Firewall Flex, Brake Booster.

[CGJ]

Hi, I have a 2018 NP300 Navara which has a Flex in the firewall when you press on the brakes.
The booster moves about 10 mm, has anyone had this problem and is there a solution.

 

[Old.Tony]

There was a problem with Navara D40s in the early 2010s, the firewall cracked and Nissan repaired some (others went and had it welded up). I would not have thought that a 2018 NP300 - with a different body - would suffer the same.

I don't know how good your warranty is, but I'd have someone take a look at the brake booster mounting and make sure it's secure and see if there's something about the firewall that's contributing to the problem (like a crack in the metal).