I had to replace mine at 170,000km. Im now close to 200,000km without any issue.
Order a "Denso" brand from rockauto. they are the OEM for Acura without the Acura label, so your still getting great quality. They have pretty good prices if you're shipping to Canada. its about $380CAD without shipping.
Beats me, One day the A/C started to put out warn air intermittently then it suddenly stopped cooling.. After diagnosis I came down to the conclusion the Stator Coil burned up, Replaced it and Now its all good again.
I do live in an area that sees 120°F so overheating could be a good reason for it to fail.