2012 C4 Hybrid Batteries Replacement.

My daughter's car 2012 C4 with ~65,000 miles, I gave it to her three years ago, was having the error message "check hybrid system stop the vehicle in a safe place" but she still can drive it. Her boyfriend reset the message by disconnect the battery cable but it keeps coming back. First brought it to a local dealer they said they'll charge $185 maintenance fee for cleaning and replacing the exhaust fan. Left and saw a local Japanese Repair Shop to see if they charge less for it but they said it's the hybrid batteries problem and needed to go back to the dealer under warranty (still under my name). Call that dealer back they quoted $150 diagnostic fee (other dealer at $175) and if it's the batteries' problem there won't be any charge for that. Luckily it is and still covered by Toyota. Also she'll get a free loaner too tomorrow.

Only ~65K miles in 7 years, bought in June 2012, the hybrid batteries gone bad? I've heard they lasted more than 200K miles. Not sure how many years would be covered for the replacement.

 

Anyone knows the warranty for the replacement?

And if I transfer the title to her name/sell to someone: is it still covered under new owner?

 

Re-read my post you'll figure it out. Well:

1. First, they wanted $185 maintenance fee for cleaning and replacing the exhaust fan to see if it helps. Left.
2. Stop by a local Japanese repair shop and they're 100% sure hybrid batteries problem and suggested to get back to the dealer.
3. Back to the dealer and they agreed to do the diagnostic (need to pay $150 fee if Not failed batteries).
4. It IS and gotta wait for approval from Toyota.
5. Got a Free loaner while waiting for approval.

Update: they call the batteries pack arrived today and will be done by the end of tomorrow.