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      10-12-2019, 08:38 PM   #1
sinbad4
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2020 has different sized air filter!

I wrecked my X3 last spring. Finally picked up new 2020 X3 M40i. I had salvaged my K&N Air Filter from totaled car (only used 3 months). I went to install K&N and found it didn't fit! It's slightly too large - both longer, wider and deeper!

I still have factory filter from 2019 X3 M40i.

Enclosing some pics comparing 2019 vs 2020 vs K&N. I will be looking for a solution. I have used K&N for years. I prefer the oil soaked cloth to the dry paper. I also prefer the drop in filters as they retain the cold air intake system.

Anyone have certain knowledge on a K&N air filter that fits?
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Last edited by sinbad4; 10-12-2019 at 08:48 PM..
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      Yesterday, 08:44 AM   #2
j1980mac
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You'll likely be looking at around at least 6-9 months from now.

I got my 2018 X3 M40i in May of 18, but couldn't get the K&N until late in the same year.
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      Yesterday, 08:52 AM   #3
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Ah crap. Thanks for pointing that out. I was just about to start shopping for one.
Would the Supra replacement filter work?
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      Yesterday, 08:57 AM   #4
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Seem like its a possibility I think.

https://www.knfilters.com/air-filter...ent-air-filter
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      Yesterday, 03:52 PM   #5
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Quote:
Originally Posted by suby01 View Post
Seem like its a possibility I think.

https://www.knfilters.com/air-filter...ent-air-filter
Don't think so.. has same dimensions as K&N for 2018/19 X3 M40i. Comparing your link to link for 2018/19 BMW X3 M40i K&N
https://www.knfilters.com/air-filter...ent-air-filter

From your link:
  • Height 1.625 in (41 mm)
  • Outside Length 10.688 in (271 mm)
  • Outside Width 9.156 in (233 mm)

From link to 2018/19 X3 M40i
  • Height 1.125 in (29 mm)
  • Outside Length 10.688 in (271 mm)
  • Outside Width 8.625 in (219 mm)
You can see, from your link is actually wider than 2018/19 X3 M40i... so definitely will not work.

I think j1980mac is correct, we'll be stuck waiting some months.
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      Yesterday, 07:38 PM   #6
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really don't know what's the point of change the size of filter just a bit like this. wouldn't it easier for everyone that all G01 use same filter??
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      Yesterday, 08:51 PM   #7
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Quote:
Originally Posted by lo_cheng View Post
really don't know what's the point of change the size of filter just a bit like this. wouldn't it easier for everyone that all G01 use same filter??
Well the car is a G01 but the 2020 have a completely new engine so it only makes sense that the engine components may be different.
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      Today, 02:12 AM   #8
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Quote:
Originally Posted by suby01 View Post
Well the car is a G01 but the 2020 have a completely new engine so it only makes sense that the engine components may be different.
No, it's a technical update of the same engine.
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      Today, 12:55 PM   #9
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Quote:
Originally Posted by suby01 View Post
Quote:
Originally Posted by lo_cheng View Post
really don't know what's the point of change the size of filter just a bit like this. wouldn't it easier for everyone that all G01 use same filter??
Well the car is a G01 but the 2020 have a completely new engine so it only makes sense that the engine components may be different.
but for that small differ, any differ in airflow or space use?? if not, why change it just for a bit
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      Today, 01:58 PM   #10
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^^ point is that the air filter is different. Thanks OP for sharing this. Im just now sitting and waiting on companies that will actually produce something for our cars.
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      Today, 06:27 PM   #11
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I don't mean to start a war here, but is there any scientific evidence that a non-OEM filter actually makes a difference for the M40i? I have heard a lot of general claims (including manufacturer claims), but have not seen any compelling evidence that the filter makes a difference on the M40i. I would be very much interested to learn because if it makes a difference, I'd change the filter on mine.
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