2016 Jeep Grand Cherokee Bulb Sizes (Headlight, Tail, Fog)

Quick reference

The 2016 Jeep Grand Cherokee offers a range of lighting options that can vary significantly based on trim level and optional packages. While many trims come standard with halogen bulbs, premium trims or optional lighting groups often feature High-Intensity Discharge (HID) headlights, and some tail light functions are handled by integrated LED arrays.

For halogen-equipped models, the low beams primarily utilize H11 bulbs, and high beams use 9005 bulbs. Vehicles with the upgraded HID (often referred to as Xenon) headlights will have D3S bulbs for the low beam. In these Bi-Xenon setups, the high beam function is typically handled by a shutter mechanism within the projector, but some configurations might still use an H9 for an auxiliary high beam.

The fog lights on all trims commonly use a 2504 or H16 bulb. Day Time Running Lights (DRLs) and front turn signals generally share the WY21W incandescent bulb. Rear turn signals are usually a 7440A, and brake lights are a 7440.

It's important to note that the tail lights on the 2016 Grand Cherokee are largely integrated LED units for the main tail light function and some rear side markers. These are generally not user-serviceable and would require replacing the entire tail light assembly if a failure occurs. Reverse lights, however, use a standard 921 incandescent bulb. License plate lights and front side markers both typically use the compact 194 bulb. Interior lighting usually consists of 578 festoon bulbs for the dome light and 194 wedge bulbs for the map lights.

Be sure to check your specific vehicle's owner's manual or visually inspect the existing bulbs to confirm the exact size and type before purchasing replacements, especially if you suspect your model may have unique lighting options.

LED vs halogen upgrade considerations

Upgrading from standard halogen bulbs to LED alternatives can significantly improve brightness, longevity, and give your 2016 Jeep Grand Cherokee a more modern look. However, there are several important considerations to keep in mind to ensure a smooth transition.

CANBUS Errors: Modern vehicles like the 2016 Grand Cherokee use a CANBUS (Controller Area Network Bus) system to monitor various electrical components, including lighting. Halogen bulbs draw more power than LEDs. When you replace a halogen bulb with an LED, the lower power draw can trick the CANBUS system into thinking the bulb is out, leading to "bulb out" warning messages on your dashboard. To avoid these errors, you'll need to use "CANBUS-compatible" LEDs or install load resistors. Load resistors mimic the power draw of a halogen bulb, preventing the CANBUS system from triggering an error.

Adapters Needed: While many LED bulbs are designed to be plug-and-play replacements, some may require specific adapters to fit correctly into the housing or to connect to the wiring harness. This is particularly true for headlight conversions, where the often-larger heat sinks on LED bulbs might interfere with dust caps or require modifications to the housing. Always verify the physical dimensions of the LED bulb against your vehicle's housing and check if any additional adapters are necessary for a secure fit and proper seal.

Beam Pattern and Glare: When upgrading headlights and fog lights to LED, it's crucial to ensure the new bulbs provide a proper beam pattern. Poorly designed or installed LED bulbs in a housing designed for halogens can scatter light excessively, leading to glare for oncoming drivers and a less effective light output for you. Look for LED bulbs that are specifically designed to mimic the filament placement of their halogen counterparts to maintain an optimal beam pattern. Adjusting the headlight aim after installation may also be necessary.

Heat Dissipation: LEDs generate heat, but unlike halogens which radiate heat forward, LEDs generate heat at their base. Effective heat dissipation is vital for LED longevity. Quality LED bulbs will incorporate robust heat sinks (often finned aluminum or with integrated fans) to manage this. Ensure there