Kidney transplants from a deceased donor last on average of 12 years and Kidneys donated from a living donor tend to last 15 years.
Kidney transplants don't last forever either so even if you or someone does get a kidney transplant then you'll need one again after 12 to 15 years to survive.
However people on dialysis can live from 10 to 30 years even after getting a Kidney Transplant.