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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > K&N for 335d



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      05-14-2011, 12:40 AM   #1
f00dstamps
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K&N for 335d

Has anyone tried the K&N drop-in filter for the 335d? It appears to be the only modification available to the intake system.
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      07-13-2011, 11:33 PM   #2
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air filter

Has anyone tried K&N, I have been eyeing it out, any experiences?
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      07-16-2011, 07:58 AM   #3
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I would also like to know
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      07-16-2011, 10:07 AM   #4
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Quote:
Originally Posted by rvladescu View Post
I would also like to know
Will try it next week and tell u all
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      07-16-2011, 10:18 AM   #5
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I would never use K&N in a daily driver.
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      07-16-2011, 12:56 PM   #6
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Quote:
Originally Posted by Socom View Post
I would never use K&N in a daily driver.
Just out of curiosity, why do you say so? I'm considering the Euro AirBox for my NA engine, and I would jump to replace the BMW paper cone filter with the K&N cone filter. What's your beef with them? I don't mean that in an insulting way, I just want to understand why you don't like them.
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      07-16-2011, 02:42 PM   #7
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[QUOTE=rollinstone157;10036959][QUOTE=Socom;10036384]I would never use K
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      07-16-2011, 08:57 PM   #8
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Quote:
Originally Posted by rollinstone157 View Post
Just out of curiosity, why do you say so? I'm considering the Euro AirBox for my NA engine, and I would jump to replace the BMW paper cone filter with the K&N cone filter. What's your beef with them? I don't mean that in an insulting way, I just want to understand why you don't like them.
No reason to let more dirt in engine for a different sound. Hp gains are negligible
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      07-17-2011, 09:34 AM   #9
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i agree. Oiled filters like K&N have caused gummed up MAF's and stuck idle air control valves on my older cars. Its not K&N only, but Injen and other oil-based filters. i've switched to dry flow filters like AEM. They seem thicker and filter better. Gauze-type seems too porous.
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      07-22-2011, 03:31 PM   #10
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Quote:
Originally Posted by ChiDiddy View Post
i agree. Oiled filters like K&N have caused gummed up MAF's and stuck idle air control valves on my older cars. Its not K&N only, but Injen and other oil-based filters. i've switched to dry flow filters like AEM. They seem thicker and filter better. Gauze-type seems too porous.
While i'm sure it lets in more dirt than a conventional paper filter does i really dont think it is going to make that much of a difference in your car unless you are driving in a dusty climate all day every day. I have been using some sort of K&N filter in all my cars/motorcycles since 1992 and have never faced any issues. Granted i change my oil frequently (every 2500 miles using synthetics)on my other cars, once every 6 months on my motorcycle and atv and on my E90 i change it once a year (mine is a 2006 with 19,000 miles) ii also inspect the K&N filters every service and will either clean or replace it if it looks less than serviceable.
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      08-13-2011, 04:00 PM   #11
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K&N million Mile Warranty, filter outlasts your engine!

Seems to be common that people get MAS errors on BMW and other cars from K&N oil as I read in forum for our pilot. Here in Arizona lots of dust, so I'll keep OEM. FYI: I removed the K&N in my Honda after reading all the posts about K&N not cleaning air as well as paper OEM filters.

Explains why K&N gives million mile warranty on the filter. They know your engine wont last that long with a K&N in it.
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      08-13-2011, 07:32 PM   #12
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How About BMC are they better then kn cause that what i have

thanks
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      08-15-2011, 01:40 PM   #13
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Quote:
Originally Posted by nhinnhuckyduc View Post
How About BMC are they better then kn cause that what i have

thanks
Honestly as a daily driver I've seen zero evidence where anything other than OEM was best.
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      08-15-2011, 07:39 PM   #14
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I've had a K&N in my car for about 30k miles...no issues with it whatsoever, but no real differences, either.
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      09-04-2011, 07:31 AM   #15
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I've had a K&N in my 4-Runner for over 120K miles - No issues other than saving $ by not buying the replacement paper filters.

Running a BMC in the M3. Again, no issues.

Looking at eventually getting one for the 335d.

Any vehicle I plan to keep will have one.
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      09-05-2011, 08:41 AM   #16
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Quote:
Originally Posted by Socom View Post
Honestly as a daily driver I've seen zero evidence where anything other than OEM was best.
This.

If there were anything to be gained by installing something as easy as a filter, cone or otherwise, one would think the car manufacturers would install them. They might make a car sound a little better but that's all that will be gained and at the sacrafice of allowing more dirt into the engine.
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      09-09-2011, 02:23 PM   #17
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Quote:
Originally Posted by cssnms View Post
This.

If there were anything to be gained by installing something as easy as a filter, cone or otherwise, one would think the car manufacturers would install them. They might make a car sound a little better but that's all that will be gained and at the sacrafice of allowing more dirt into the engine.
What incentive would an automobile manufacturer have to provide a reusable filter instead of selling replacement filters to you for the life of the car?
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      09-09-2011, 08:44 PM   #18
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Filter test

http://home.roadrunner.com/~jbplock/ISO5011/SPICER.htm

But hey if an air filter makes you feel better have at it.
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      09-10-2011, 12:29 PM   #19
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Quote:
Originally Posted by Moxie View Post
What incentive would an automobile manufacturer have to provide a reusable filter instead of selling replacement filters to you for the life of the car?
Id rather spend $25 every couple of years on a OEM airfilter instead of scoffed cylinder walls from 1950 air filtrations tech.
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      05-24-2014, 02:02 PM   #20
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OEM only OEM only OEM only, it will mess up your life, not really but can fool your MAF and then you have problems...I know I tried one on my VW TDI...
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      05-24-2014, 02:12 PM   #21
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Quote:
Originally Posted by DieselRacer View Post
OEM only OEM only OEM only, it will mess up your life, not really but can fool your MAF and then you have problems...I know I tried one on my VW TDI...
Holy thread revival batman but since this is back where can i find the filters for 25$ haha theyre expensive now.
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      05-24-2014, 02:16 PM   #22
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Originally Posted by Nushibo View Post
Holy thread revival batman but since this is back where can i find the filters for 25$ haha theyre expensive now.
Im old skool that way...
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