2016 CX-5 hatch rattle; nut size needed

[txt990]

My 2016 CX-5 sport has been making a rattling sound in the rear. As it turns out when you lift the hatch, the right nut is missing. I guess this nut holds the spoiler. On the left side it was loose and I tightened it. What is the part # or type of nut that I can use?

 

[N7turbo]

I would take the other one to the hardware store and match it up.

 

[RedBaron]

It will be a metric nut. If you have calipers (or even a ruler) measure the diameter of the bolt (or inside diameter of the other side nut). Chances are it's 5mm, if so, you'll need an M5 nut.

 

[stickerbush]

Part # 90040-0663, a flange nut, size not given in parts diagram. The original nut may have fallen down inside the hatch, maybe try snaking a magnet in there to see you can retrieve it.