The LED unit is sold separately. The part you linked at Rock Auto is the outside red lens only, it includes no light source. If what you have is truly 100% LED but not all of the LEDs are lighting up you need the LED module, which may need to be bought from Honda. Or check junkyards. Unbroken lights for the back of a car are easier to find than the front.
Originally Posted by mk378
The LED unit is sold separately. The part you linked at Rock Auto is the outside red lens only, it includes no light source. If what you have is truly 100% LED but not all of the LEDs are lighting up you need the LED module, which may need to be bought from Honda. Or check junkyards. Unbroken lights for the back of a car are easier to find than the front.