I had a 94 Lincoln Town Car (which iirc had the same starter as your Crown Vic), and when I sold it with 162k miles, it was still running the original starter. Now I've got a '03 Town Car, with 142k on it, and it also is still running the factory starter. So I'd say they're pretty stout, from my experience.
There's no such thing called "Estimate" on starter life, for there are a few factors that will shorten their service life:
- frequent cranking (starting)
-high viscosity oil cranking in extremely cold temperature
- short trips (frequent starting)
-engine out of tune (requires longer crankind duration)
-heat (yes, starter is afraid of heat)
Good 4 u if you get 136 kmiles out of your crown vic's starter.
I have over 170K KM (Over 100K Miles) on my Santa Fe and I drive 8-10 hours a day for my job and probably start the engine about 7-8 times a day and have been for the past 3 years and it's fine... That's over 7,000 Starts in brutally cold and hot humid summers.
I guess it's more luck of the draw than anything else...
Still on my original at 220k miles in my Integra (100 miles daily commute, and 900 miles SF/LA round trip every other week for about 4 years, so minimal starting)
But in my corolla it lasted only 70k miles with less then 4 miles a day.