Friend and I did first oil change on the emira and the driver side plastic caps came off. They are literally epoxy'd or hot glued on by the factory. Afterthought af. We used a 3M double sided auto 1/2 inch tape to secure the cap back onto the diffuser mouth. I'd highly recommend doing this.
May I ask, what's the ultimate QJ to get for Emira? My other cars are E36 and a corolla. Would QJ 5000TL work?
I understand that the sticker end has to be at the rear jack point and the front aspect has to be at the frame point where it begins to turn inward.