Parts for your 2011 Subaru Impreza-Exterior bulbs

2011 Subaru Impreza Exterior Bulbs: Purpose, Fitment, and Service Tips

Exterior bulbs are absolutely fitted to, and relevant for, the 2011 Subaru Impreza. Subaru’s 2011 Impreza Owner’s Manual (Lighting section) and the factory service manual for the GE/GH/GR platform list replaceable bulbs for headlamps, indicators, stop/tail, reverse, number plate and fog lamps. These documents, along with Subaru parts catalogues for MY2011, confirm the vehicle uses serviceable halogen and wedge-style bulbs across its exterior lighting. Certain variants (e.g., WRX/STI in some markets) may feature HID low beams, also documented in the service literature.

On this model, exterior bulbs do the heavy lifting for safety and compliance—helping the driver see and be seen, signalling intent to other road users, and keeping the car onside with WOF/RWC checks. From night-time visibility to clear turn signalling in wet or low-light conditions, the Impreza’s exterior bulbs are small parts with big jobs.

Typical lamp positions on a 2011 Impreza include:

• Headlights (low/high beam) and front fog lights
• Front and rear indicators, side repeaters/markers
• Tail, brake, and high-mount stop lights
• Reverse lights and number plate lights
• Position/parking lights

Bulb types vary by trim and market. Many AU/NZ 2011 Imprezas use halogen low beams (often H11) and high beams (commonly HB3/9005), with wedge bulbs (e.g., T10/W5W and 7443/7440 families) around the rear, markers, and plate lights. Always confirm against the Owner’s Manual or Subaru parts data for the exact VIN.

As part of regular servicing, a quick lighting check every 10,000 km or six months is smart. Replace bulbs in pairs for consistent brightness and beam colour. Avoid touching the glass—use gloves or a clean tissue—to prevent hot spots that shorten life. If a bulb fails early, check the relevant fuse, inspect for moisture inside the housing, and make sure the connector isn’t heat-damaged. Keep lenses clean and ensure headlight aim is correct after any bulb or housing work.

Considering an upgrade? Quality “road-legal” halogen upgrades can improve light without upsetting the beam pattern. LED conversions may trigger warnings or dazzle if not designed for halogen optics—check ADR/NZTA rules and choose kits that are compliant and well-focused. For HID-equipped variants, follow service manual procedures and safety precautions, as high-voltage components are involved.

Handy tip: carry a couple of common spares (e.g., a pair of low-beam and a couple of T10s) if you drive long distances or after dark. It’s a quick, cheap way to stay safe and legal.

Popular questions

What bulb sizes fit a 2011 Subaru Impreza?
Most AU/NZ cars in this year use halogen low beams (often H11) and high beams (commonly HB3/9005), with T10/W5W for small position/plate lamps and 7443/7440 for many rear functions. Variants and trims differ, so it’s best to confirm with the Owner’s Manual or a Subaru parts lookup using the VIN.

If the car has factory HID low beams (some WRX/STI), the capsule type and service method differ—follow the service manual and safety steps.

Why do my exterior bulbs keep blowing?
Frequent failures usually trace back to vibration, cheap bulbs, fingerprints on the glass, moisture in the housing, or charging system voltage that’s a touch high. Fit quality bulbs, keep hands off the glass, check seals and vents for leaks, and have the battery/alternator voltage checked.

If a single position keeps failing, inspect the connector for heat damage and make sure the bulb is the correct wattage.

Can I upgrade to LED on my 2011 Impreza?
It’s possible, but choose carefully. Many drop-in LEDs don’t suit halogen reflectors or projectors, causing glare or poor focus. Check ADR/NZTA compliance, pick reputable products designed for road use, and verify beam pattern and aim after fitting.

For interior or non-headlight exterior lamps (e.g., plate or parkers), quality LEDs can work well. For headlights, compliant halogen upgrades are often the safest bet unless switching to an approved LED/HID system.