2021-26 Model 3 & 2020-26 Model Y Headlights: Decoding Matrix, Projector, and Highland Versions

Variant Differences: The Most Common Point of Confusion

One of the most critical challenges when replacing a headlight on a 2021-2026 Model 3 or a 2020-2026 Model Y is identifying the exact type your vehicle is equipped with. Tesla used several non-interchangeable versions during these model years. Installing the wrong type can lead to error messages, disabled features, or a complete failure to operate.

How to Visually Identify Your Headlight

Before purchasing a replacement, you must visually inspect your vehicle's current headlights. The key difference is the presence of a specific lens for the Matrix version.

• Standard LED Projector: This headlight has a main projector lens for the low and high beams. It was common on earlier models in this year range.
• Matrix LED ('Global' Headlight): The Matrix-capable headlight is identifiable by a distinct, separate circular projector lens located to the side of the main beam projector. This lens allows for advanced adaptive beam functions, although the full functionality depends on the vehicle's software and regional regulations. Tesla began phasing these in around 2021.

Incompatible Headlight Types to Be Aware Of

• Pre-2021 Reflector Style (Model 3 Only): 2017-2020 Model 3s used an older headlight with a chrome reflector bowl design. The parts in this guide will NOT fit these earlier vehicles.
• 'Highland' Style (2024+ Model 3 Only): The refreshed 2024+ Tesla Model 3, known as 'Highland', features a completely new, slimmer headlight design. These are NOT backward compatible with pre-refresh Model 3 or any Model Y vehicles.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

While generally reliable, these headlight assemblies are not without their problems. Most issues are related to moisture, individual LED failures, or software glitches.

Headlight Condensation or Moisture

A common complaint is the appearance of fog or condensation inside the lens. Tesla considers minor fogging that appears and disappears with weather changes to be normal, as the housings are vented. However, if you see large water droplets, running streaks, or a puddle of water inside the housing, the headlight's seal has failed. 🎬 Watch this walkthrough on diagnosing and fixing headlight water condensation. This water ingress can short out the internal electronics and LED driver, leading to a complete failure.

Daytime Running Light (DRL) or High Beam Failure

Owners have reported specific functions failing while others continue to work, such as the main low beam working but the DRL accent strip or high beam failing. Because the LEDs and drivers are integrated, this usually requires the replacement of the entire headlight assembly. In some cases, the external LED driver module (ballast) can be the point of failure and can be replaced separately.

Recalls and Software Updates

As of early 2026, there have been no major NHTSA recalls specifically for headlight hardware failure on these models. However, several recalls have been issued for firmware that affects lighting.

• NHTSA Recall 22V-844: Addressed a firmware anomaly that could cause taillights to intermittently fail to illuminate on some 2023 Model 3 and 2020-2023 Model Y vehicles. This was fixed with an over-the-air (OTA) software update.
• Other recalls like 23V-838 (Autosteer) and 24V-00-003 (Warning Light Font Size) were also resolved via OTA updates and did not directly relate to headlight hardware failure.

Buying a Used Headlight Assembly: A Buyer's Guide

Purchasing a used OEM headlight is a great way to save money, but careful inspection is crucial. Due to the complex software integration, a used original part is often a safer choice than a new aftermarket one, which may cause error codes or compatibility problems.

What to Inspect

• Verify the Type: First and foremost, confirm if it's a standard projector or a Matrix version by looking for the side projector lens. Match it to your existing, working headlight.
• Lens Condition: Check for deep scratches, rock chips, or internal hazing. The outer surface can often be polished, but internal damage or UV crazing cannot be fixed.
• Housing Integrity: Inspect the black plastic housing on the back for any cracks or signs of repair. A cracked housing is a sign of a major impact and means the seals are likely compromised.
• Mounting Tabs: This is a critical inspection point. Carefully check that all mounting tabs are intact and not cracked or repaired. Broken tabs are a common result of minor accidents or improper removal and will prevent the headlight from being installed securely.
• Seals and Water Damage: Look for a 'water line' or mineral deposits inside the lens, which indicates it has had water sitting in it. Avoid any unit with signs of moisture intrusion.

Replacement and Calibration

Replacing the headlight assembly is a moderately difficult job that is feasible for a skilled DIYer. The process requires removing the front bumper cover 🎬 Watch this video for a step-by-step bumper removal guide. to access the headlight bolts.

Software Reinstall is Mandatory

After the new headlight is physically installed and connected, it will likely not work correctly until it is registered with the vehicle. You must put the car into 'Service Mode' through the center touchscreen and perform a 'Software Reinstall'. 🎬 See how to perform a software reinstall in Service Mode. This action forces the car to scan for new hardware and configure the replacement headlight. Skipping this step is a common reason for reported failures after a DIY replacement.

Headlight Aiming and Adjustment

After installation, the headlight beam must be properly aimed to ensure correct visibility and avoid blinding other drivers. This is also done through the 'Service' menu on the touchscreen. The menu provides an interface to adjust the headlight height using the steering wheel scroll wheels while the car is parked in front of a flat wall. Tesla provides specific procedures for aiming the headlights at a certain distance from a wall to achieve the correct beam pattern.

Frequently Asked Questions (FAQ)