Parts for your 2011 Subaru Forester-Headlight bulbs

2011 Subaru Forester headlight bulbs — what they do and how to look after them

Headlight bulbs are absolutely relevant to the 2011 Subaru Forester. Technical references including the 2011 Forester Owner’s Manual (SH series) and Subaru genuine parts catalogues specify replaceable halogen bulbs for the headlamps — typically H11 for low beam and HB3/9005 for high beam on most trims. Some market variants may have factory HID/Xenon low-beam capsules. So, the Forester isn’t using sealed lamps, it runs serviceable bulbs that are designed to be replaced as they age or fail.

On the road, those headlight bulbs do more than light the way — they keep the Forester visible to others and compliant with rego and WOF checks. Halogen H11 lows handle everyday night driving, while the HB3/9005 highs throw extra distance on country roads. If fitted with factory HID/Xenon, the low-beam capsule delivers a brighter, whiter light with stable output over time.

As part of regular servicing, it’s smart to check beam performance and lens clarity. Dimming, yellowing, or one side looking weaker are classic signs the bulbs are getting tired. Halogens generally fade over 2–4 years of use, so pre-emptive replacement keeps the light output balanced. Always replace bulbs in pairs for even colour and brightness, and avoid touching the glass — skin oils create hot spots that shorten life. Use gloves or a clean tissue.

Access on the 2011 Forester is via the engine bay behind the headlamp. Disconnect the connector, twist the bulb anticlockwise, and withdraw. Seat the new bulb carefully, align the tabs, and lock it in. For HID-equipped cars, don’t DIY: the system runs high voltage — get a licensed auto sparky or technician to handle it. After any bulb change, check headlight aim, a quick adjustment prevents glare and keeps the beam on the road where it belongs.

Stick with ADR/UNECE-compliant bulbs in the correct wattage (commonly 55 W for H11 and 60 W for HB3/9005). Over-watt or questionable LED retrofits can overheat wiring, ruin beam pattern, and may not pass inspection. Keep the lenses clean, inspect the headlight fuses and connectors for heat discolouration, and you’ll have bright, reliable lights for night drives and winter commutes.

• Know your types: H11 low beam, HB3/9005 high beam (most models), factory HID uses the specified Xenon capsule — check the owner’s manual.
• Replace in pairs, don’t touch the glass, and confirm aim after fitting.
• Choose quality, road-legal bulbs, avoid high-watt or non-compliant retrofits.

Popular questions

What bulb sizes does a 2011 Subaru Forester use?
Most 2011 Forester (SH) models use H11 for the low beam and HB3/9005 for the high beam, as listed in Subaru owner and parts manuals. Some variants may have factory HID/Xenon for the low beam, those use a specific Xenon capsule specified for the vehicle. If unsure, check the owner’s manual or the markings on the headlamp housing.

How often should headlight bulbs be replaced?
Halogen bulbs usually fade over 2–4 years of normal driving. If the lights look dim or mismatched, or if you do lots of night kilometres, replace both sides together for an even beam. HID/Xenon capsules last longer but should also be replaced in pairs when output drops or colour shifts.

Can I upgrade to LED bulbs?
Only if the LED kit is specifically approved and compliant for on-road use in your market and provides a correct beam pattern in the Forester’s housings. Many drop-in LEDs are not road-legal and can cause glare or fail inspections. When in doubt, choose premium halogen or OEM-spec HID for safe, legal performance.