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After 11 years, I think for peace of mind, changing these are a no brainer. I'm not sure if they changed the lower hose clamp for 2000 but my 99 had a sealed clamp that took some time and patience to remove. Not just the ordinary hose clamp type.
I do know if you were on the road and had to changeout this lower hose, you would be in a world of hurt.
Change it now before you need a tow. The top hose, taking the brunt of the engine heat, should have been changed long ago in my opinion.