Hopefully this will benefit someone here. After checking/cleaning connections I was still experiencing intermittent operation until the camera just stopped working altogether.

I didn’t want to spend the money on OEM so took a chance on a $30 eBay replacement.

https://ebay.us/m/8shooP

This one is a direct replacement and fit perfectly on my 2011 FX4 F140, even the guide lines started working again. It’s been working great for about three months now.

I’m not affiliated with the seller, just passing along what worked for me.

 

Ive seen a lot of claims they work but they always have something not right, like the lines are off center or not as clear, especially at night. Hope it works out fine for you indefinitely.