Literally took 5 minutes each side install.
When taking off the mirror cover make sure to start from the corner away from the car. (If youre face the car as you see in my pic, start with the top left corner and pull from there. The other side has small tabs that may easily break.) It will feel like you are breaking the clips but it really isn't causing any damage. so just pull it off. :)
When taking out the old lights, There are two Phillip screws inside, be sure to loosen and take them out. The tricky part is taking out the actual light unit because there will be a tab in the middle. You'll have to pinch the tab and pull it towards you to take the unit out. (Pretty simple, you'll see it right when you take the cover off)
When putting the new unit in, make sure you connect the pink wire with the new units red wire. It's a plug and play but you have to make sure you get the right side to connect. After everything done just reverse the steps and connect everything back together.
Really simple and easy modification for the 2019+ rav4.
I would also like to say, the customer Service is absolutely amazing!! I would recommend this seller and their products to anyone !