I am the latest victim of the rusted through drain nipple and the resulting water ingress. I’ve not yet decided on my choice of fixes, however I have implemented a quick fix.
Accessing the issue by partially removing the rear door seal such that I could get my hand between headliner and roof, I have push fitted a length of garden hose over the remainder of the nipple, keeping it in place with a towel pushed behind it, and trailed it into a receptacle on the back seat, per attached pic.

Good idea

So what’s the long term fix for this? One of the things making me hesitant to move on…..

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Out of interest what year vehicle? _______________________________________________

2019 4.4 V8 Diesel Range Rover Autobiography, Byron Blue

2013

Long term fix.... best approach to keep the drains clear and clean. There are a couple of options described elsewhere on this group; I will be aiming for a simple solution in the coming days, and will report on progress and degree of success. J

Thanks for answering my quick query. Thought it was happening to them all, but if they don’t corrode if kept clear, that’s a bit easier to check..thanks..
 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport