fordtruckman2003

I'm very confused what is causing this issue.
Both driver and passenger side the door sills at the rear door latch are rusting.
Rusting from the inside out.
This is the only rust on my whole truck I don't know why this is happening.

Anyone else have this issue? It's a closed box I don't see how water could get inside there to be causing this.

21RRF150

iTrader: (1)

Mine did that on the drivers side. Came up from inside the rocker panel.

fordtruckman2003

Driver's side is worse than passenger.
It's like the rocker panel is rusting inside out i don't see how this can happen. I thought I was doing everything right but I can't clean what I can't reach.
My ranger over ten years not a spot of rust on body and f150 is already rusting up at 7 years.

21RRF150

iTrader: (1)

That's exactly what's happening. That's what mine did. The rockers have that tape on the underside. If it falls off all that **** gets up there and sits

fordtruckman2003

Tape is still there I checked that. I'm so confused and angry.

knk

Water comes in from the 3rd brake light I believe. Sh!tty engineering at best.