Compatibility: This replacement engine air filter is compatible with Civic 2.0L Naturally Aspirated L4 only (2016-21), does not fit Type R with 2.0L L4 Turbocharged. Please check the compatibility before your purchase to ensure this is the correct engine air filter for your vehicle. Replacement Part Number: The reference replacement part number for this air filter is MT-051, CA12051, 17220-5BA-A00 High Quality: The engine air filter is constructed with special material filter paper and strong ABS plastic frame. 2 times longer service life than normal air filters. Mileage up to 20,000 km for fewer replacements Good Protection: The high-quality filter paper has good fold stability and can also hold a large amount of dust, which will maintain good filtration performance after long-term use. Easy Installation: The air filter is designed and manufactured with OE size. It can be installed directly and no further modification is required.