If your Toyota’s radio displays “SEC” or “ENTER CODE” after a battery replacement or power loss, you’re not alone. Many Toyota owners face this issue, but the good news is that you can get the unlock code for free — without paying shady websites or dealership fees. Why Does the Radio Lock? Toyota radios have a built‑in anti‑theft feature. When the radio loses continuous power (e.g., dead battery, disconnected terminals), it locks and asks for a unique 5‑ or 6‑digit code . This prevents thieves from using the unit in another car. How to Get Your Free Toyota Radio Code Method 1 – Check Your Owner’s Manual or Glove Box Look for a small card or sticker labeled “Radio Code,” “Security Code,” or “Anti‑Theft Code.” It’s often tucked inside the owner’s manual pouch, on the side of the glove box, or inside the center console.