Parts for your 2015 Subaru Legacy-Headlight bulbs

2015 Subaru Legacy (Liberty) headlight bulbs — what they do and how to look after them

Headlight bulbs are absolutely relevant to the 2015 Subaru Legacy (known as Liberty in Australia). Referencing the 2015 Subaru Legacy/Liberty Owner’s Manual and Subaru service information, this model is equipped with replaceable halogen headlight bulbs — typically H11 for low beam (projector) and HB3/9005 for high beam in most markets, including New Zealand and Australia. Subaru’s parts catalogues and workshop manuals for the BN/BS series confirm serviceable bulb types rather than sealed LED units, so headlight bulbs are a standard maintenance item on this vehicle.

On the 2015 Legacy/Liberty, the headlight bulbs do the heavy lifting for safe night driving, wet-weather visibility, and daytime recognition via DRLs (which often use the high beam at reduced power). They’re designed to be bright, reliable, and easy to replace when they age or fail. Over time, halogen bulbs dim, change colour, and can cause patchy beam patterns — even before they blow — so timely replacement keeps the car safe and legal.

For servicing, it’s smart to replace bulbs in pairs to maintain a matched colour and brightness across the front end. During routine checks, look for:

• Dimming or yellowed light compared with new
• Intermittent operation from vibration or a loose connector
• Cloudy or damaged headlamp lenses that scatter light

Common bulb spec on 2015 Legacy/Liberty:

• Low beam: H11 (projector housing)
• High beam: HB3/9005

When replacing, avoid touching the glass, oils from fingers create hot spots that shorten bulb life. Use quality, ADR/NZTA-compliant bulbs and check fuses and connectors if a new bulb doesn’t light. After any bulb change, verify headlight aim — a quick alignment check prevents dazzling other drivers and improves down-road reach.

DIY access is typically from behind the headlamp through the engine bay with the bonnet up. Space can be tight on one side, turning the steering for more room or temporarily moving the intake snorkel can help. If a previous owner fitted non-standard LEDs or HIDs, ensure they’re road legal and properly focused, many retrofits can scatter light and fail WOF/regos. Stick with the correct base types (H11, HB3) and the vehicle will deliver the crisp, even beam its projector optics were designed for.

A quick annual lighting check — along with a fresh pair of bulbs every few years if night driving is frequent — keeps the 2015 Legacy/Liberty shining bright across Aussie and Kiwi roads.

Popular questions about 2015 Subaru Legacy headlight bulbs

What bulb sizes does a 2015 Legacy/Liberty use?
Most models use H11 for low beam and HB3/9005 for high beam. Always confirm against the owner’s manual or the label behind the headlamp, as market trims can vary slightly.

Do the headlights need bumper removal to change bulbs?
No. Bulbs are generally accessible from the rear of the headlamp under the bonnet. It can be snug on one side, shifting the intake snorkel or washer filler neck gently may improve access.

Is it worth upgrading to brighter bulbs?
A premium halogen that’s ADR/NZTA-compliant can sharpen output without upsetting the beam pattern. Avoid cheap LED/HID retrofits in halogen projectors — many glare and aren’t WOF/rego friendly.