Quick story I had a friend of the family go into a quick lube and they sold her an air filter.
When replacing the air filter the oil changer wiped out the air filter housing and got distracted and left the rag in side and under the air filter.

When he started it up the rag got sucked into the engine and bent an intake valve.
The shop did pay to have the engine fixed but the car never ran the same again. A flat rate mechanic at a dealership repaired the engine cutting corners and the car had multiple problems after the engine service.

Most mechanics are not as good at putting engines together as the factory is. Even if they are not cutting corners. It takes a lot of skill and knowledge to perform engine work properly.

Avoid all these problems and learn how to replace your own air filter

More reasons for do it yourself auto repair