Dear Bro,
Its very easy, just to to any Toyota guy and ask him to just remove the beep, the indicator of seat belt and the functionality will be there, only the beep will be silent.
Brother you must develop the habit of wearing seat belts, it's very very important, since your ride had air bags, you have no reason to avoid using your seat belt.
Get rid of the beep if you want but develop the habit of using seat belts
Cheers
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