DIY Cost: $50-$150 Est. Time: 25 min Difficulty: Easy Summary In this article, you will find step-by-step instructions with photos on how to replace the tail light assembly on the Hyundai Sonata model years 2011-2015. What you will need Parts Hyundai Sonata taillight assembly Tools 10mm socket wrench small ratchet Procedure Open the trunk. Remove the trunk panel cover by using a Philips screwdriver to detach plastic retaining screws gently. To remove the taillight assembly, use a 10mm socket to loosen and remove retaining nuts from the side of the trunk and inside the trunk panel. Disconnect electrical connection from the taillight assembly. Push taillight assembly from inside the trunk panel to remove it. Or grab the taillight assembly from outside the trunk, then pull. View of taillight assembly. Prepare the new taillight assembly. Install the taillight assembly from outside the trunk, then push it in to fit on the trunk. Install retaining nuts. Reconnect electrical connector. Reconnect trunk panel cover. Secure trunk panel cover by re-installing plastic retainers. Frequently Asked Questions When will you replace your taillight assembly? You will only need to replace your taillight assembly when it has cracks or completely broken. Can you drive a car with a broken taillight assembly? It's illegal to drive with a broken taillight bulb, so you will need to replace it before going back on the road.