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Is your thermostat housing plastic or metal? If plastic, consider a replacement. My plastic housing split with no warning.
Pushing up against 220k miles on my 05 hatch.

Maybe a new thread could be started for bizarre problems? I haven't had the warm key thing, but the clock burnt-up on me. Couple years later my horn went off while parked and would not stop. I...

Time to start saving to replace the timing belt, and while you're at it, the water pump. I had both replaced around 80K miles just to be on the safe side. 2005 LS 5 speed hatch, no AC. >209K miles...

209k+ miles on my Michigan 2005. Third water pump. Just keep up with the regular oil changes and fix what breaks in a timely manner.
Other things have been replaced too, front struts, wheel...