2018 Hyundai Sonata Trunk Won’t Open : Easy Solutions

Have you encountered the frustrating situation that your 2018 Hyundai Sonata trunk won’t open? Whether you’re facing an emergency or simply can’t access your belongings, a malfunctioning trunk can be a major inconvenience. Do not worry; this guide will give you the information and troubleshooting methods to solve this mystery.

Embark on a journey of discovery as we delve into the potential causes behind your stubborn trunk, ranging from electrical glitches to mechanical malfunctions. We’ll uncover the intricacies of the 2018 Hyundai Sonata trunk release system, guiding you through a step-by-step process of diagnosing and resolving the issue.

Along the way, we’ll provide clear instructions, accompanied by illustrative images, to ensure you’re well-equipped to tackle the challenge. You can fix your trunk and have access to your valuables with the help of this guide, regardless of your level of experience as a mechanic or do-it-yourselfer. 

Understanding the Trunk Mechanism of the 2018 Hyundai Sonata

To effectively tackle trunk opening issues, it’s crucial to delve into the underlying mechanism that governs trunk operation.

At the heart of the system lies the trunk latch, a spring-loaded device that securely locks the trunk’s lid when closed. This latch is connected to a release cable, which, when activated, triggers the latch to release and allows the trunk to open.

The release cable can be actuated in two ways: electronically via the key fob or manually using the emergency release cable. When the key fob button is pressed, a signal is sent to the trunk release module, which energizes the release actuator. The actuator pulls the release cable, causing the latch to disengage and the trunk to open.

Why is your 2018 Hyundai Sonata trunk not opening?

There are a few reasons why the track on a 2018 Hyundai Sonata trunk won’t open.

  • The trunk latch may be frozen: In the winter, this is a typical issue. If the latch is frozen, you can try to thaw it out with a hair dryer or by pouring warm water over it.
  • The trunk release cable may be broken: The trunk release cable is a metal cable that runs from the trunk release button inside the car to the trunk latch. If the cable is broken, the trunk will not open. You can check the cable by opening the hood and looking for a frayed or broken cable.
  • The trunk release switch may be faulty: The trunk release switch is the button that you press to open the trunk from inside the car. If the switch is faulty, it will not give a signal to the trunk latch to open the trunk. Press the button and listen for a click to verify that it is working. If there is no click, the switch is broken.
  • The fuse for the trunk release may be blown: The fuse for the trunk release is located in the fuse box under the hood. If the fuse is blown, it will not allow power to flow to the trunk release switch or the trunk latch. You can check the fuse by looking for a blown fuse. You will need to replace the fuse if it has blown.

Troubleshooting Common Trunk Opening Issues in the 2018 Hyundai Sonata

There are some common issues you can face with your trunk. But no worries; from now on, you can fix it yourself. Here is a troubleshooting guide for some common problems: 

Scenario 1: Trunk Won’t Open Using the Key Fob

  1. Check the Key Fob Battery: A depleted key fob battery can disrupt the signal transmission, preventing trunk release. Put a new battery in its place.
  2. Test Alternative Key Fob: If available, try using a different key fob to rule out a faulty fob.
  3. Verify Trunk Release Module Functionality: Consult a qualified mechanic to check the trunk release module for any malfunctions.

Scenario 2: Manually Opening the Trunk Using the Emergency Release Cable

  1. Locate the Emergency Release Cable: The emergency release cable is typically situated near the trunk latch assembly. Refer to your owner’s manual for its exact location.
  2. Pull the Emergency Release Cable: Firmly pull the cable towards the interior of the vehicle. This will disengage the trunk latch and allow the trunk to open.
  3. Secure the Emergency Release Cable: Once the trunk is open, securely fasten the emergency release cable in its original position.

Scenario 3: Troubleshooting Trunk Latch and Release Mechanism Issues

  1. Inspect the Trunk Latch: Check the trunk latch for signs of wear, damage, or corrosion. A damaged latch may need replacement.
  2. Lubricate the Trunk Latch: Apply a lubricant, such as WD-40, to the latch mechanism to ensure smooth operation.
  3. Examine the Release Cable: Inspect the release cable for signs of fraying, kinks, or damage. A damaged cable may need replacement.
  4. Check the Release Mechanism Connections: Ensure that the release actuator and release cable connections are secure and free of corrosion.

Preventive Measures to Minimize Trunk Opening Problems 

Regular maintenance and preventive measures can significantly reduce the likelihood of encountering trunk opening issues in your 2018 Hyundai Sonata. Follow these important guidelines:

  1. Regular Maintenance: Schedule regular maintenance checks with a qualified mechanic to ensure the proper functioning of the trunk opening system.
  2. Lubrication: Regularly lubricate the trunk latch and release mechanisms using a lubricant like WD-40 to maintain smooth operation and prevent rust or corrosion.
  3. Cleanliness: Keep the trunk area clean and dry to prevent debris buildup that could interfere with the latch mechanism.
  4. Gentle Handling: Avoid slamming the trunk lid or forcefully opening the trunk, as this can put undue stress on the latch and release mechanisms.


What are the signs of a faulty trunk latch? 

Here are some of the most common signs of a faulty trunk latch:

  • The trunk won’t shut or lock properly.
  • The trunk is difficult to open.
  • The trunk makes a strange noise when you try to open or close it.
  • The trunk light stays on even when the trunk is closed.
  • The trunk latch is loose or damaged.

How do I reset the trunk release mechanism?

Resetting the trunk release mechanism on a 2018 Hyundai Sonata typically involves accessing the manual release cable located on the trunk latch.

To do this, you’ll need to remove the small rubber grommet near the trunk lock on the driver’s side of the vehicle. Once the grommet is removed, you’ll see a slot where you can insert a flathead screwdriver. Turn the screwdriver to unlock the trunk latch.

Where is the emergency release cable located?

The emergency release cable for the 2018 Hyundai Sonata is located in the trunk, near the rear seat on the driver’s side. To access the cable, you will need to remove a small plastic cover that is located at the base of the seat. Once the cover is removed, you will see a cable with a loop on the end. Pull on the cable to release the trunk latch. 


Mastering the art of trunk opening can be a lifesaver when faced with a stubborn 2018 Hyundai Sonata trunk. By understanding the underlying mechanism, utilizing the emergency release cable, and practicing preventive measures, you can regain access to your belongings and prevent future trunk troubles.

Embrace your newfound trunk-opening expertise, and let your Sonata’s trunk no longer hold you back!

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