Hey all,
So I am the owner of a Certified Pre-owned 2007 Hybrid Highlander. As my car crossed the 50k mile marker, my fuel economy dropped off by about 20% and has continued to decline. I have brought it into the dealer but their tests did not reveal any problems.
I suspect very strongly that the hybrid batteries have begun to loose their potency.
My local dealer has no additional diagnostics beyond a red-light, green light test.
Has anyone out there replaced their hybrid batteries, diagnosed them or seen similar fall-offs in economy?
Thanks for your help.