2008 Hyundai Accent: DIY Ignition Lock Cylinder Replacement without key programming?

Question

Background: neither key would turn in the ignition after an hour of trying various things. Same/similar issue as in this thread, I think: https://www.reddit.com/r/Cartalk/comments/2pwlul/key_wont_turn_in_ignition_on_2008_hyundai_accent/ Roadside assistance got it to turn by spraying WD40 and hammering on the end of the key while turning it with pliers. Additionally, we had the same problem in 2014. The dealership replaced the cylinder and had it "coded" (i.e. mechanically matched) to our existing keys. So our doors locks still match the ignition keys right now. The ignition turns fine for the moment, but I imagine this problem will reoccur. Our keys are somewhat worn, so I think using a new cylinder with new matching keys would be best.

Full car info: 2008 Hyundai Accent, GLS 4-Door, SEDAN 4-DR, 1.6L L4 DOHC 16V (purchased in Ontario, Canada)

I want to do this myself, but I can't determine whether I need a dealership to do some sort of programming.

Part I would like to buy:

https://www.thewrenchmonkey.ca/products/auto-parts/bwd/CS1090L/

Question: if I buy the part online and do this myself, do I need to have the dealer (or someone) do programming anyway?

The part's description says both

This part is also a safety attribute since it does not accept any key which is not loaded with transponder code.

and

Key Programmable: No

I'm confused about how this works. If you can't program the keys, then how can they be made to match my car's transponder? (Where it says "Coding: Coded," I think that just means that the keys have been physically cut to match the tumblers inside the cylinder.) Or do I need someone to reprogram the transponder to match the keys...? I would love to be able to just replace the ignition lock cylinder and use the new keys that come with it. (Then I would just have different keys for the doors, and I could always have a locksmith match the doors to the new keys later on, or try that myself.)

Answer 1

For the record I am an automotive locksmith of over 20 years so I hope that I will be able to answer your question and any additional you may have.

The cylinder is pretty straight forward to replace. The one you have listed will work fine tho the keys do not look to have the chips in them, so you would need a chipped version duplicated to match them for programming. You are correct the "coded" part means the keys are already cut for the cylinder they come with.

To remove your old ignition you will need to remove the dash panel around it, remove the transponder key amplifier from around the ignition housing, then turn the key to the ACC (some are to the ON position). Look for a small hole in the lock housing (about 1-2 inches back) and use a small pick to press in the retainer pin. The cylinder will slide out. On your new cylinder, turn your key to acc or on position and then just insert it in to the housing. All done.

As for the programming, this can only be done with certain tools diagnostically or by direct eeprom writing. I recommend you just call a local locksmith to do it but there is another way I will go over if you want to try. (Do not just tape the old key to the transponder antenna and leave it under the dash)

Buy a HY6/HY022 KEY SHELL. Take this to a hardware store and have them duplicate the new key that came with your replacement ignition. Verify it works your ignition. Have them make a metal key copy of your original OLD key (for the door). Now, you need to remove the chip from your old key. I usually use a wire brush on a grinder to remove the rubber off the head of the key slowly. The transponder will be located in the lower left or lower right. Its small black wedge shaped device. Place this chip inside of your duplicated key shell and the job is done.