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XBimmers | BMW X3 Forum BMW X3 and X4 Forums | F25 (2011 - 2017) | F26 (2014 - Current) First Generation BMW X4 (F26) General Forum Looking at purchasing an X4 M40i

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      01-17-2020, 07:36 AM   #1
Dem3ern
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Hello everyone,

I'm currently looking at purchasing an X4 M40i and just wanted to get an idea of what I should look out for... given they are rarer cars, not a ton of info out there.

It sounds like the N55 is pretty reliable. Is this also true for its 355hp form? What other things should I look out for?

Primarily looking at 2017s that are CPO and fully loaded (specifically want active cruise). Seems like most are listed in the high 30s. Most around 35k miles. Anyone buy one recently and can share what market value truly should be?

Appreciate any input! Thanks!
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      01-21-2020, 03:01 PM   #2
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Originally Posted by Dem3ern View Post
Hello everyone,

I'm currently looking at purchasing an X4 M40i and just wanted to get an idea of what I should look out for... given they are rarer cars, not a ton of info out there.

It sounds like the N55 is pretty reliable. Is this also true for its 355hp form? What other things should I look out for?

Primarily looking at 2017s that are CPO and fully loaded (specifically want active cruise). Seems like most are listed in the high 30s. Most around 35k miles. Anyone buy one recently and can share what market value truly should be?

Appreciate any input! Thanks!
The N55 has been around for a while and should be fairly reliable, as long as you maintain it well - regular service intervals, look for weird changes/noises, don't wait for a problem to get bad before fixing it, etc. I've got an N54 and an N20 and they've both been reliable, just a little higher maintenance than other cars.
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      01-23-2020, 06:26 PM   #3
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Picked up a '17 M40i executive car 2 years ago. Its still an N55 engine - just juiced up a bit. Awesome car for the CPO money. Our '16 X5 also has has N55. Plan to keep both for quite a long time.
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