sunglasses holder?
The oil pan , the oil pan drain plug . etc.
the back thing of a car is a boot or often know as trunk. Also on top of the trunk is a thing called a spoiler
Volkswagen
"Could have forgotten" is the complete verb phrase in the sentence, "Could you have forgotten your sunglasses in the car."
located at front of the car-on the thing that holds air breather.
Channel? Regulator? It is a regulator clip. I just recently replaced mine. You can get them online at GM parts direct.
Mini car, sub-compact car are 2 I can thing of.
The center of a tire is called the rim, its what holds the air inside and the car standing ;D
A visor.
It could be called the grille.
It's the air intake housing which usually starts near the front of the car and goes back to the top of the engine. The whole unit is the intake, specifically the air filter is held by the air filter housing.
It is called a speedometer. It also has a thing built in called an odometer to tell you how many miles you have traveled.