The word "transponder" is a portmanteau of "transmitter" and "responder." Embedded inside the plastic head of your Toyota Etios key is a small, electronic microchip. This chip is passive, meaning it does not require a battery to operate.

| | DIY Immobilizer Programming | Hire a Locksmith | | :--- | :--- | :--- | | Free, takes 2 minutes | Requires $100+ tool and PIN extraction | $50–$150 flat fee | | Works for remote buttons only | High risk of locking ECU | Guaranteed result | | No risk to car | Can brick immobilizer | Includes cutting blade and programming |

Press the lock and unlock buttons on the remote simultaneously for 1–1.5 seconds, then press the unlock button. Exit: Close the driver's door to finish. Programming Without a Master Key (All Keys Lost)