Hello all. Merry Christmas and a Happy New Year to you all. Injector query

[Mr. Hurley]

Hi all. I own a 2013 LWB 3L Diesel land cruiser. The first injector went on 100k km & Toyota replaced it. Just that one & not all 4. I have had the remaining 3 replaced at my own expense in the following 100k km. My query is two fold.
1. Should as I believe, Toyota have changed all injectors as there is a domino effect in damaged/blocked injectors?
2. Has anyone else had similar or the same issue with Toyota Land cruiser of the same vintage.
I need to know am I alone in this as the Garage & Toyota are making it look like it's my fault & not the fault of Toyota or their injectors.
Thanks for taking the time to read this.

[Nailer]

Hi, I dont know of any issues with toyota injectors.
The injector seats were an issue with the 120 series but haven't heard of it with the 150 series. They can seize resulting in a miss fire.
There should not be a domino effect with injectors.

Did Toyota say what the issue was with the injector?