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New MANN-FILTER cabin air filter featuring nanofibers

Filter out the finest particles and ensure clean air inside the vehicle cabin with the MANN-FILTER FreciousPlus cabin air filter featuring nanofibers. Resistant to humidity and temperature fluctuations throughout the entire maintenance interval.

Ludwigsburg, June 27, 2024. In recent years, international studies have proven the impact of the smallest particles on our health: The smaller the particles, the more dangerous they are, as they can penetrate deeper into the human respiratory system and cause serious health problems, including death. With the evolved FreciousPlus featuring nanofibers, MANN-FILTER sets new standards in cabin air filtration. The new filter not only impresses with its filtration of ultra-fine particles, but also with the filtration of pollutants both from outside and inside the vehicle. The new filter continues to offer proven protection against allergens, bacteria, and mold.

MANN-FILTER FreciousPlus featuring nanofibers

Global filtration expert MANN+HUMMEL has been successfully using nanofiber technology to filter out the finest particles for a number of years. This technology is now also available on the automotive aftermarket for premium brand MANN-FILTER cabin air filters. Since January 2024, these have been available in the form of the MANN-FILTER FreciousPlus FP 38 004 for the BMW 5 Series and 7 Series saloons, and now feature in the 5 Series Touring wagon, too.

Innovative nanofiber technology in the FreciousPlus cabin air filter

“Our MANN-FILTER FreciousPlus FP 38 004 has the finest nanofibers, which are about 100 times thinner than the fibers of conventional filter linings,” says Thomas Heininger, Director Engineering Cabin Air Filters at MANN+HUMMEL. "These fibers form a spider's web-like structure over the other filtration layers with coarser fibers, enabling them to capture ultra-fine particles. This means that, in addition to the PM10 and PM2.5 particles, the FreciousPlus featuring nanofibers can remove 90 percent of the even finer PM1 class i.e. particulates with an aerodynamic diameter of less than 1 micrometer (0.0001 cm). The nanofibers in the FreciousPlus filter up to 80 percent of ultra-fine particles (UFP) smaller than 0.1 micrometers, thus achieving maximum values. For context, these extremely small particles are about 700 times smaller than a human hair", Heininger explains. 

Nanofiber size comparison

Comprehensive range of services throughout the entire maintenance interval

The extremely thin nanofiber ensures that the FP 38 004 is resistant to humidity and temperature fluctuations and provides consistently high filtration throughout the entire service interval.

Regular replacement is important

To ensure that the FreciousPlus cabin air filter with nanofibers can work reliably, it must be replaced once a year or every 15,000 kilometers. "We recommend that local experts regularly inform vehicle owners of the importance and benefits of the cabin air filter. Most car drivers are unfortunately unaware of this," says Heininger.

In Germany, MANN+HUMMEL has been granted a patent for the nanofiber technology, which protects certain aspects of the filter media and the underlying production process. In addition, a patent application has already been filed for this technology in other countries.

Contact persons

Kersten Solacroup

Kersten Solacroup

Brand Management MANN-FILTER

Sophie-Charlotte Barlut

Strategic Communications


MANN+HUMMEL is a global leader in filtration technology. Within its two business units Transportation and Life Sciences & Environment, the Ludwigsburg-based Group (Germany) develops intelligent filtration and separation solutions that enable cleaner mobility, cleaner air, cleaner water, and cleaner industry. Thus, the family-owned company founded in 1941 is making an important contribution to a clean planet and the sustainable use of limited resources. In 2023, over 22,000 employees at more than 80 locations generated a turnover of EUR 4.7 billion.

You can find further information on MANN+HUMMEL at https://www.mann-hummel.com