Febreze HEPA Cabin Air Filter for Audi — Unscented PUREFLOW with Charcoal & Baking Soda

Febreze Odor Control UNSCENTED HEPA Cabin Air Filter by PUREFLOW RZ18162H is a fragrance-free, HEPA-grade replacement filter that captures fine dust, pollen and odor-causing particles to help keep your Audi cabin air cleaner without adding scent.

Designed for a wide range of Audi models, this cabin air filter combines HEPA-level filtration with activated charcoal and baking soda to address microscopic particulates and neutralize odors at the source. PUREFLOW multi-layer media balances high-efficiency particle capture with low pressure drop so the HVAC system maintains steady airflow. The result is fresher, clearer cabin air without masking smells with fragrances—useful for drivers who prefer unscented ventilation or who have sensitivities to added fragrances.

How does this filter reduce smells inside my car?

The Febreze Odor Control filter traps odor-causing particles and adsorbs volatile compounds using a dedicated charcoal and baking soda layer. Instead of only covering up smells, the media works to neutralize them, removing many sources of lingering odors like exhaust, smoke and food particles.

• Activated charcoal layer adsorbs gases and VOCs.
• Baking soda component helps neutralize acidic and basic odor molecules.
• Unscented finish avoids introducing new fragrances.

Will this filter actually capture fine dust and pollen?

Yes—this product is built to HEPA-level specifications and captures a high percentage of sub-micron particles that contribute to poor cabin air quality. PUREFLOW’s four-layer media targets dust, pollen, mold spores and similar airborne contaminants while keeping airflow efficient.

• HEPA-grade layer captures down to sub-micron particles.
• Multi-layer construction preserves HVAC performance with low pressure drop.
• Helps reduce airborne irritants that settle in vents and ducts.

Is installation difficult and which vehicles does it fit?

Installation is straightforward and typically completed in under 10 minutes for most vehicles. The box includes a QR code linking to vehicle-specific step-by-step videos to guide the swap. This Febreze PUREFLOW filter is made to replace several Audi OEM part numbers and fits many Audi A, S, Q and RS models listed on the product page.

• Quick swap—most installs under 10 minutes.
• QR code directs to model-specific installation videos.
• Replaces common Audi OEM numbers like 4M0 819 439 A/B/C and 8W0 819 439 A.

How often should I replace the cabin air filter for best results?

Replacement frequency depends on driving conditions and environment; typical guidance is every 12,000–18,000 miles or once a year. If you drive in heavy traffic, dusty roads, or areas with poor air quality, check and replace more frequently to maintain filtration performance and odor control.

• Standard recommendation: ~12,000–18,000 miles or annually.
• Replace sooner after heavy urban, construction, or dusty travel.
• Visual inspection can reveal clogging or discoloration prompting earlier change.

Who is this for? This Febreze Odor Control UNSCENTED HEPA Cabin Air Filter suits Audi owners who want high-efficiency particle capture plus neutralization of smells without added fragrance. It’s ideal for drivers with allergies or sensitivities, those who transport pets or food, and anyone seeking improved HVAC performance and fresher cabin air while maintaining the original vehicle fitment and airflow characteristics.