The 2020–2024 4Runner uses the same key setup, so everything on this page applies to those years too. The full picture is on the Toyota 4Runner key guide.
2021 Toyota 4Runner: key facts
- Key type
- Remote-head key
- Push-to-start
- No
- Transponder chip
- H (128-bit DST-AES)
- Programming
- OBD
- All keys lost
- We can originate new keys on site
HYQ12BEL remote-head key with the 128-bit H chip on key-start trucks (OEM key listings explicitly cover 2020-2021 production, transpondery.com carries the H chip through 2024, and no catalog shows a return to the older G key — we still check the H stamp on the blade); smart-key trims use 8A fobs (HYQ14FLA listings cover 2021-2023). For all-keys-lost on 2020+ smart-key vehicles, US jobs generally require Toyota server codes with credentialed (LSID/NASTF VSP) TIS access — Toyota's reset bulletin T-SB-0013-24 covers the 2022-2024 4Runner.
Same key system as the 2020–2024 4Runner
Toyota kept the 4Runner's key system unchanged across 2020–2024, so everything about replacing a 2021 key — blanks, programming, and what happens if every key is lost — matches the rest of that run. The full year-by-year breakdown lives in our Toyota 4Runner key guide.
What drives the price is the key type, whether you still have a working key, and where the car is parked. There's more on Toyota programming in general on our Toyota key page.
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Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.