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  1. #1
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    E53 4.4: M62 or N62 debate

    I know this topic has been brought up a few times but info is inconsistent and outdated. I need a tow vehicle for ~4,000lb boat/trailer and I am trying to decide between the M62 or N62 E53. I am open to a newer X5 but prefer the body of the E53 as appreciate having less electronics and crap to go wrong than later models. Researching the pros and cons this is what I believe is generally agreed:

    M62: more reliable but less power and stuck with pre-facelift models. Get the 2003 if going M62
    N62: more power and better fuel economy but less reliable mainly due to more complex management and worse coolant system design. Tranny is worse than M62's. Most common expense (if lucky) is intermediate levers. Get the 2006 if going N62

    Is this accurate? I would rather give up a little power for more reliability but I'm sure there is more to it. What else am I missing? What preventative maintenance should I make sure has been recently done or need to do myself if buying either one? Is a '09 35d the real answer to my question?
    Last edited by fronton; 04-24-2014 at 11:59 AM.

  2. #2
    Join Date
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    Get the best of either that you find. I would recommend not getting caught up in this game because you could find great or horrible examples with either of the engines.

    The N62 boogie man seems to be the intermediate levers...but the M62TU has its boogie man, too...the timing chain guides. Both of these issues get discussed a lot...and any used vehicle is going to have its issues. Just try to select one that appears to be in good shape...and spend the money on a PPI (pre-purchase inspection) when you think you've found "the one". That will be the best $100 -$200 you could spend...even if it means walking away from the deal if the PPI finds way more issues than what you want to deal with...$200 now...or $2000 later.

    We could sit here and go back and forth with the failings of each engine or model...but again, try not to get caught up...and remain level headed in your search. Be prepared to walk away when your head is saying "no"...but your gut is saying "yes". If the PPI shows a huge list...don't let that scare you either. Look at it and determine what needs to be done right away, what can be put off for later, what can you do your self (DIY), and what would you have to pay to have done.

    It's all a crap shoot...used vehicles are what they are...be prepared to maintain/repair what's worn out...or is going to wear out. And know that we're here to help you through.
    (if my grammar, spelling, or sentence structure is screwed up....don't blame me...it's my dang bluetooth keyboard...I try to catch & correct the mistakes...but I may not catch all of them.)

    Q {BMW CCA Member #191509}
    2013 650ix GC (Black Sapphire) 1/13 mfg date <<~>> 2006 X5 4.4i (Sterling Gray) 12/05 mfg date

    (Past BMWs)
    1997 740iL (Arctic Silver) <<~>> 1999 540iT (Orient Blue) <<~>> 1995 525iT (Alpine White) 1991 735iL (Schwarz) <<~>> 1985 325e (Bronzit)

  3. #3
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    ^ thank you very much, I appreciate the advice. Is it better to try any find one with less than 80k miles before any major repairs or between 100-110k after most of the initial repairs have been done and have solid service records?

  4. #4
    Join Date
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    A service history (if the owner has it) would be a better barometer...a well maintained X with an owner that stayed on top of maintenance, and took extremely good care of the vehicle, but has higher mileage, may be a better buy than an X with less miles but an owner that rode her hard & put her away wet...and actually neglected it until it was time to sell...then had the X detailed and the latest issue fixed but now wants to dump & walk before the repair/maintenance list starts growing.

    At this point, mileage is not the only thing that takes its toll...so does age...and a 2004 with less than 80k miles still has 10 years of aging parts. What's the difference between an 80 yr old virgin & an 80 yr old whore...they both are 80 yrs old.
    (if my grammar, spelling, or sentence structure is screwed up....don't blame me...it's my dang bluetooth keyboard...I try to catch & correct the mistakes...but I may not catch all of them.)

    Q {BMW CCA Member #191509}
    2013 650ix GC (Black Sapphire) 1/13 mfg date <<~>> 2006 X5 4.4i (Sterling Gray) 12/05 mfg date

    (Past BMWs)
    1997 740iL (Arctic Silver) <<~>> 1999 540iT (Orient Blue) <<~>> 1995 525iT (Alpine White) 1991 735iL (Schwarz) <<~>> 1985 325e (Bronzit)

  5. #5
    Join Date
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    State College, PA
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    2009 BMW 135i
    Quote Originally Posted by Qsilver7 View Post
    A service history (if the owner has it) would be a better barometer...a well maintained X with an owner that stayed on top of maintenance, and took extremely good care of the vehicle, but has higher mileage, may be a better buy than an X with less miles but an owner that rode her hard & put her away wet...and actually neglected it until it was time to sell...then had the X detailed and the latest issue fixed but now wants to dump & walk before the repair/maintenance list starts growing.

    At this point, mileage is not the only thing that takes its toll...so does age...and a 2004 with less than 80k miles still has 10 years of aging parts. What's the difference between an 80 yr old virgin & an 80 yr old whore...they both are 80 yrs old.
    Lol! Love that. The answer is std count.

  6. #6
    Join Date
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    Quote Originally Posted by MuNkY6913 View Post
    Lol! Love that. The answer is std count.
    Thanks...I laughed, too...I didn't even remember writing that last line.
    (if my grammar, spelling, or sentence structure is screwed up....don't blame me...it's my dang bluetooth keyboard...I try to catch & correct the mistakes...but I may not catch all of them.)

    Q {BMW CCA Member #191509}
    2013 650ix GC (Black Sapphire) 1/13 mfg date <<~>> 2006 X5 4.4i (Sterling Gray) 12/05 mfg date

    (Past BMWs)
    1997 740iL (Arctic Silver) <<~>> 1999 540iT (Orient Blue) <<~>> 1995 525iT (Alpine White) 1991 735iL (Schwarz) <<~>> 1985 325e (Bronzit)

  7. #7
    Join Date
    Dec 2013
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    E53/E46
    Sorry for reviving this old thread. I need some input if I could swap the M62 to N62 engine. Right now, I have 2003 with bad M62 engine and I found a N62. I appreciate all information I can get. Thank you.

  8. #8
    Join Date
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    Quote Originally Posted by Alika808 View Post
    Sorry for reviving this old thread. I need some input if I could swap the M62 to N62 engine. Right now, I have 2003 with bad M62 engine and I found a N62. I appreciate all information I can get. Thank you.
    How much money do you have to put into a project like that? You're talking about putting a new generation double VANOS engine (the N62) into an e53 with the old generation single VANOS M62TU engine. You also have other technological differences like the AWD system & no auxiliary fan (in front of the radiator).

    Again, anything can be done with enough money and know-how...but if you're looking for a simple plug-n-play...I'd recommend looking into engine bay dimensions, and front end suspension set-up between the two set-ups to see how much has to be changed or done to make it all fit & work.


    {N62}


    {M62TU}
    Last edited by Qsilver7; 02-03-2018 at 11:33 PM.
    (if my grammar, spelling, or sentence structure is screwed up....don't blame me...it's my dang bluetooth keyboard...I try to catch & correct the mistakes...but I may not catch all of them.)

    Q {BMW CCA Member #191509}
    2013 650ix GC (Black Sapphire) 1/13 mfg date <<~>> 2006 X5 4.4i (Sterling Gray) 12/05 mfg date

    (Past BMWs)
    1997 740iL (Arctic Silver) <<~>> 1999 540iT (Orient Blue) <<~>> 1995 525iT (Alpine White) 1991 735iL (Schwarz) <<~>> 1985 325e (Bronzit)

  9. #9
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    I would go with the old style v-8

  10. #10
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    Just find a used M62 for $1500 or less, swap it in and be done with it. If you want more HP then sell your X after the swap and buy a 4.8is or X5M. I don't care who you buy it from make sure it's clean and has been maintained. Don't pay that much for a grease trap unless the seller will warranty it. I would replace timing change guides and all seals and gaskets so prepare to drop another $1000 on those.
    85 635CSi (the Bomber), 87 DINAN /// M6 (SOLD)

  11. #11
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    Sorry to revive an old thread. Does the transmission mate? I mean, if one comes across a N62 transmission, will.it bolt behind a M62TU ?

    Enviado desde mi SM-N920G mediante Tapatalk
    Some cars just resist going to the grave.

  12. #12
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    Different torque converters
    National Capital Chapter #465420 ///M Registry


    2002///M3 | Steel Gray Metallic | Imola Red | 6MT | Convertible
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    2006 ///M3 | Silver Gray | Black | Competition Package (ZCP) | 6MT | SOLD
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  13. #13
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    Quote Originally Posted by jdauria View Post
    Different torque converters
    I was thinking manual from a N62 behind a M62

    Enviado desde mi SM-N920G mediante Tapatalk
    Some cars just resist going to the grave.

  14. #14
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    N62 did not have manual transmissions which can be combined with transfer case, RWD only.

    Same as M62 BTW

  15. #15
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    Quote Originally Posted by MikeEdmonton View Post
    N62 did not have manual transmissions which can be combined with transfer case, RWD only.

    Same as M62 BTW
    It did in E60's. I know this is not the correct subforum but's the only one in which I found N-M62 compare questions regarding interchange of parts in the drivetrain

    Enviado desde mi SM-N920G mediante Tapatalk
    Some cars just resist going to the grave.

  16. #16
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    Quote Originally Posted by jicaino View Post
    It did in E60's.
    E60 with n62 were rear wheel drive only. You can not use it with the transfer case. The back of the tranny is different in AWD vehicles.

  17. #17
    Join Date
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    Quote Originally Posted by MikeEdmonton View Post
    E60 with n62 were rear wheel drive only. You can not use it with the transfer case. The back of the tranny is different in AWD vehicles.
    Thanks Mike. It's for a 540i. So rwd-rwd cars, M62 auto hypothetical conversion to manual using N62 transmission. Reason why: I hate getrag

    Enviado desde mi SM-N920G mediante Tapatalk
    Some cars just resist going to the grave.

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