Locked out of your Hyundai stereo after a battery change? Here's exactly what to do.
If your Hyundai radio is showing a lock message and will not play, the anti-theft system has activated — almost always after the battery has been disconnected or gone flat, or after the unit has been removed and refitted. The radio stays locked until the matching factory code is entered.
This is one of the most common lockouts we see, since it happens any time a Hyundai battery is disconnected for routine work such as a battery swap, alternator or starter job, or leaving the car unused long enough for the battery to drain. It is not a sign anything is wrong with the radio — the anti-theft system is simply doing its job.
Hyundai units typically show CODE or LOCKED when they want the unlock code, sometimes with an attempt counter once a wrong code has been tried. The stereo itself stays in the dash the whole time — nothing needs to come out to fix this, which is one of the easier lockouts to sort compared to brands that need the unit removed.
Hyundai and Kia are sister brands built on shared platforms, but their radio lockout systems are not identical. Kia only needs the VIN to look up a code. Hyundai needs both the VIN and the radio's serial number — the VIN alone is not enough to match a Hyundai code. The serial is usually printed on a label on the top or side of the unit, visible once the surrounding dash trim is eased back, or sometimes on a sticker in the glovebox or under the fuse cover. Send us both numbers and we match them to the correct factory code.
Standard orders are usually turned around within the hour, with 24 hours as the outside window. Express orders go to the top of the queue and are guaranteed under an hour. We process orders every day of the week, with no closed hours.
Entry is usually done with the preset number buttons on the front of the unit, though the exact sequence varies by model year and head unit generation. We send the specific entry steps for your unit along with the code. Newer Hyundai infotainment systems running UVO software often do not lock at all after a battery disconnect — if your screen has come back on its own without asking for a code, you likely will not need one.
If a wrong code has already been entered and the screen is showing an attempt count or a wait period, avoid guessing again — too many wrong attempts can extend the lockout further. Send us your VIN and serial and we will get you the correct code the first time.
We have supplied factory car stereo unlock codes since 1998, with a money-back guarantee: if the code does not work, you get a full refund, no questions asked. Thousands of Hyundai owners have used us to get their radios playing again.
Need help entering it? See the Hyundai input manual.