This high-quality 4U (33518BW) brand active carbon cabin (pollens) filter is designed for the ventilation and air conditioning (A/C) system of BMW X5 Series F15 (2013-2018) and X6 Series (F16) vehicles. It filters out dirty air from the outside, allowing only clean and odorless air to enter your vehicle. Thanks to the concentrated active carbon particles inside, it absorbs exhaust fumes, harmful gases, and unpleasant odors that standard filters cannot stop.
- Active Carbon Layer: Neutralizes toxic gases from truck/bus exhausts and heavy odors from outside before they enter the cabin.
- Superior Allergen Protection: Filters out microscopic pollen, soot particles, and dust mites with a 99% efficiency, providing safe driving for asthma and allergy sufferers.
- Optimum A/C Performance: Its porous structure does not obstruct the airflow (blowing intensity) of your air conditioning, enhancing its heating/cooling efficiency.
- Original Size: Fits perfectly into the pollen filter housing of the F15 X5, preventing air (dust) leaks from the edges.
Technical Details
| Brand |
4U (Imported / Equivalent) |
| Product Code |
33518BW |
| Possible OEM References |
64 11 9 248 808 / 64 11 9 272 632 |
| Filter Type |
Active Carbon (Charcoal) |
| Installation Location |
Inside Cabin (Under Dashboard Ventilation Unit) |
Frequently Asked Questions (FAQ)
Should I get a plain white filter or a carbon one? Definitely a carbon one. White paper filters only trap physical dust, but they allow exhaust odors from traffic to enter the vehicle directly. Active carbon filters with a dark gray (charcoal) coating absorb odors and toxic gas molecules, keeping cabin air at luxury vehicle standards. The small price difference is absolutely worth it.
I smell a bad odor when I turn on the A/C, will changing the filter help? Mostly yes. The number one cause of bad odors is a pollen filter that has reached the end of its life and has bacteria/mold growing on it due to moisture. When you replace the filter with this new product, the odor will be eliminated. However, if the odor has penetrated the A/C ducts, using "A/C Bomb (Disinfectant)" during the filter change will provide a complete and definitive solution.
How often should I change the pollen filter? To ensure healthy cabin air and prevent strain on the A/C, it should be replaced at every periodic maintenance (every 10,000 - 15,000 km). It should be noted that the filter can clog early due to pollen in the spring and heavy dust in the summer. A dirty filter can strain the A/C fan motor, leading to malfunctions.
