If one of your rear brake lights isn’t working on a 2010 Forester, you can replace the bulb by accessing the tail-light housing from inside the cargo area, removing the old bulb, and installing a fresh one. The exact bulb type can vary by trim, so check your owner’s manual or the bulb chart inside the cargo area for the correct specification (commonly a dual-filament bulb such as 3157 or 7443).
What you’ll need
Having the right tools and parts on hand will make the replacement quick and clean. Gather these items before you start.
- Replacement brake light bulb (verify the correct type for your 2010 Forester—3157, 7443, or the specific Subaru bulb listed in your manual)
- Clean gloves or a clean microfiber cloth
- Flashlight for better visibility
- Small flathead screwdriver or panel removal tool (if needed to release interior trim)
- Optional: trim clips or screws if your interior cover uses fasteners
With these items, you’ll be prepared to access the rear light assembly and swap in a new bulb.
Step-by-step guide
The following steps walk you through locating the brake light, removing the old bulb, and installing a new one. Take your time to avoid damaging clips or seals.
- Open the rear hatch and locate the back side of the taillight assembly. From the cargo area, you may need to remove a small interior trim panel or access cover to reach the bulb socket.
- If your Forester uses an interior access panel, pry it gently with a trim tool or flathead screwdriver to expose the rear of the taillight. Keep any fasteners in a safe place.
- From the back of the taillight, locate the bulb socket. It will be held in place by a small twist-lock or by a wire connector. If it’s a twist-lock, rotate the socket counterclockwise about a quarter turn and pull it straight out.
- Carefully remove the old bulb from the socket by pulling it straight out. Handle the bulb by the base and avoid touching the glass with your bare fingers (oil from your skin can shorten bulb life).
- Install the new bulb into the socket, ensuring it seats firmly and oriented correctly. If the bulb has a direction notch, align it with the socket.
- Reinsert the socket into the taillight housing and rotate clockwise (or reseat as required) to lock it in place. Ensure the electrical connector is secure.
- Reattach the interior trim panel or access cover and secure any fasteners you removed. Close the hatch and test the brake light.
- Test the brake light by pressing the brake pedal with the ignition on or while the car is in the accessory position. Check both the left and right brake lights if you replaced one side only.
By following these steps, you should have a functioning brake light again. If the light still does not illuminate after replacement, proceed to troubleshooting below.
Troubleshooting: what to do if it still doesn’t light
If the new bulb doesn’t light, there are a few common culprits to check before assuming a defective bulb.
- Check the fuse labeled Brake, Stop, or Tail lights in your vehicle’s fuse box. A blown fuse will disable the brake lights on that circuit.
- Inspect the brake light switch located near the brake pedal. A faulty switch can prevent the lights from triggering when you press the pedal.
- Examine the bulb socket and wiring for corrosion, bent prongs, or damaged insulation that could interrupt the circuit.
- Confirm you installed the correct bulb type for your trim and that the bulb is seated properly in the socket.
- Test with another known-good bulb to rule out a defective replacement.
If you’re uncomfortable with electrical troubleshooting or the issue persists, consult a qualified mechanic or Subaru dealer for a diagnostic check.
Summary
Replacing the brake light bulb on a 2010 Subaru Forester is typically a straightforward job that involves accessing the rear taillight from the cargo area, rotating out the bulb socket, swapping in a new bulb of the correct type, and reseating everything. Always verify the exact bulb specification for your trim, wear gloves to prevent oil on the bulb, and test the lights after reassembly. If the bulb replacement doesn’t solve the problem, check fuses and wiring, or seek professional help to diagnose electrical issues.
Note: This guide covers the general method for the 2010 Forester; exact steps may vary slightly by trim level and regional specifications. Refer to the owner’s manual or bulb chart inside the cargo area for precise bulb type and panel removal instructions.
What is the most common problem with the 2010 Subaru Forester?
Top 2010 Subaru Forester Problems
- Subaru Front O2 Sensor Recall.
- Check Engine Light Due to Failed Catalytic Converter.
- Cooling System Problems Cause Head Gasket Failure.
- Worn Out Gaskets Allowed Oil to Seep Into Spark Plugs.
- Improved Spark Plug Wires for Misfire Issues.
- Check Engine Light Due to Failed Knock Sensor.
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Will O'Reilly change my brake light bulb?
To find replacement brake light bulbs, brake switches, fuses, and connectors, visit O'Reilly Auto Parts. Our Parts People can install your new bulb in most vehicles for free when you purchase a replacement bulb at O'Reilly Auto Parts.
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Is my tail light and brake light the same bulb?
Brake lights and tail lights may appear similar and often use the same bulb, but they serve distinct purposes.
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Can I replace my brake light bulbs myself?
In most cases, you can simply twist the bulb socket slightly counterclockwise to remove. Install the new bulb. Apply a pea-sized drop of dielectric grease to the bulb, then insert into the socket. Re-attach the tail light housing.
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