Replacing the tail lights on a 2018 Jeep Wrangler is a task that many car owners can handle themselves. Whether your tail light is cracked, not working, or you want to upgrade to a different style, doing it yourself can save money and time. This guide explains each step in clear language, so even if you are new to car repairs, you’ll understand what to do. You’ll also learn some helpful tips, common mistakes to avoid, and how to choose the right replacement parts.
Understanding Your 2018 Jeep Wrangler Tail Light System
Before starting, it’s important to know a little about the tail light assembly in your Jeep. The 2018 Wrangler uses a modular system, meaning each tail light is a single unit that can be removed and replaced. The unit contains the brake light, reverse light, and turn signal. LED versions are common, but some models use standard bulbs.
A typical tail light lasts around 5 years, but damage from impacts or moisture can shorten its life. Replacing a broken tail light quickly keeps you safe and avoids legal trouble, as driving with a faulty tail light is illegal in most US states.
What You’ll Need
For this replacement, you’ll need a few basic tools:
- Phillips screwdriver
- Flathead screwdriver (optional, for prying)
- Socket wrench (usually 10mm)
- New tail light assembly compatible with the 2018 Wrangler
- Gloves (to keep the bulbs clean)
- Clean rag
Having the right part is critical. The 2018 Wrangler has different trim levels, so check your vehicle’s specifications. Using the wrong tail light can cause fit or electrical problems.
Step-by-step: How To Replace Tail Lights
1. Open The Tailgate
Start by opening the rear tailgate. This gives you access to the tail light’s mounting screws, which are only visible with the tailgate open.
2. Remove The Screws
Locate the two screws holding the tail light in place. They are along the inside edge, facing the center of the Jeep. Use your Phillips screwdriver or socket wrench to unscrew them. Place the screws in a safe spot.
3. Pull Out The Tail Light Assembly
Gently pull the tail light assembly straight out. If it feels stuck, wiggle it side to side. Avoid using too much force, as the clips or wiring could break.
4. Disconnect The Wiring Harness
On the back of the unit, you’ll find a wiring connector. Press the tab and pull to disconnect. If you see dirt or corrosion on the connector, clean it with a rag before installing the new light.
5. Install The New Tail Light
Connect the wiring harness to your new tail light. Listen for a click to ensure it’s fully connected. Test the lights before final installation—turn on your headlights, press the brake, and use the turn signal to check all functions.
6. Reattach The Tail Light
Slide the new assembly into place, aligning the tabs and holes. Secure it with the screws you set aside earlier.
7. Close The Tailgate And Check
Close the tailgate and check that the tail light fits snugly and works correctly. If something doesn’t function, double-check the wiring and connections.
Common Mistakes To Avoid
- Forgetting to test lights before final installation. Always check that everything works before tightening screws.
- Forcing the assembly if it feels stuck. Gently wiggle instead of prying hard.
- Touching bulbs with bare hands (for non-LED units). Oil from your skin can shorten bulb life.
Oem Vs Aftermarket Tail Lights
When choosing replacement parts, you will see OEM (Original Equipment Manufacturer) and aftermarket options. Here’s a comparison to help you decide:
| Feature | OEM | Aftermarket |
|---|---|---|
| Fit & Compatibility | Guaranteed | May vary |
| Warranty | Usually included | Varies |
| Price | Higher | Lower |
| Style Choices | Limited | Many options |
If you want the same look as before, OEM is best. For custom looks or lower price, consider aftermarket—but check reviews to avoid poor quality.
How Tail Light Replacement Affects Safety
A working tail light helps others see you, especially in bad weather or at night. According to the National Highway Traffic Safety Administration (NHTSA), rear lighting failures contribute to over 20,000 accidents each year in the US. By replacing a faulty light right away, you reduce the risk of collisions.
Cost Comparison: Diy Vs Professional
It’s helpful to know how much you can save by doing this yourself versus visiting a mechanic.
| Replacement Method | Average Cost | Time Required |
|---|---|---|
| DIY | $50–$200 (part only) | 30–60 minutes |
| Professional Shop | $120–$350 (parts & labor) | 1–2 hours including wait |
DIY can save you over $100 and lets you choose your preferred part.
Two Important Tips Most Owners Miss
- Check both sides: If one tail light is out, the other might soon fail too. Consider replacing both at the same time for even lighting and fewer future repairs.
- Seal the area: After installation, inspect the seal around the tail light. Gaps can let water in, leading to corrosion or electrical issues.
When To Call A Professional
If you notice electrical problems, such as multiple lights not working or warning messages on the dashboard, the issue may be deeper than just the tail light. In these cases, a visit to a Jeep-certified mechanic is safest.
For more details on vehicle lighting standards, you can read the NHTSA guide on lighting.
Frequently Asked Questions
What Size Are The Screws For The 2018 Jeep Wrangler Tail Light?
The screws are typically 10mm hex head bolts. Always double-check your vehicle, as some trims use different hardware.
Can I Replace Just The Bulb, Or Do I Need The Whole Assembly?
Most LED tail lights require full assembly replacement. If your Jeep has standard bulbs, you can replace just the bulb, but many 2018 models use sealed LED units.
Is It Legal To Drive With One Tail Light Out?
No, it is not legal in most states. You could get a ticket and it’s unsafe for you and other drivers.
Do I Need To Disconnect The Battery Before Replacing The Tail Light?
It’s not required, but disconnecting the battery can prevent electrical shorts, especially if you’re not experienced with car wiring.
Will Aftermarket Tail Lights Void My Jeep’s Warranty?
Aftermarket parts may affect warranty on the tail light system, but should not void the full vehicle warranty. Check with your dealer for details.
Replacing the tail lights on your 2018 Jeep Wrangler is a manageable project with the right tools and instructions. Take your time, use quality parts, and always test the new light before finishing the job. This keeps your Jeep safe, legal, and looking its best on the road.
