2022 Jeep Grand Cherokee Bulb Sizes (Headlight, Tail, Fog)

As an ASE-certified master technician, I’ve seen firsthand how the evolution of automotive lighting has changed maintenance routines. The 2022 Jeep Grand Cherokee is a unique model year because it marks the crossover between two generations: the all-new WL generation and the carryover WK generation (sold as the Grand Cherokee WK).

While the new WL generation is almost entirely equipped with non-serviceable LED assemblies from the factory, the WK models and certain base trims still utilize traditional halogen and HID bulbs. If you are looking to replace a burnt-out bulb or upgrade your standard halogens to LEDs, this guide provides the correct bulb sizes and expert tips for your 2022 Jeep Grand Cherokee.

Quick reference

Here is the comprehensive bulb size chart for the 2022 Jeep Grand Cherokee. Note that if your specific trim (like the Summit or Overland) comes with factory LED lighting packages, the bulbs are typically built into the housing and cannot be replaced individually.

LED vs halogen upgrade considerations

If your 2022 Grand Cherokee came equipped with standard halogen H11 low beams and 9005 high beams, upgrading to aftermarket LEDs is a very popular modification. However, modern Jeeps are notorious for having highly sensitive CANBUS (Controller Area Network) systems.

When you install an LED bulb, it draws significantly less power than the factory halogen. The Jeep's computer reads this low power draw as a burnt-out bulb, resulting in rapid flashing (hyper-flashing) for turn signals, dashboard error messages, or even the headlights shutting off completely. To fix this, you must purchase LED bulbs with built-in CANBUS decoders or wire an external load resistor in-line with the new bulbs. Furthermore, ensure that the LED chips mimic the exact placement of the halogen filament; otherwise, the projector housings will scatter the light and blind oncoming drivers instead of focusing the beam correctly.

How to replace each bulb

Low and High Beam Headlights: Replacing the headlight bulbs on the Grand Cherokee can be a tight squeeze. For the passenger side, you may need to remove the airbox lid to gain adequate clearance. For the driver's side, moving the ECU or accessing the bulbs through the wheel well splash shield is often the easiest route. Twist the dust cap counterclockwise, unplug the harness, and twist the bulb out. Do not touch the glass of the new halogen or HID bulb with your bare hands, as oil from your skin will cause premature failure.

Fog Lights: The fog lights are best accessed from underneath the front bumper. Turning the wheels fully to the opposite side of the bulb you are replacing and pulling back the fender liner gives you direct access to the rear of the fog light housing.

Tail, Brake, and Rear Turn Signals: Open the rear liftgate and locate the two push-pins or T30 Torx screws securing the inner edge of the taillight assembly. Remove them, and carefully pull the entire assembly straight back to pop it off its retention grommets. From there, simply twist the bulb sockets counterclockwise to access the 3157 or 7440 bulbs.

Interior Dome and Map Lights: Use a non-marring plastic trim tool to gently pry the clear plastic lenses off the overhead console. Pull the 194 wedge bulbs straight out. If an aftermarket LED bulb doesn't light up upon installation, pull it out, flip it 180 degrees to reverse the polarity, and push it back in.

Common lighting issues for this generation

One of the most frequent issues on the 2022 Grand Cherokee (particularly the WK carryovers) involves moisture intrusion in the rear taillight assemblies. Condensation can build up inside the lens, eventually shorting out the internal LED boards or corroding the halogen bulb sockets. If you notice pooling water, the assembly will likely need to be replaced, or the socket thoroughly cleaned and packed with dielectric grease.

Another common issue for trims equipped with factory D3S HID bulbs is ballast failure. If replacing the HID bulb doesn't fix a dead headlight, the ballast mounted directly under the headlight housing has likely failed and will need to be swapped out.

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