1985-1986 Subaru Loyale Headlight Assembly: Composite vs. Sealed Beam Explained

The Critical Difference: Composite vs. Sealed-Beam Headlights

For the 1985-1986 Subaru Loyale, also sold as the GL, DL, or Leone, Subaru offered two distinct types of headlight assemblies: composite and sealed beam. These two styles are not directly interchangeable, and it's crucial to identify which type your vehicle has before purchasing a replacement.

• Composite Headlights: These are the more modern-style assemblies, typically found on higher trim levels like the GL sedan and wagon. They consist of a plastic or glass lens integrated into a housing with a replaceable halogen bulb inside. The entire assembly has a more aerodynamic, form-fitting look that is flush with the vehicle's body panels. If you can change just the bulb from the back of the headlight unit, you have composite headlights.
• Sealed-Beam Headlights: This older style was common on base models like the DL. The bulb, reflector, and lens are all manufactured as a single, sealed unit. When the filament burns out, the entire rectangular glass unit must be replaced. 🎬 Watch: How to replace a sealed-beam headlight These headlights often appear more recessed into the front of the car compared to the flush-mounted composite style.

Symptoms of a Failing Headlight Assembly

Beyond a simple burnt-out bulb, the entire assembly can fail. Here are the common signs:

• Dim or Yellowed Lens: The plastic lenses on composite headlights are exposed to UV rays and road debris. Over time, they can become hazy, yellow, and cloudy, which significantly reduces light output and can be a safety hazard.
🎬 See this guide on restoring faded headlight lenses
• Moisture or Condensation Inside: A failing seal or a crack in the housing can allow water to enter the assembly. This moisture can cause the reflective chrome surface to peel, short out electrical connections, and cause bulbs to burn out prematurely.
• Flickering or Intermittent Operation: While often a bulb or wiring issue, a corroded internal connector within the assembly can cause the headlight to flicker or work intermittently.
• Physical Damage: Cracks in the lens or housing, and broken mounting tabs, are common results of minor front-end impacts. Broken tabs will prevent the headlight from being aimed correctly and can cause it to vibrate while driving.

Buying a Used 1985-1986 Loyale Headlight Assembly

Purchasing a used OEM headlight is often the best choice for fit and quality, but careful inspection is key. Here’s what to look for:

1. Verify the Type: First and foremost, confirm you are buying the correct style (composite or sealed-beam) for your car. Ask the seller for clear photos showing the front and back of the unit.
2. Check All Mounting Tabs: This is the most critical inspection point. These plastic tabs are brittle after decades of heat and vibration and are easily broken during removal. A headlight with even one broken tab will be difficult to secure and aim properly.
3. Inspect the Lens (Composite): Look for deep pitting, stress cracks, and severe yellowing or hazing. While minor hazing can sometimes be polished out, a heavily damaged lens is permanent.
4. Examine the Reflector Bowl: The chrome inside the housing should be bright and shiny. Any signs of peeling, discoloration, or water marks indicate the seal has failed and the assembly's performance will be poor.
5. Check the Wiring and Connectors: Look for any cut wires or corroded electrical connector pins on the back of the assembly. Repairs can be difficult and unreliable.

Known Issues, TSBs, and Recalls

For vehicles of this age, official documentation is scarce. Searches for NHTSA recalls specific to the 1985-1986 Subaru Loyale headlight assembly did not yield any results. The most common reported issues in forums and owner communities relate to the natural aging of the components, such as:

• Lens Hazing: The polycarbonate lenses on composite units are prone to oxidation from sun exposure.
• Brittle Adjusters: The plastic screws used for aiming the headlights can become brittle and break, making alignment impossible.
• Wiring Issues: Some Subaru models from later years were known for having lighting systems wired in series, where one burnt-out bulb could affect others in the circuit. While not confirmed specifically for the '85-'86 Loyale, it highlights the importance of checking all related bulbs if you experience a widespread outage.

Replacement & Alignment Overview

Replacing the headlight assembly on a 1985-1986 Loyale is generally straightforward for a DIY mechanic.

1. Access the Assembly: You will typically need to remove the front grille and sometimes the corner marker light to access the headlight's mounting bolts.
2. Remove Fasteners: Unbolt the assembly from the radiator core support. Be gentle, as the surrounding plastic can be brittle.
3. Disconnect Wiring: Unplug the main electrical connector from the back of the assembly.
4. Install New Assembly: Bolt the new assembly in place, reconnect the wiring, and reinstall the grille and any other removed trim.

Aiming is Required: After installation, you MUST align the headlights. Misaligned headlights can blind oncoming drivers or fail to illuminate the road properly. This is done by turning the adjustment screws on the back of the assembly. Park the car on a level surface facing a wall or garage door from about 25 feet away and adjust the beams so the cutoff line is at the specified height, following standard headlight aiming procedures.

Cost Comparison

Frequently Asked Questions