K&N performace air filter which came out of our 2015 Ford Focus 1.0 ecoboost. The car has since been sold. Ahead of the car sale, I reinstalled its original air filter.

This filter was in the car for 1yr/8,000 miles, and was cleaned once. No major damage, good working order.

please note: I am only certain that this will fit into a mk3 focus (2012-2018) with the 1 litre, 3 cylinder ecoboost engine. If you have a mk3 focus with a different engine and wish to know whether it fits, you'll need to conduct your own research to determine that.