The 2000–2004 Corolla uses the same key setup, so everything on this page applies to those years too. The full picture is on the Toyota Corolla key guide.

2003 Toyota Corolla: 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

Catalogs genuinely split for 2003-2004: transpondery.com carries the US 4C era only through 2002, other catalogs keep 4C through 2004, and some Ilco-aligned listings date the 4D-67 'dot' key from 2003 — we verify the chip from the key stamp or VIN before cutting.

Same key system as the 2000–2004 Corolla

Toyota kept the Corolla's key system unchanged across 2000–2004, so everything about replacing a 2003 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 Corolla 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.

2003 Toyota Corolla key replacement

2003 Toyota Corolla: key facts

Same key system as the 2000–2004 Corolla

We cover all these cities