2023 Tesla Model Y Bulb Sizes (Headlight, Tail, Fog & Interior)

As an ASE-certified master technician, I see a lot of modern EVs rolling into shops. When it comes to the 2023 Tesla Model Y, traditional automotive lighting rules go out the window. Unlike older internal combustion vehicles that use a mix of halogen, HID, and LED bulbs, the 2023 Model Y is equipped entirely with integrated LED lighting from the factory.

Whether you are looking to replace a damaged housing, upgrade your interior lighting, or just want to understand how your EV’s lighting system works, this guide covers everything you need to know about the 2023 Tesla Model Y bulb sizes and lighting assemblies.

Quick Reference: 2023 Tesla Model Y Bulb Sizes

Note: Because the Model Y uses factory-integrated LED assemblies, traditional bulb sizes (like H11 or 3157) do not apply. If a light fails, the entire housing or module typically must be replaced.

LED vs Halogen Upgrade Considerations

Since the 2023 Tesla Model Y comes entirely equipped with LEDs straight from the factory, there are no "halogen to LED" upgrades to worry about. You won't have to deal with CANBUS error decoders or anti-flicker harnesses for the exterior lights.

However, there is a thriving aftermarket for interior and accessory LED upgrades. Many Model Y owners find the factory trunk, footwell, and puddle lights to be a bit too dim. Aftermarket companies sell plug-and-play LED modules that are significantly brighter. When upgrading these:

• Voltage: Ensure the modules are rated for Tesla's 16V low-voltage architecture (introduced with the AMD Ryzen MCU and Lithium-ion low-voltage battery). Older 12V aftermarket LEDs may burn out quickly or fail to operate.
• Matrix vs. Standard LEDs: Depending on your exact build date and trim (Long Range vs. Performance), your Model Y may have standard reflector LEDs or newer global Matrix LED headlights. These assemblies are not easily interchangeable due to software configurations.

How to Replace Each Bulb (Assembly)

Because there are no twist-and-pull bulbs on the exterior, "replacement" usually means swapping the whole unit.

• Headlights (Low/High/DRL/Turn): If a headlight fails or is damaged in a collision, the front bumper cover must be removed to access the mounting bolts. Once the new assembly is installed, a software redeployment and headlight calibration must be run via the Service Mode in the Tesla center screen.
• Tail Lights / Brake / Rear Turn: Accessed by removing the interior trunk trim. There are a few nuts holding the housing to the body. Be careful with the harness connector.
• Fog Lights: Requires removing or pulling back the front wheel well liner and lower splash shield to access the mounting hardware.
• Puddle/Footwell/Trunk Lights: These are the only truly "DIY-friendly" bulbs on the car. Use a plastic non-marring pry tool to pop the factory LED module out of the door card or trunk liner. Unplug the harness, plug in the upgraded LED module, and snap it back into place.

Common Lighting Issues for this Generation

While LED technology is designed to last the lifetime of the vehicle, the 2023 Tesla Model Y is not immune to lighting issues:

1. Tail Light Condensation: This is incredibly common. While mild condensation that clears up in the sun is considered "normal" by Tesla, heavy water pooling inside the reverse light or main tail light housing is a defect and should be replaced under warranty.
2. Software Glitches: Sometimes, a turn signal or DRL will fail to illuminate not because the LED is dead, but due to a software glitch. Doing a "two-scroll-wheel reboot" on the steering wheel often resolves transient lighting malfunctions.
3. Low Voltage Battery Faults: If the 16V lithium low-voltage system experiences a fault, interior lighting (dome lights, map lights, and ambient lighting) may shut down to conserve energy for critical systems.

If you are dealing with a damaged headlight assembly or a complex electrical issue that a reboot won't fix, it’s best to leave it to the professionals. Find a trusted shop on Repairius.