In the Importance of air filter article can be read about why the air filter is needed to be changed regularly.
According to the regulations of the manufacturer the air filter is needed to be changed after every 40 thousand kilometres.
By another point of view the air filter is needed to be changed if it cannot permeate enough amount of air to the engine.
All of the two cases the task is the same: we have to change the air filter.
What you need:
- new air filter for D16W7 engine
- wet kerchief
- 10 mm pipe wrench
- about 15 min.