The 2010–2023 GX uses the same key setup, so everything on this page applies to those years too. The full picture is on the Lexus GX key guide.

2019 Lexus GX: key facts

Key type: Smart / proximity key
Push-to-start: Yes
Transponder chip: Varies by trim — we confirm by VIN
Programming: OBD
All keys lost: We can originate new keys on site

GX460: HYQ14ACX smart fob (GNE board 271451-5290). Catalog listings disagree on the chip inside this fob — most describe it as 'DST+'/DST80, but at least one lists DST40 — so we match replacements by the fob's FCC ID and board number, not the chip label. All-keys-lost via OBD smart-code reset with professional tools; reused OEM fobs need an immobilizer reset.

Same key system as the 2010–2023 GX

Lexus kept the GX's key system unchanged across 2010–2023, so everything about replacing a 2019 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 Lexus GX 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 Lexus programming in general on our Lexus 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.

2019 Lexus GX key replacement

2019 Lexus GX: key facts

Same key system as the 2010–2023 GX

We cover all these cities