Honda HRV 2004, K&N Air Filter Removal, Clean & Install.
I have a K&N Air Filter in my Honda HRV, it's a reusable filter that can be cleaned and reused, saving you money in the long run. K&N recommend cleaning the K&N air filter every 50,000 miles, but I'll just clean mine every year instead. obviously the removal and install procedure is the same for an ordinary disposable filter.
I bought the K&N filter cleaning kit from Euro Car Parts for about £14. It has enough cleaning fluid and oil to carry out 5 filter cleans.