Same problem happened to me this week on a 2007 model. We took the car to the dealer to get a new driver side sunvisor fitted, they noticed oil leaking at the time (no sign of any in the garage at home so assume it had only just started to leak). So in a way we were lucky we were at the garage at the time so it went straight in for repair. As per this thread it was a small hole in the rubber hose and this was the replacement part(s)... 71DE89ODKHL._SL1500_.jpg TO1576731020 PIPE, OIL COOLER $188.98 TO1149631010 GASKET, OIL HOLE $4.76 TO1578531010 GASKET, OIL COOLER $6.38 Plus $299.88 Labour (Total Bill $550) Ouch for a small hole in a rubber hose! I'm well past my warranty (did buy the car from new from the same garage that did this repair) so I didn't try to get Toyota to contribute...should I?