I have a 2015 Police Interceptor sedan. It has a 3.7L v6, AWD and My beauty runs like clockwork. Currently at 145k miles and still going smooth.
I am concerned, however with the dreaded water pump issue.
Can anyone recommend what is the best time after a 100k is to have it changed? I purchased it with 124k miles and now have 145k miles on it. Thanks

 

I have 2014 FPI sedan with 3.7. It is x RCMP car i bought in 2018 with 184 000 kms (115,000mi) now have 215,000 kms (134,000mi). I noticed my coolant down and had to top it off 2 times. No leaks noticed on ground. Next oil change my mechanic said there was a coolant seep from the weep hole. No sign of coolant in the oil. I had them change the waterpump, timing chain, guides, plugs, oil pump, coolant flush, oil change, PTU fluid change. They did it in 3 days. They did not pull the motor, just did it on the side of the engine. Total was about 1500 parts and fluids and 2 000 in labour us 15% tax total was almost $4,000 CDN.
the car runs perfect. They also noticed both rear axles light leaking at differential. I had them replaced a month later. I heard of other owners getting high mileage without an issue. I think that a coolant change prevents the coolant from getting acid and eating the waterpump gaskets. Long and short.. keep eye on coolant level and check your oil once a week for any leaks.