2020 Tesla Model X Bulb Size Chart: Headlight, Tail, Fog & Interior

As an ASE-certified master technician, I’ve worked on a vast array of vehicles, from classic muscle cars to the latest electric vehicles. When it comes to the 2020 Tesla Model X, the lighting system is a major departure from traditional internal combustion engine (ICE) vehicles. Tesla engineered the Model X to be highly efficient and technologically advanced, which means you won't find old-school halogen bulbs or standard HID projectors on this vehicle.

If you're looking for replacement bulb sizes for your 2020 Tesla Model X, you need to know upfront: virtually every light on this vehicle is a non-serviceable factory LED assembly. There are no individual bulbs to twist out and replace. If a light fails, the entire housing must be swapped.

Below is the bulb size and type breakdown for the 2020 Model X.

Quick reference

Note: All trims of the 2020 Tesla Model X (Long Range, Performance, etc.) feature standard full-LED lighting. There are no halogen or HID variants for this model year.

LED vs halogen upgrade considerations

Usually, this section is dedicated to the intricacies of upgrading standard halogen bulbs to aftermarket LEDs, covering things like CANBUS errors, anti-flicker modules, and projector housing compatibility. However, because the 2020 Model X comes standard with full LED lighting integrated into sealed control units, traditional upgrades do not apply.

If you are looking to customize your lighting (such as installing aftermarket tinted tail lights, illuminated Tesla "T" emblems, or upgraded interior ambient lighting kits), you must ensure the aftermarket accessories are specifically designed for the Model X's electrical architecture. The vehicle relies heavily on a centralized computer system that actively monitors voltage and resistance. Splicing into factory wires without proper CANBUS-compliant modules will trigger software alerts, disable lighting circuits, or even cause a failure in the Body Control Module (BCM). Always use plug-and-play adapter harnesses when adding custom lighting to a Tesla.

How to replace each bulb

Because you are dealing with sealed LED housings rather than individual bulbs, "replacement" means swapping the entire fixture. Here are some quick tips for tackling these jobs:

• Headlights (Low, High, DRL, Front Turn): To replace a headlight assembly on a Model X, you must remove the front aero shield, disconnect the frunk tub, and remove the entire front bumper cover. This is labor-intensive and requires recalibration of the headlights via the MCU (Media Control Unit) service mode once the new housing is installed.
• Fog Lights: These are also accessed by removing the front bumper or partially removing the front wheel well liners and under-trays.
• Tail Lights, Brake, and Rear Turn Signals: The outer tail lights are bolted into the rear quarter panels and can be accessed by pulling back the trunk side-trim lining. The inner tail lights require removing the trim panels on the rear liftgate.
• Reverse Lights and License Plate Lights: Integrated into the rear liftgate or lower fascia depending on the specific component.
• Side Markers: The side markers are integrated into the front fender camera modules. Replacing these requires careful prying to avoid damaging the fender paint, disconnecting the wiring harness, and ensuring the new camera/marker is calibrated through the vehicle's software.
• Interior Dome/Map Lights: The interior LEDs are soldered onto small circuit boards snapped into the headliner and trim. If one fails, you must pry out the entire plastic fixture and plug in a new OEM assembly.

Common lighting issues for this generation

While LEDs boast a lifespan of up to 50,000 hours, the assemblies themselves are not immune to failure. Here are the most common lighting issues we see in the shop for the 2020 Model X:

1. DRL "Yellowing" or Burnout: Similar to the Model S, some Model X vehicles experience a failure of the LED daytime running light tube inside the headlight housing. The crisp white light turns yellow or burns out completely. The only fix is replacing the entire $1,000+ headlight assembly.
2. Tail Light Condensation: Moisture ingress is a known issue with Tesla tail lights. While a light mist that clears up in the sun is considered "normal" by the manufacturer, heavy water pooling inside the red lens requires a full assembly replacement to prevent electrical shorts.
3. Firmware Glitches: Occasionally, a headlight or tail light may stop functioning due to a software glitch rather than a hardware failure. Always try performing a "two-scroll-wheel reboot" on your steering wheel or wait for an over-the-air (OTA) update before assuming the light assembly is dead.

If you are dealing with burnt-out DRLs, heavy condensation, or body panel removal that you aren't comfortable with, leave it to the professionals. Find a trusted shop on Repairius.