On my 2003 3500 SRW QC 4x4, my first water pump started leaking at 98K in 2015. The dealer replaced it with a mopar/cummins unit. A little over two years later the new one failed with about 10k on it. I was driving out in the boonies when it failed and just happened to make it to a nearby rest area near Trinidad Colorado on a 4th of July weekend. I tried calling someone, everyone was gone for the holiday. A nice Hispanic man who worked there offered to go to town to get one over his lunch break! I gave him the cash and he came back with a new one and antifreeze. I changed it in the parking lot at the rest area and it took me about 90 minutes including waiting for the pump to arrive. It was easy to change, I could do it again in 30 minutes.
While the newer pump should have lasted longer, this is my first Cummins pump I must credit Cummins for designing it to be easy to change! All you need is a 1/2" long handled ratchet or a short breaker bar for the belt tensioner, I think a 12mm or 14mm socket and short extension to get the pump off and on and spit to hold the gasket onto the new pump when re-installing. Funniest thing were the people who walked by while I was working on it, they couldn't believe someone could do that. I haven't changed a water pump on a vehicle for some time, and this was my first on the road breakdown of any Dodge truck that I've owned since 1994. I just happened to have a small set of tools, I usually carry my big set but I figured "I've never had a problem before"... so I left my tool boxes at home for that 1600 mile trip.
Now I don't leave home without a new water pump, belt, anti-freeze, a 24 pack of bottled drinking water, tools and most importantly a good quantity of CASH on longer trips.