2020 Subaru Crosstrek Bulb Sizes: A Master Technician's Reference Guide

As an ASE-certified master technician, I’ve seen countless Subaru Crosstreks roll into the shop for routine lighting maintenance. The 2020 Subaru Crosstrek is a fantastic, versatile crossover, but like any vehicle, its bulbs eventually burn out. Knowing the exact bulb sizes for your Crosstrek ensures you buy the right parts the first time, whether you are replacing a burnt-out halogen or upgrading to aftermarket LEDs.

Subaru offered the 2020 Crosstrek with two main lighting setups: standard halogen housings (found on Base and Premium trims) and factory LED steering-responsive headlights (standard on the Limited trim, optional on others). If your Crosstrek came with factory LEDs, the headlight assemblies are sealed units, meaning you cannot replace individual bulbs; the entire assembly must be serviced or replaced if it fails.

Below is the definitive bulb size guide for the 2020 Subaru Crosstrek equipped with standard halogen housings.

Quick reference: 2020 Subaru Crosstrek Bulb Sizes

Note: Always verify your specific trim level before purchasing. Limited models feature sealed LED assemblies for the headlights, brake, and tail lights.

LED vs halogen upgrade considerations

Upgrading your 2020 Crosstrek’s halogen bulbs to LEDs is a popular modification, improving both nighttime visibility and the vehicle's modern aesthetic. However, there are a few technical considerations to keep in mind:

• CANBUS Errors and Hyperblinking: The Crosstrek’s electrical system monitors bulb resistance. Upgrading your turn signals (7440NA) to LED will cause "hyperblinking" (rapid flashing) because LEDs draw significantly less power. You will need to install inline load resistors or purchase premium LED bulbs with built-in CANBUS anti-flicker technology.
• DRL Compatibility: The 2020 Crosstrek uses the 9005 high beam bulb as the Daytime Running Light by running it at a lower voltage. Many aftermarket LED bulbs cannot operate at this lower voltage, resulting in flickering DRLs or high beams that operate at full brightness at all times. Look for LEDs specifically rated for DRL compatibility.
• Beam Pattern: When upgrading low beams (H11), ensure you purchase LEDs that mimic the halogen filament's exact placement. Poorly designed LEDs will scatter light in the Crosstrek's projector housings, blinding oncoming drivers and reducing your usable visibility.

How to replace each bulb

• Low Beam (H11) and High Beam (9005): These are easily accessible from under the hood. Simply twist the bulb counterclockwise, pull it out, unclip the wiring harness, and install the new bulb. Avoid touching the glass of the new halogen bulb with bare skin, as finger oils can cause premature failure.
• Fog Lights (H16/H11): Accessing these requires turning the steering wheel to one side, removing a few push-pins from the inner fender liner, and pulling the liner back. Reach in, disconnect the harness, and twist the bulb out.
• Front Turn Signals (7440NA): Located in the main headlight assembly, these are also accessed from under the hood, similar to the headlights.
• Rear Turn, Brake, and Reverse Lights: Open the rear hatch and remove the two 10mm bolts securing the tail light housing. Carefully pull the housing straight back away from the vehicle to expose the bulb sockets. Twist the respective socket counterclockwise to access the bulb.
• License Plate (194): Use a small flathead screwdriver to carefully pry off the clear plastic lens covers on the rear hatch above the license plate. Pull the old bulb straight out.
• Interior Lights (194 / DE3175): Use a plastic trim removal tool to gently pry the map and dome light lenses off. Pop the bulbs out and replace them.

Common lighting issues for this generation

The 2020 Subaru Crosstrek is relatively new, so massive electrical failures are rare. However, the most common issue we see in the shop involves the DRL/High beam circuit when owners attempt cheap LED upgrades, resulting in persistent flickering. Another minor issue is moisture buildup in the halogen fog light housings, which can cause bulbs to blow prematurely. If you notice condensation inside the fog light, inspect the housing for cracks and ensure the bulb's rubber O-ring is seated properly.

If you are dealing with persistent electrical gremlins, blown fuses, or just don't feel comfortable disassembling your vehicle's housings, don't risk damaging your crossover. Find a trusted shop on Repairius.