2018 Jeep Cherokee Bulb Sizes & Replacement Guide

Quick Reference

The 2018 Jeep Cherokee offers a range of lighting options, from standard halogen setups to advanced HID and LED systems, depending on the trim level. This guide provides a comprehensive overview of the bulb sizes you'll need for your Cherokee and considerations for upgrades and replacements.

For models equipped with the standard halogen headlights, the low beam utilizes an H11 bulb, and the high beam uses a 9005 bulb. However, many higher trim levels, such as the Limited, Overland, and Trailhawk, came with factory HID (High-Intensity Discharge) projector headlights or full LED setups. If your Cherokee has HID headlights, the low beam will be a D3S HID bulb, and the high beam function is often handled by a shutter mechanism within the projector, sometimes using an H11 bulb for the high beam if it's a dual-beam projector, or integrated LED for models with full LED headlamps. It's crucial to verify your specific headlight type before purchasing replacement bulbs.

Front fog lights across most trims use an H11 bulb. Daytime Running Lights (DRLs) on the 2018 Cherokee are typically integrated LED strips and are not user-serviceable as individual bulbs.

For signaling, the front turn signals commonly use a WY21W (also known as 7440A) amber halogen bulb, while the rear turn signals utilize a 7440 halogen bulb. The brake lights are 7443 bulbs. Most 2018 Cherokees have LED integrated tail lights, meaning the tail light function is part of an LED assembly and cannot be replaced with a single bulb. The reverse lights are standard 921 halogen bulbs.

Moving to smaller exterior lights, the license plate lights commonly use 168 or W5W halogen bulbs, and front side marker lights also typically use W5W bulbs.

Inside the cabin, the dome and map lights usually take 2825 or W5W bulbs. Note that some premium trims might feature factory LED interior lighting, which would not be easily replaceable with standard bulbs.

LED vs Halogen Upgrade Considerations

Upgrading your 2018 Jeep Cherokee from halogen to LED bulbs can significantly improve light output, modernize the look, and increase bulb longevity. However, there are several factors to consider:

• CANBUS Errors: Modern vehicles like the Cherokee use a CANBUS (Controller Area Network Bus) system to monitor electrical components. Halogen bulbs draw more power than LEDs. When you switch to LEDs, the lower power draw can trigger