Hi Beemers. I'm swapping out the stock air filer on my 2011 328i Cabrio to a K&N. Upon removing and disassembling the air box I noticed a secondary cloth-paper filter on the sensor side that seems permanent. Is this something that can be safely removed to increase airflow or should I just...

Brand new in box BMC FB351/01 Air Filter See the BMC web site full list of vehicles this fits. https://www.bmcairfilters.com/eng/car-filters/fb351-01/434/art If you have an E60/E61 naturally aspirated 5 series with an inline 6 (525i, 530i, 530xi) this should fit your vehicle. This is similar...

Driving around New York area today with Sport mode and noticing that HP gauge appears to be moving past 240 HP often just driving normal country road 50 miles north of NYC. Outside air is 20 F and yes this would help performance with O2. I usually see HP gauge at 160-180 HP around town roads...

Hey guys i need help finding an air intake for my e91, im pretty new to modding and need some direction. Can someone link me or show me where to find an air intake that fits in my car? Like the pipe that connects to the engine, has a spot for the mass air flow sensor, and any thing else i might...

I have 2014 F10 -- trying to understand the type of air filter and the what to do when outside air is really bad. These days with CA fires, we drive around quite a bit. Here are my questions: 1. What sort of air filter does F10 come with? Is it HEPA by any chance, if not; what are the specs? 2...

There are three "screws" that hold the cabin filter in place, as we know. Unfortunately, my car is missing one of the three "nuts" that they thread into. By nuts I mean the white square plastic pieces in the housing. I've seen the screw portion available for $10 on line, but not the nut part...

Hi, I've tried to find a way to fit a conical K&N cold air intake filter without the kit which is 300$+ but I didn't find an answer. So my two questions are: 1. Can i actually install the conical air intake to the stock air filter without the expensive kit ? 2. Installing the K&N air filter...

Hello Everyone! I have purchased an aftermarket air filter to fit to my 1999 E36 318is, however, am having some issues. From reading threads on this forum regarding air filter installations, I believe it has become evident that my car is not like others. When I say this, I am referring to the...

Hi, could use a little help from someone who has experience in these areas. I have a completely stock 328d X-drive Sport Wagon. Although I live in Stuttgart, Germany my car is US Spec. I just had it delivered locally after being built. I am looking into boosting performance. 1: a. So...

Recently noticed that she is herking and jerking going from first to second or back from send to first gear. I'm guessing it's the air filter. I park outside and with all this pollen this year, maybe that's it? My other guess is the fuel line needs to be flushed. I'd probably do both if it...

just swapped my bmw oem air filter for a K&N air filter for enhanced performance, and discovered an existing built-in, non-removable carbon air filter inside the housing unit. i debated cutting it out, but then wondered if it might affect the air flow sensor, or something else i hadn't...

My car seemed to be miss firing when I accelerated and had a hick-up when I would brake. I felt like maybe there was a transmission issue. I had it looked at by three different mechanics and they gave me three different answers, from transfer case, to coils, to bushings! Finally I found a...

I've always had an issue with the air-filters in my 07 750i. The drop in filter is always crushed and crimped by the upper filter--both sides. Getting the clips in place is a real chore and once they are on, I can see an "over bite" of the lip where the upper and lower part of the air box...

I just changed my air filter. As with the last time, I cannot get both clips to catch in the locking position when I close the holder. I've leaned into it while supporting the bottom of the intake box with no success. The filter I installed last time was a MANN filter. Yesterday I went to the...

To begin, now that I think about it, I'm not sure if my car met the qualifications for being "Certified." I sort of forget that conversation I had back in April of this year. What I can say is that I purchased a 2008 X3 from Otto's BMW f West Chester, PA with 79,000 miles on the clock. I would...

I just changed my airfilter as I did not feel good about the K&N filter that the previous owner had installed. I noticed that the duct connecting airfliter container to engine was not connected properly and it is loose :mad: ( As you may know it is a pain in ass to fit it and probably the shop...

Hey all! First off, new here, and wanted to say thanks! Thanks for all the hard work, and the information on this forum. Truly a wealth of information. I bought my new to me 123k mile 2007 328i a couple days ago, and I wanted to get a feel for what condition things were in, and what I would...

Can someone please help me out here?? I drive a 2009 528 xdrive with 63000miles on it. Its my first car and always been mainted at regular intervals. With oil changes done every 4000 miles. For the 60000 mile service I took it to an independent BMW shop to whom everyone in my family goes. I...

According to Wikipedia our X3 were built by Magnastyr in Austria. I searched high & low for a German Manufactured Air filter, the hengst-catalog seemed the best bet, but prices were awful high on the auction site. The catalog.mahle-aftermarket and catalog.mann-filter country of manufacture...

Hi, haven't posted for a while Here are my questions on 2007 650i E64. Recommendation regarding a new air filter, OEM part is 13 71 7 521 023 Is it worth while to buy a higher performance air filter in terms of gas milage and performance Any suggestions. Same question on cabin air filter OEM...