Premium Guard HEPA cabin air filter PC4255HX PUREFLOW — HEPA media with activated charcoal for BMW & Porsche fit

PUREFLOW PC4255HX is a high-efficiency HEPA cabin air filter with activated charcoal, engineered to improve in-car air quality for select BMW and Porsche models.

This Premium Guard PUREFLOW PC4255HX filter pairs HEPA-grade media with a charcoal layer to help trap very fine particles and reduce strong odors inside the vehicle cabin. Built to match original equipment fitment for a broad range of BMW sedans, coupes and xDrive variants as well as Porsche 911 and Boxster models, the PC4255HX is a direct-replacement option intended for routine cabin air maintenance.

How does this filter reduce in-cabin particles and odors?

The PUREFLOW PC4255HX uses dense HEPA-grade media to capture particles down to the submicron range while an active carbon layer adsorbs traffic and environmental smells. Together they lower particulate load and reduce noticeable odors without changing the factory cabin layout.

• HEPA-grade media captures very fine dust, pollen and airborne particulates.
• Activated charcoal adsorbs exhaust, smoke and strong outside odors.
• Engineered for tight seal and correct airflow path in compatible housings.

Will this filter fit my BMW or Porsche model?

PC4255HX is designed to fit many BMW models from model years around 2012–2019 and certain Porsche 911 and Boxster model years. Always confirm fitment with your vehicle’s filter lookup or compare the OEM part number before purchase; it replaces TYC 800195C as an aftermarket alternative.

• Compatible with a wide list of BMW 3/4 Series, M, 2 Series, 1 Series and select 5/6 variants.
• Fits Porsche 911 (various model years) and 718/Boxster/Cayman platforms where specified.
• Check Vehicle Filter Lookup or match dimensions/OEM references for confirmation.

Does the HEPA media affect airflow or climate system performance?

The denser HEPA-type media can introduce a slight increase in resistance compared with standard paper filters; however, the PC4255HX is designed to work within factory HVAC parameters. For most owners the impact is minimal and balanced by improved particle capture and odor control.

• Minor added restriction possible due to higher filtration efficiency.
• Designed to maintain proper fit and function in original filter housing.
• Recommended replacement intervals remain similar to OEM guidance depending on driving conditions.

How do I install and maintain the PUREFLOW cabin filter?

Installation follows the vehicle’s cabin filter access procedure—typically located behind the glove box or under the cowl. Replace with the same orientation shown in your vehicle manual, inspect the housing for debris, and consider seasonal swaps for best performance.

• Remove old filter, clean the housing, and insert PC4255HX with airflow arrow aligned.
• Inspect seals and tray for damage; replace if leakage or warping is found.
• Replace periodically based on driving environment—more often in dusty or urban areas.

Who is this for: The Premium Guard PUREFLOW PC4255HX is aimed at owners of compatible BMW and Porsche vehicles who want a higher level of particle and odor reduction than standard cabin filters offer. It’s a practical upgrade for commuters, allergy-conscious drivers, and anyone regularly exposed to urban traffic or seasonal airborne contaminants. Confirm vehicle compatibility with the Vehicle Filter Lookup or OEM reference before ordering to ensure a direct fit and proper HVAC operation.