[Update] Where mechanics look for key code on 1999 Hyundai Sonata

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Need my 1999 Hyundai Sonata's key code to program a spare key - where to find?

Hello! We've developed a VIN-based tool to help you get your key code for the 1999 Hyundai Sonata. Check it out here: VIN Key Code Generator.

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Anyone have luck with this on a 2015 1999 Hyundai Sonata?

Was about to tow my 1999 Hyundai Sonata. Let me try this first.

Trying to figure this out for my 1999 Hyundai Sonata too!

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Security Systems
A flashing security light often indicates an immobilizer issue. Solid light suggests the system is armed but not recognizing your key. Causes: faulty key chip, damaged antenna ring, low battery, or system needs reprogramming.
Lost Keys
Locksmiths or dealers can: 1) Decode your door or ignition lock to determine key cuts 2) Access your car's key code through manufacturer databases (with proof of ownership) 3) Program new transponder keys using diagnostic equipment.
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Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
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Key Programming
Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
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