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 N57 Diesel Purchase Thoughts |
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| 08-04-2021, 11:06 AM | #1 |
AggieZig Private First Class    61Rep 106Posts Drives: 2010 E91 328xi Join Date: Sep 2017 Location: Los Angeles, CA iTrader: (0) Garage List2012 BMW E70 X5 35d [0.00]2010 BMW E91 328xi ... [0.00]1975 Porsche 914 2.0L [0.00] | N57 Diesel Purchase Thoughts Hi Everyone, Getting ready to pull the trigger on a 2014 X5 xDrive35D with just under 100k on the clock. I was originally looking at an E70 LCI 35D but the price difference between that and early F15 cars is negligible when you consider all of the changes between generations. So, I’ve found a car that has a great set of options and phenomenal service history. I also understand that these cars have a 10 year / 120k extended emissions warranty on many of the emissions components, which adds some peace of mind. I’ve been researching as much as I can about these cars and the N57 diesel engine but there’s not too much data out there yet, which could be a good or bad thing. It doesn’t look like too many folks have taken these cars much past 100k yet. From what I’ve read, the N57 is a huge improvement over the M57 in terms of efficiency and emissions-related reliability. However, I do see the occasional thread throwing out the idea that these engines might suffer from the same timing chain issues as their little brother, the N47. Does anyone have any concrete proof that there is any sort of catastrophic design flaw in the 3.0L N57 diesel engine? Or anything else in this drivetrain for that matter? I am fully prepared for the usual few grand per year in BMW upkeep (this is my fourth bimmer) but I can’t stomach the idea or costs of a $15k engine replacement. Looking forward to your feedback, any guidance is appreciated! |
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| 08-04-2021, 11:34 AM | #2 |
RED_Y_ Colonel  1194Rep 2,808Posts Drives: 2014 X5 3.5d 2025 X5 40i Join Date: Sep 2017 Location: SF Bay Area iTrader: (0) | Even before I got mine in 2017 few friends from Europe had BMWs with N57 and over 100K km on the clock, 0 issues. There are many threads here with diesel discussions, I don't think there are any "catastrophic design flaws" in N57. Majority of the issues are related to the emissions and "green" part of the N57 diesel such as EGR cooler leaking, EGR valve gets stuck, DEF system not happy etc. Just yesterday someone posted a new recall about HPFP but looks like pretty small amount of cars is affected. Overall in my opinion diesel is reliable enough to keep for a long time. You also can check these threads: https://f15.bimmerpost.com/forums/sh....php?t=1324994 https://f15.bimmerpost.com/forums/sh....php?t=1559265 https://f15.bimmerpost.com/forums/sh....php?t=1788151 |
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| 08-04-2021, 05:36 PM | #3 |
| AggieZig Private First Class 61Rep 106Posts Drives: 2010 E91 328xi Join Date: Sep 2017 Location: Los Angeles, CA iTrader: (0) Garage List2012 BMW E70 X5 35d [0.00]2010 BMW E91 328xi ... [0.00]1975 Porsche 914 2.0L [0.00] | Thanks for the help. Are fuel contamination issues common? Saw this thread... https://f15.bimmerpost.com/forums/sh....php?t=1266275 |
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| 08-04-2021, 05:49 PM | #4 |
atwal187 First Lieutenant    52Rep 347Posts Drives: bmw 335d e90 2009 Join Date: Dec 2013 Location: bc canada iTrader: (0) | N57 is dog poo compared to the m57. Cant nearly Make as much power m57 is true twin turbo whereas n57 is single VGT . M57 may have a few issues that you have to resolve early on but after that they are sturdy as a rock. N57 makes more efficiency because it has an 8 speed compared to m57 6 speed. Emissions wise they will both crap out neck and neck so don't rely on it to be bulletproof for emissions. They all have to be deleted regardless. N57 will need timing chains at around 150k miles ish. |
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| 08-05-2021, 08:43 AM | #5 |
| Wardman Lieutenant 133Rep 522Posts Drives: G05, 2025 40i Join Date: Sep 2011 Location: Philadelphia iTrader: (0) | Has been great for me for about 70,000 miles. The only major thing was the recent EGR replacement which is a know issue, and from what I've been told, an issue with any diesel. I'd say that stock it lacks some power from 50-80mph, but the Racechip helped with this in my trials. 100,000 miles is nothing for a diesel either, but I'd look hard at teh BMW warranty as you stated. Carbon build up is the major issue I have been watching - what caused the EGR recall and failure on mine. Google and you'll find lots, ask if it's been addressed on your X5, and then watch for it IMO. Was not a major issue once BMW admitted it was a failure (I did my own code reading for an ODB2 scanner (P0401 code) which was WAY easy once I tried it. i am not a mechanic by any means). |
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| 09-05-2021, 08:46 AM | #6 |
| m4forum Lieutenant 162Rep 552Posts Drives: M3 Join Date: Oct 2015 Location: Michigan iTrader: (6) | Diesel engines last forever just need to change oil and use good quality diesel as they running concept is simpler than gasoline engines. Those engines can last 400-500k miles w/o an issue .... most likely the car will give you more headache. enjoy it! I own a 200k diesel and just love it. |
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| 09-06-2021, 03:06 AM | #7 |
| Ascotgrun First Lieutenant 178Rep 310Posts Drives: X5 Join Date: Mar 2021 Location: Florida iTrader: (0) | Who do you know running a modern common rail, emissions equipped, diesel 400-500k miles without issue?. Which diesel do you drive that has not needed more than oil changes and good quality fuel in 200k miles?. |
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| 09-06-2021, 03:30 AM | #8 |
| atwal187 First Lieutenant 52Rep 347Posts Drives: bmw 335d e90 2009 Join Date: Dec 2013 Location: bc canada iTrader: (0) | No n57 is gonna last 400-500k miles that easily. People's cp4 pump blows up before 100k miles. And the DPF/ SCR/ EGR/ DEF system will crap out around those miles too. A fully deleted diesel with good oil change service intervals (5-10k) and regular preventative maintenance will help. But 400-500k will not come easily |
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| 09-06-2021, 08:07 AM | #9 |
XxBBVTMxX Lieutenant  337Rep 604Posts Drives: 2014 X5 35d, 2008 Lexus IS-F Join Date: Mar 2020 Location: Florida iTrader: (0) Garage List2014 BMW X5 Xdrive35d [0.00] | I love my N57. I cannot complain, it has been great to me. At Around 80-85k I had the stealership do all the fluids beyond the engine, except the transmission fluid & Filter (I did those myself). I just hit 100k on mine and did a full tune up on it.. (cleaned glow plugs ports and replaced them, replaced heating module, cleaned intake manifold, cleaned EGR Valve and lubed with 105, cleaned EGR Cooler, cleaned EGR Pipe, cleaned Throttle body, cleaned Intake Ports, cleaned all sensors in those areas, replaced all seals & reset adaptations). I have zero problems with my DPF nor my CP4. And, I do not let my tank go below 50%. BTW, there's a CP4 recall: (N57 35d (and others) Diesel HPFP Recall https://f15.bimmerpost.com/forums/sh....php?t=1847232 I also replenish the DEF with Platinum Everytime I do an oil change. Engine is running like new again. I do give it plenty of highway miles and I change my engine oil every 5k regardless of what BMW says (use FCP Euro). The only problem I had was a dirty injector (#4) but it was because I am sure the diesel I filled up with had poor quality. I changed my fill ups to Exxon and after four fill-ups, the issue was fixed. If you take care of your engine, it'll take care of you. I would make sure you get familiar with performing services (search the Forums & You Tube) so you can save money using FCP. |
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| 09-16-2021, 11:26 AM | #10 |
| HebTay New Member 0Rep 7Posts Drives: BMW X5 35d Join Date: Sep 2021 Location: VA iTrader: (0) | I'm in the middle of fuel injector issues that started at just under 90k mi, so I'm not real tickled with mine right now. There's a TSB on it for new owners (bought mine PO, so I'm out of luck) and mine doesn't seem to be under the HPFP recall either. I will say the FIs are very easy to reach and I did clean the 4 I haven't replaced yet. FIs are $300+ each (parts from FCP). But they are easy to get to as a DIY and there are good videos on You Tube for these issues. |
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| 09-16-2021, 11:33 AM | #11 |
crystalworks Captain  540Rep 654Posts Drives: Many BMW's Join Date: Jul 2017 Location: SA, TX iTrader: (0) | I had the dealership do 2 injectors to the tune of $850 shortly after we purchased ours back in Dec. 2020 w/ ~82k miles on it. Hoping the MY 2015 X5 gets added to the injector extended warranty so I can get reimbursed. Other than that... it's been good needing a battery (it was original) and some other minor cosmetic repairs. Maintenance includes trans fluid, Xfer case fluid & diff fluids coming soon, air filters (engine and cabin), and that's about it. All BMWs are going to need maintenance. Probably more when compared to other brands. I budget $2000/yr per BMW we own for repairs. Some years we spend $500 and some we spend $5000 between 6 Bimmers. Part of driving a vehicle that was designed with so much tech and trying to extract as much as possible out of a given displacement. Is what it is. Nothing drives as well as a well-maintained (or new) BMW. |
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| 09-16-2021, 12:50 PM | #12 |
| HebTay New Member 0Rep 7Posts Drives: BMW X5 35d Join Date: Sep 2021 Location: VA iTrader: (0) | Quote: Originally Posted by crystalworks  I had the dealership do 2 injectors to the tune of $850 shortly after we purchased ours back in Dec. 2020 w/ ~82k miles on it. Hoping the MY 2015 X5 gets added to the injector extended warranty so I can get reimbursed. | You got off cheap on the 2 injectors - my 2 were $2600 - leading me to watch a LOT of YouTube videos to avoid going back to the dealer for the other 4. Parts online look to be about $300 and change each, but I've physically disassembled and cleaned the remaining injectors, so I now know I can swap the 4 I need to in a couple of hours without issue. I am also looking at replacing the battery - that's $550 and has to be programmed to the car's computer, so I can't do that at home. So I'll pony up and pay the dealer to do that one. I am finding that planning to set aside a couple thousand per year (there will be peaks and valleys starting around 70k mi) is probably a best approach to planning for maintenance needs. It is a fun vehicle to drive, for certain. |
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| 09-16-2021, 01:00 PM | #13 |
| RED_Y_ Colonel 1194Rep 2,808Posts Drives: 2014 X5 3.5d 2025 X5 40i Join Date: Sep 2017 Location: SF Bay Area iTrader: (0) | Quote: | Originally Posted by HebTay You got off cheap on the 2 injectors - my 2 were $2600 - leading me to watch a LOT of YouTube videos to avoid going back to the dealer for the other 4. Parts online look to be about $300 and change each, but I've physically disassembled and cleaned the remaining injectors, so I now know I can swap the 4 I need to in a couple of hours without issue. I am also looking at replacing the battery - that's $550 and has to be programmed to the car's computer, so I can't do that at home. So I'll pony up and pay the dealer to do that one. I am finding that planning to set aside a couple thousand per year (there will be peaks and valleys starting around 70k mi) is probably a best approach to planning for maintenance needs. It is a fun vehicle to drive, for certain. | No need to pay dealer for the battery, you can get it for $200-250 and replace it using Carly, ISTA,Foxwell or other tool. |
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| 09-16-2021, 01:27 PM | #14 |
| HebTay New Member 0Rep 7Posts Drives: BMW X5 35d Join Date: Sep 2021 Location: VA iTrader: (0) | Quote: | Originally Posted by RED_Y_ No need to pay dealer for the battery, you can get it for $200-250 and replace it using Carly, ISTA,Foxwell or other tool. | Apparently, I need to look up more about this....  Seriously - I wish I'd found this forum a year ago. Learning a TON. |
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| 09-16-2021, 01:56 PM | #15 |
| RED_Y_ Colonel 1194Rep 2,808Posts Drives: 2014 X5 3.5d 2025 X5 40i Join Date: Sep 2017 Location: SF Bay Area iTrader: (0) | Quote: | Originally Posted by HebTay Apparently, I need to look up more about this.... Seriously - I wish I'd found this forum a year ago. Learning a TON. | Check these threads: https://f15.bimmerpost.com/forums/sh....php?t=1699570 https://f15.bimmerpost.com/forums/sh....php?t=1626793 https://f15.bimmerpost.com/forums/sh....php?t=1732762 |
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| 09-16-2021, 02:58 PM | #16 |
| crystalworks Captain 540Rep 654Posts Drives: Many BMW's Join Date: Jul 2017 Location: SA, TX iTrader: (0) | Quote: | Originally Posted by RED_Y_ No need to pay dealer for the battery, you can get it for $200-250 and replace it using Carly, ISTA,Foxwell or other tool. | ^What he said. I did my battery (only have the single 105AH AGM) myself. Cost was ~$185. I have a Foxwell here on hand. It's an absolute must if you own a modern BMW. The F15 requires the NT530 w/ BMW software. Costs ~$160. Pays for itself the first time you use it.  Quote: | Originally Posted by HebTay You got off cheap on the 2 injectors - my 2 were $2600... | Holy cow! $2600! They billed me incorrectly actually. It was supposed to be ~$1300 for 2 injectors but they quoted me wrong and honored it on vehicle pickup. |
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