The 2016–2020 Sienna uses the same key setup, so everything on this page applies to those years too. The full picture is on the Toyota Sienna key guide.

2020 Toyota Sienna: key facts

Key type: Transponder chip key
Push-to-start: No
Transponder chip: Varies by trim — we confirm by VIN
Programming: OBD
All keys lost: We can originate new keys on site

Final XL30 year: bladed-key catalog rows end at 2019 but the H chip almost certainly carries through 2020, and smart-key trims stay on the DST80 smart system (transpondery.com lists it through 2020) — we confirm from the key in hand before cutting.

Same key system as the 2016–2020 Sienna

Toyota kept the Sienna's key system unchanged across 2016–2020, so everything about replacing a 2020 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 Sienna 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.

We cover all these cities

Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.

Last updated 2026-10-11.

2020 Toyota Sienna key replacement

2020 Toyota Sienna: key facts

Same key system as the 2016–2020 Sienna

We cover all these cities