2015 Mustang Tail Light Bulb Replacement: A Step-by-Step Guide

Driving a 2015 Mustang can be a thrilling experience, but it can quickly turn into a nightmare if one of the tail light bulbs burns out. Not only is it unsafe to drive with a malfunctioning tail light, but it can also get you pulled over and ticketed. Fortunately, replacing a tail light bulb is a simple task that you can do yourself.

In this guide, we’ll walk you through the step-by-step process of replacing the tail light bulb on your 2015 Mustang. You don’t need to be a car expert to accomplish this task, so let’s get started!

Types of Tail Lights on 2015 Mustang

Before we get started with the replacement process, it’s important to understand the different types of tail lights on the 2015 Mustang. The 2015 Mustang comes with three types of tail lights:

Brake lights: These are the lights that come on when you press the brake pedal.

Turn signal lights: These are the lights that blink when you turn on the turn signal.

Reverse lights: These are the lights that come on when you shift the car into reverse.

Each type of tail light requires a different type of bulb, so it’s important to know which one you need before you start the replacement process.

Importance of Properly Functioning Tail Lights

Before we dive into the process of replacing tail light bulbs, it’s important to understand the significance of having functioning tail lights. Tail lights serve as an essential safety feature in vehicles. They indicate to other drivers when you are braking, signaling a turn, or driving in reverse.

If tail lights are not working correctly, you increase the risk of being involved in an accident. Therefore, it’s crucial to replace any burnt-out bulbs as soon as possible.

Gather the Necessary Tools and Materials

Before beginning the replacement process, you’ll need to gather a few essential tools and materials. These include:

  • A new tail light bulb (refer to owner’s manual to determine the correct bulb size and type).
  • Latex gloves (optional but recommended).
  • A flathead screwdriver.
  • A 10mm socket wrench.
  • Safety glasses

Safety Precautions

Your safety is paramount. Before starting the replacement process, take these precautions:

  • Park your Mustang on a flat surface and engage the parking brake.
  • Allow the vehicle’s engine and tail lights to cool down if recently used.
  • Put on safety glasses to protect your eyes from debris.

2015 Mustang Tail Light Bulb Replacement Guide

Now that you have everything you need, it’s time to get started. Follow these simple steps to replace Mustang’s tail light bulbs:

Step 1: Open the Trunk and Remove the Tail Light Assembly

Start by opening the trunk of your Mustang and locating the tail light assembly. Depending on Mustang’s model and trim level, you may need to remove a carpet or trim panel to access the assembly. Once you can see the assembly, use a screwdriver to remove any screws or fasteners holding it in place. Gently pull the assembly away from the body of the Mustang to release it from its clips and disconnect the wiring harness.

Step 2: Remove the Old Bulbs

Once you’ve removed the tail light assembly, you can access the bulbs. Look for the bulb sockets on the back of the assembly and twist them counterclockwise to release them from the assembly.

Carefully remove the old bulbs from the sockets and set them aside. Be sure not to touch the glass part of the bulb with bare hands, as the oil from the skin can cause the bulb to burn out prematurely.

Step 3: Install the New Bulbs

Take new tail light bulbs and insert them into the empty sockets, making sure they are secure and properly aligned. If necessary, refer to Mustang’s owner’s manual or a repair guide to ensure you’re installing the bulbs correctly.

Step 4: Reattach the Tail Light Assembly

With the new bulbs in place, it’s time to reattach the tail light assembly. Line up the clips on the assembly with the corresponding slots on the body of the Mustang and gently push the assembly into place.

Reconnect the wiring harness and reattach any screws or fasteners that you removed in step 1.

Step 5: Test New Tail Light Bulbs

Once you’ve reinstalled the tail light assembly, it’s time to test new bulbs. Turn on Mustang’s headlights and check that all of the tail lights are functioning properly. Test the brake lights, turn signals, and reverse lights to ensure they are working as they should.

Tips for Replacing Tail Light Bulbs

  •  Always wear gloves when handling bulbs to avoid getting oils from the skin on them.
  • Use a clean cloth or rag to wipe down
  • New bulbs before installing them to remove any dirt or debris that may have accumulated on them during packaging and shipping.
  • Make sure to purchase bulbs that are compatible with Mustang’s model year and trim level. Using the wrong bulbs can result in dim or non-functional lights or even damage to Mustang’s electrical system.
  • If you’re unsure about how to replace Mustang’s tail light bulbs, refer to the owner’s manual or a repair guide for detailed instructions and diagrams.
  • Consider upgrading to LED tail light bulbs for increased visibility and a modern, sleek look.

Frequently Asked Questions (FAQs)

Q: How often do I need to replace my Mustang’s tail light bulbs?
The lifespan of a tail light bulb can vary, but it’s generally recommended to replace them every 2-3 years.

Q: What type of bulb do I need for my 2015 Mustang’s tail light?
The 2015 Mustang requires a 7443 bulb for the tail light.

Q: Can I replace the tail light bulb myself, or do I need to take it to a mechanic?
You can replace the tail light bulb yourself, it’s a relatively simple process.

Q: Can I replace just one tail light bulb, or should I replace both at the same time?
It’s recommended to replace both tail light bulbs at the same time to ensure even lighting.

Q: What should I do if I accidentally break the tail light bulb during replacement?
: If the bulb breaks, make sure to carefully remove all of the broken pieces before inserting the new bulb.


The 2015 Mustang tail light bulb replacement process is very simple, that can be done at home with just a few tools. By following these step-by-step instructions and tips, you can easily replace a burnt-out or damaged bulb and ensure that Mustang’s tail lights are working properly.

Remember to always wear gloves and be careful when handling the bulbs to avoid damaging them. Properly functioning tail lights are an essential safety feature that should not be taken for granted. If you have any questions or concerns, don’t hesitate to reach out to a professional for assistance.

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