MAHLE LAK 812 Cabin Air Filter

The LAK 812 is designed for BMW F-platform models: 1-Series F20/F21 (2011–2019), 2-Series F22/F23 (2013–2019), 3-Series F30/F31/F34 (2012–2019), 4-Series F32/F33/F36 (2014–2019), M3 F80 (2015–2018), and M4 F82/F83 (2015–2020). Community reviewers have confirmed fit across multiple F30 and F32/F36 variants. Always verify the fitment lookup against your specific year, model, and trim before purchasing.

MAHLE is a direct OEM supplier to BMW — the LAK 812 is built by MAHLE to BMW OEM specification and cross-references to BMW OEM part number 64119237555. Multiple community reviewers describe it as identical to or better than the OEM filter they removed. The seal construction in particular has been noted as superior to the OEM felt-end-seal design, which can fold or buckle during installation.

Yes. The LAK designation in MAHLE's part numbering system stands for Luftfilter Aktivkohle (Activated Carbon Filter). Product imagery confirms the dark pleated activated carbon media face. The activated carbon layer captures exhaust fumes, bacterial aerosols, and odors in addition to standard particulate filtration. Community reviewers confirm odor improvement after installation ('freshened the smell of my AC').

The directional arrow on the filter should point toward the engine (toward the firewall), per community Q&A on the Amazon listing. MAHLE includes a BMW installation guide (black-and-white photos) in the box covering the F30 chassis, though reviewers note the guide's airbag-screw diagram can be misleading — the correct approach is to loosen the 10mm nuts on the dashboard panel rather than removing Torx screws from airbag components. A T20 Torx bit is needed for the filter retainer after the panel is removed.

No independent test standard (ASHRAE 52.2 MERV rating, ISO 16890 ePM rating, or EN 1822 HEPA classification) has been published for the LAK 812 specifically. The efficiency claim is OEM-equivalent — built to the specification BMW requires for the vehicle's HVAC system. MAHLE has published ISO 16890 certifications for other filter lines globally, but none is publicly available for this part number.