between reliability and power, would the N55 in the 40i be a more balanced than the N63?
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      12-30-2019, 06:39 AM   #4
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Originally Posted by LexxM3 View Post
My point of view: you should never own a modern BMW out of warranty. So get an extended warranty and enjoy the car for 7 years less a day.
Coming from a Honda owner experience, maybe I need to lower my expectations about the reliability of BMW? Trade off between reliability and power, would the N55 in the 40i be a more balanced than the N63?
Both engines are pretty awesome in the X5. The 8 is just awesome power, feel, and sound. The 6 is smooth and highly/surprisingly economical when driven with that intent and isn't a power and feel slouch by any means — one of the fastest SUVs on the road.

But while bimmers are driver's cars through and through, their general reliability has always been just average, yet always expensive to repair. Plus, in G05, there is so much tech that I feel it is guaranteed to be irreparable in a practical sense outside BMW dealership services (including self) when that starts to decay with age. So "only under warranty" is going to be my bimmer rule from X5 forward.

Oh, you were asking about the relative reliability of the two engines. Don't know, but with above philosophy, doesn't matter.
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      12-30-2019, 07:12 AM   #5
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Originally Posted by LexxM3 View Post
My point of view: you should never own a modern BMW out of warranty. So get an extended warranty and enjoy the car for 7 years less a day.
Anyone in Canada who has purchased extended warranty for these V8? How much did the dealer charge you?
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      12-30-2019, 07:33 AM   #6
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Quote:
Originally Posted by LexxM3 View Post
Both engines are pretty awesome in the X5. The 8 is just awesome power, feel, and sound. The 6 is smooth and highly/surprisingly economical when driven with that intent and isn't a power and feel slouch by any means ó one of the fastest SUVs on the road.

But while bimmers are driver's cars through and through, their general reliability has always been just average, yet always expensive to repair. Plus, in G05, there is so much tech that I feel it is guaranteed to be irreparable in a practical sense outside BMW dealership services (including self) when that starts to decay with age. So "only under warranty" is going to be my bimmer rule from X5 forward.

Oh, you were asking about the relative reliability of the two engines. Don't know, but with above philosophy, doesn't matter.
Good points. Thereís a thread going on about Consumer Report SUV ratings and how it has slipped on the G05. Well, Iím sure itís related to the technology of the new model not being ready for prime time. We shouldnít be test mules for their QC department, but I think itís a bold undertaking and as long as they fix the issues in a reasonable time frame, Iím ok. I can imagine that itís quite the challenge working with devices outside of their control, ie Apple, Google, etc. because these companies constantly issue new SW updates, and we all know well thought out those are. I am willing to take the time to get the updates installed for the pleasure this car affords. If it strands me in the desert, I will modify that last sentence. As you said, I wonít own it out of warranty either.

Sorry...got off point, I do think the I6 is and always has been their star in the engine lineup. Personally, while you may like the rumble and power of the V8, I want the sweet smoothness of the I6 for my daily driver and travel vehicle.
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      12-30-2019, 08:42 AM   #7
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Quote:
Originally Posted by zhangyi17 View Post
Hello all and happy new year. I am about to pull the trigger on a X5. I am trying to decide 40i vs m50i. Test drove both and love the sound and power of that powerful V8. Did my research online on that N63 engine and found so many issues, especially this high oil consumption problem. Considsring that the 2020 m50i outputs even more than 2019 50i, I have serious concerns about the longevity of this engine. My plan was to keep the car, so I am afraid one day I will be facing a huge bill to fix this issue. Anyone can share their thoughts on this? Thanks
Original N63 had the problems (E70 generation). F15 had N63TU and is very reliable. This V8 is 2 generations beyond F15 version.
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      12-30-2019, 09:17 AM   #8
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Original N63 had the problems (E70 generation). F15 had N63TU and is very reliable. This V8 is 2 generations beyond F15 version.
X2... Not a issue. I saw no oil loss on break-in after a 2200 mile trip. That was amazing considered this is when everything was breaking in and oil consumption is to be expected. FYI we also have a dip stick. These V8TT engines are the updated from the earlier ones that had some initial oil consumption issues.


Last edited by MystroX5; 12-30-2019 at 09:57 AM..
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      12-30-2019, 09:37 AM   #9
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Quote:
Originally Posted by zhangyi17 View Post
Quote:
Originally Posted by LexxM3 View Post
My point of view: you should never own a modern BMW out of warranty. So get an extended warranty and enjoy the car for 7 years less a day.
Coming from a Honda owner experience, maybe I need to lower my expectations about the reliability of BMW? Trade off between reliability and power, would the N55 in the 40i be a more balanced than the N63?
40i uses the B58B30M1 which is second gen version of the B58 engine.

50i uses the N63TU3 (slightly different variants in 50i and M50i). This is third generation of the engine. I wouldn't be concerned about problems with the earlier versions.
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      12-30-2019, 10:57 AM   #10
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Quote:
Originally Posted by claykin View Post
Quote:
Originally Posted by zhangyi17 View Post
Quote:
Originally Posted by LexxM3 View Post
My point of view: you should never own a modern BMW out of warranty. So get an extended warranty and enjoy the car for 7 years less a day.
Coming from a Honda owner experience, maybe I need to lower my expectations about the reliability of BMW? Trade off between reliability and power, would the N55 in the 40i be a more balanced than the N63?
40i uses the B58B30M1 which is second gen version of the B58 engine.

50i uses the N63TU3 (slightly different variants in 50i and M50i). This is third generation of the engine. I wouldn't be concerned about problems with the earlier versions.
This guy talks specifically about the problem with this latest generation of N63 engine. He names it as the most unreliable BMW engine

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      12-30-2019, 11:05 AM   #11
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check my oil analysis thread, the engine is fine, no issues at all with consumption
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      12-30-2019, 11:06 AM   #12
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This guy talks specifically about the problem with this latest generation of N63 engine. He names it as the most unreliable BMW engine

Ugh.... This guy wants to hear himself talk. This is the case when a little knowledge is dangerous. He has no clue about the amount of evolutions the engine he is talking about has had. “Hot V” setups are now used by MB, BMW, etc... It is the future of where the turbos are places. The BMW club magazine “Roundel” expanded this in depth and why it is superior. They also explain how the latest generation have addressed any oil consumption and heat issues.

The take away..... It is now a non issue. This is like tearing apart today’s current 911 engine because it’s in the same place as the 911 engines that had IMS issues 15 years ago.
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      12-30-2019, 12:06 PM   #13
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Quote:
Originally Posted by zhangyi17 View Post
Quote:
Originally Posted by claykin View Post
Quote:
Originally Posted by zhangyi17 View Post
Quote:
Originally Posted by LexxM3 View Post
My point of view: you should never own a modern BMW out of warranty. So get an extended warranty and enjoy the car for 7 years less a day.
Coming from a Honda owner experience, maybe I need to lower my expectations about the reliability of BMW? Trade off between reliability and power, would the N55 in the 40i be a more balanced than the N63?
40i uses the B58B30M1 which is second gen version of the B58 engine.

50i uses the N63TU3 (slightly different variants in 50i and M50i). This is third generation of the engine. I wouldn't be concerned about problems with the earlier versions.
This guy talks specifically about the problem with this latest generation of N63 engine. He names it as the most unreliable BMW engine

It was posted on the Internet so it must be authentic.

While this guy is right that the N63 has struggled with heat, oil consumption, etc. he did the 50i models a disservice by lumping them all together. The G05/G07 uses the technical update 3 version which has additional improvements including better heat shielding to protect components in the vee. This engine was first used during 2018 for 2019 G05/G07.

Where he's also wrong is he includes the 650i in the same sentence while discussing other models including the new 7 series, etc. The 650i never even used technical update 2 of the N63. The 650i used the original N63 and then the first technical update.
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      12-30-2019, 10:09 PM   #14
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I also think the inline 6 is the way to go for most people. I have the same engine in my 540i and it is just so satisfying in both the X5 and 540i.

The only BMW V8 i have driven was in a 2018 7 series that i was briefly thinking about trading in my 540i for but I changed my mind after the test drive. It was very hard to drive smoothly. It had too much torque. I felt like it just wanted to take off regardless of throttle pressure.

If you were shopping for an X7, i would say definitely get the V8 because the inline 6 struggles to move that beast around with the same ease as in the X5.
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