Original MANN-FILTER Interior Filter CU 1721-2 – Cabin air filter set

MANN‑FILTER CU 1721-2 Cabin Air Filter Set

The MANN‑FILTER CU 1721-2 is a premium cabin air filter designed to provide clean, healthy airflow inside passenger vehicles. This set includes two filters that replace the original OEM units in a wide range of BMW and ALPINA models, ensuring optimal performance and longevity.

Key Features

• High‑Efficiency Filtration: Captures dust, pollen, and fine particulates with an advanced multi‑layer media system.
• OEM Quality: Meets or exceeds the original equipment specifications for BMW and ALPINA vehicles such as X3 (F25), X4 (F26), XD3 (F25), and other models.
• Easy Installation: Fits directly into the glove compartment area behind the console, requiring no special tools or modifications.
• Durable Construction: Made from high‑grade materials that resist moisture and temperature variations, extending filter life.
• Standard Dimensions: Height 30 mm, Length 164 mm, Width 90 mm – the exact size needed for a seamless fit.

Compatibility Overview

The CU 1721-2 filter set is engineered for a broad spectrum of passenger cars. It is specifically tailored to:

• BMW X3 (F25) – 2010‑2017 models
• BMW X4 (F26) – 2010‑2017 models
• BMW XD3 (F25) – 2010‑2017 models
• ALPINA variants of the above vehicles
• Other compatible BMW and ALPINA models that use the same filter housing dimensions.

Installation Guide

1. Locate the glove compartment area behind the console where the original cabin air filter resides.
2. Remove the old filter by sliding it out of its slot; discard or recycle responsibly.
3. Insert the new CU 1721-2 filter set, ensuring that the airflow direction arrow points towards the vehicle’s interior.
4. Secure the filter in place and close the glove compartment.

After installation, the cabin air system will automatically draw fresh, filtered air into the passenger compartment, improving comfort and reducing allergens.

Performance Benefits

• Improved Air Quality: Reduces airborne contaminants by up to 99%, creating a healthier environment for occupants.
• Enhanced HVAC Efficiency: Cleaner airflow allows the heating, ventilation, and air‑conditioning system to operate more efficiently.
• Reduced Maintenance: A high‑quality filter resists clogging, lowering the frequency of replacements compared to lower‑grade filters.

Maintenance Tips

For optimal performance, replace the CU 1721-2 cabin air filter set every 12,000–15,000 miles or annually, whichever comes first. In dusty or high‑pollution environments, consider a shorter interval.

Why Choose MANN‑FILTER?

MANN‑FILTER is renowned for its commitment to quality and innovation in automotive filtration solutions. The CU 1721-2 set reflects this heritage through:

• Rigorous testing against OEM standards.
• Use of advanced filter media that balances airflow resistance with particulate capture.
• A reputation for reliability across a wide range of vehicle models.

Conclusion

The MANN‑FILTER CU 1721-2 Cabin Air Filter Set delivers superior filtration performance, OEM compatibility, and ease of installation. By choosing this filter, vehicle owners can ensure that the cabin environment remains clean, comfortable, and free from harmful particles for years to come.