What Size Bulbs Does a 2018 Jeep Cherokee Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Moderate (Dust covers often present)
Est. Replacement Cost
$50 - $150 (HID System)
What Lighting System Does the 2018 Jeep Cherokee Have?
The 2018 Jeep Cherokee features an extensive lighting system with 11 bulb positions. It uses factory HID/Xenon technology with D3S projector headlights. The Cherokee has been available from 1983 to 2019, and the 2018 model falls in the late-generation years. As a Jeep vehicle, it uses a CANbus electrical system that monitors bulb status.
LED Flicker Warning
This vehicle (Jeep) is known to use a CANbus system that checks for burnt-out bulbs. Installing standard LEDs may cause them to flicker or trigger a dashboard error.
We highly recommend using a CANbus decoder or "Anti-Flicker" resistors.
Can You Put LED Bulbs in a 2018 Jeep Cherokee?
The 2018 Jeep Cherokee comes equipped with factory D3S HID/Xenon headlights. These already produce significantly more light than halogen bulbs, so upgrading is generally unnecessary. When your HID bulbs burn out, replace them with OEM-spec D3S HID bulbs to maintain the correct color temperature and beam pattern. Avoid cheap aftermarket HID bulbs as they can produce incorrect beam patterns and blind oncoming drivers. Your fog lights use a PSX24W LED halogen bulb, which can be upgraded to LED for a whiter color match with your HID headlights.
How to Replace Bulbs on a 2018 Jeep Cherokee
To remove the headlight bulb, disconnect the wiring harness, then twist the bulb counter-clockwise and pull it straight out of the housing. On the 2018 Cherokee, you will likely encounter rubber dust covers behind the headlight housing. These pull off by hand or unscrew depending on the design. Allow about 15 to 20 minutes per side. HID headlights operate at high voltage. Always disconnect the battery before working on the headlight assembly. Never touch the HID ballast while the headlights are on, and handle the D3S capsule with gloves to avoid oil contamination. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the PSX24W LED fog light socket.
Full Upgrade Bundle
Upgrade All 12 Positions at Once
2018 Jeep Cherokee Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | HID-D3S LED | Buy HID-D3S LED |
High Beam | HID-D3S LED | Buy HID-D3S LED |
Fog Light | PSX24W LED | Buy PSX24W LED |
Brake Light | High Mount Brake Light Assembly | Buy High Mount Brake Light Assembly |
Side Marker | 194 | Buy 194 |
Turn Signal Front | 7440 or 7440NA | Buy 7440 or 7440NA |
License Plate | 194 or 12961 | Buy 194 or 12961 |
Map Light | 211-2 or 578 | Buy 211-2 or 578 |
Parking Light | N/A | Buy N/A |
Turn Signal Rear | 7440 or 7440NA | Buy 7440 or 7440NA |
Reverse Light | 921 | Buy 921 |
Trunk Light | 211-2 or 578 | Buy 211-2 or 578 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2018 Jeep CherokeeHow Long Do 2018 Jeep Cherokee Headlight Bulbs Last?
HID/Xenon headlights on the 2018 Jeep Cherokee typically last 2,000 to 3,000 hours, or about 4 to 6 years of regular driving. As HID bulbs age, they shift color toward pink or purple, which is a clear sign that replacement is needed. Flickering on startup also indicates a worn bulb or failing ballast. At 8 years old, the original bulbs on your Cherokee are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.
What Bulbs Are Compatible with the 2018 Jeep Cherokee?
Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.
2018 Jeep Cherokee Headlight FAQ
Did Jeep Cherokee Bulb Sizes Change Over the Years?
Over its production run from 1983 to 2019, the Jeep Cherokee has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 2018 model uses the newer bulb specification introduced around 2017. Always verify the exact bulb size for your specific 2018 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other Cherokee Years
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Other Vehicles That Use HID-D3S LED Bulbs
These vehicles from other makes also use a HID-D3S LED low beam bulb: