Prius 2011 warranty question,,,help....

Just document your receipts and note that you serviced it yourself in the maintenance log.

 

In the U.S., they cannot automatically void the warranty for work performed DIY or by non-Toyota shops. They must specifically show how you screwed it up.

The maintenance schedule does not call for changing that fluid now, so they also cannot deny warranty coverage for electing to not change it at this time.

 

and, there is no way they can know you changed the fluid, should your tranny bite the dust.

 

Bruno, you do not let us know where you are. Toyota's warranty will be different in different countries. If you are in the US (please fill in your location in your profile as the answer to every question you ever ask will start "You don't tell us where you are") then the Magnuson Moss Warranty Act makes it the manufacturer's burden to prove you are to blame in a court of law, they can not just decide on their own.

 

I'm pretty sure the maintenance guide in the owner's manual does not have an interval for transmission fluid change on the prius

 

Four quarts would do, it'll start coming back out somewhere around 3.5. Get the car raised and level, remove the fill bolt, then the drain. Retorque drain bolt with new washer to 29 lb. Thread funnel with 3' hose extension (3/8" dia or less to be sure to fit). You can pour in 3 quarts with gusto, then slow down on the 4th, pour a bit at a time 'till it starts coming back out. Helps to have an assistant. Then torque fill bolt with new washer, to 29 lb again.

I'd suggest to take off the engine underpanel, keep the fasteners sorted, there's two that are a bit bigger, at the oil access flap. The bolts need a 10 mm hex key style socket.

$160 from the dealership is kinda steep. People in Canada had it done at a dealership for $79, which is pretty good. Anything under $100 is reasonable, considering it's a bit unusual. I've done ours a couple of times now, DIY, it's not difficult.