This components are in an OBD2 reader - on each input pin.
Please help me to identify.

Thanks in advance.

 

"M" with its toes tucked in = Matsushita
Became Panasonic in 2008
I suspect they are over-voltage protectors like this:

 

Many thanks!

 

Hi,

Since the label is K1/K2/K3/K4 maybe it is a solid state relay.

 

Yep, Solid state relay. See here

 

I don't know how you figured out the AQY part, but you did a better job than I did.