In uk.d-i-y "Dave Plowman (News)" wrote:
Most common reason here for a remote to stop working (other than the
battery) is the switches. 'Tactile' types, and easily replaced. New cases
can be bought for most on Ebay.

Beyond the switch, the battery and the plastic case there's not much else to go
wrong. All of those parts are available (may have to fish around ebay or
Aliexpress for the case).

If you lose it, there may be a procedure to pair a used ebay fob with the
car, either via OBD or some other process (google 'toyota chicken dance').
DYOR.

Theo