Only Genuine Hyundai Parts??
 

I have been battling with the oxygen sensors on our 99 Accent for over
a year now. Replaced one, was told other needed replacement. Replaced
that and was told first one was fried. Was driving me nuts since gas
milage was getting worse as was pick up.
So after 4 trips to the mechanic I was told by the "new" mechanic(not
my choice of people to have working on my vehicle) that the problem is
that Hyundai's need GENUINE Hyundai parts for repair and one can not
use generic parts like oxygen sensors for both bank 1 and bank 2.

If this is the case then WHY do they sell these parts for use in
Hyundai's? Or is my gut feeling right on this and the slug is scamming
me and my family?