Subaru Legacy Brake Light Switch Guide (1990-2005)
A failing brake light switch can cause more than just dark tail lights; it can prevent you from shifting out of park or using cruise control.
- A faulty brake light switch can mimic other, more serious problems like a bad transmission shifter.
- This is an easy and inexpensive DIY repair; the part is located above the brake pedal and can be replaced in under 30 minutes.
- Proper adjustment of the new switch is essential for correct brake light and cruise control operation.
- Ensure you buy the correct switch for your Legacy's trim (with or without cruise control/turbo).
Is Your Subaru Legacy's Brake Light Switch Failing?
A faulty brake light switch is a common issue, but the symptoms can be confusing. You might think you have a major transmission or electrical problem when it's really just this inexpensive switch. Knowing the signs can save you time and money.
🎬 Watch: Learn more about bad brake light switch symptoms and costs.Common Failure Symptoms:
- Brake Lights Don't Work: The most obvious and dangerous symptom. Your brake lights may fail completely or only work some of the time.
- Brake Lights Stay On: The switch can fail in the 'on' position, leaving your brake lights illuminated and draining your battery.
- Can't Shift Out of Park: Your Legacy requires a signal from the brake switch to allow the shifter to move out of Park. If the switch is bad, your shifter will be stuck.
- Cruise Control Issues: If the switch is faulty, your cruise control may not engage or might shut off unexpectedly while driving.
- ABS/VDC Warning Lights: A bad switch can send an incorrect signal, sometimes causing the Anti-lock Brake System (ABS) or Vehicle Dynamics Control (VDC) warning light to come on.
Recall Notice for Other Subaru Models
You may have heard of a large recall (WUE-90) for Subaru brake light switches. It's important to know that this recall does not apply to the 1990-2005 Subaru Legacy. The recall was for newer models where silicone gas from cleaning products could contaminate the switch. Failures on the 1990-2005 Legacy are typically due to normal wear and tear.
Choosing the Right Aftermarket Brake Light Switch
When replacing the switch, you have options. While OEM is available, quality aftermarket parts offer a reliable and cost-effective solution. Not all aftermarket brands are the same, however.
Tier 1: OEM-Equivalent Quality
- Beck Arnley: This brand has a strong reputation for sourcing parts directly from the original manufacturers for Japanese vehicles. Often, the part in a Beck Arnley box is the same as the genuine Subaru part.
- Standard Ignition (Standard Motor Products): A long-standing, trusted name in automotive electrical components. They are known for producing reliable switches that meet or exceed OEM specifications.
Tier 2: Value-Oriented Brands
- Dorman: Dorman offers a wide range of parts and is a popular choice. However, community feedback on their electrical components can be mixed. It can be a budget-friendly option, but may not have the same longevity as a Tier 1 brand.
- Facet, Holstein, True Tech: These brands provide functional, cost-effective alternatives. They are a good choice if the budget is the primary concern, but check the warranty period.
Pro Tip: There are different part numbers for Legacys with and without cruise control or a turbo. Double-check that the switch you order is correct for your specific model to ensure all features work properly.
Cost of Replacing a Brake Light Switch
This is one of the more affordable repairs you can make. The part itself is inexpensive, and if you choose to have a shop do the work, the labor is minimal.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $6 - $60 |
| New OEM Part | $18 - $46 |
| Shop Labor | $60 - $120 |
Frequently Asked Questions
Can I replace the brake light switch myself?
Yes, this is a great DIY job for beginners. The switch is located above the brake pedal in the driver's footwell. The job requires basic hand tools and typically takes less than 30 minutes. 🎬 See this walkthrough on how to replace the switch yourself. You will need to disconnect the electrical connector, unscrew or twist the old switch out, install the new one, and then adjust it.
Is adjusting the new switch important?
Yes, adjustment is critical. An improperly adjusted switch can cause the brake lights to stay on, not come on soon enough, or prevent your cruise control from working. Subaru specifies the brake pedal should travel 5.5mm +/- 2.5mm before the lights activate. The switch is threaded, allowing you to turn it to get the correct plunger depth against the pedal stop.
🎬 Watch: A helpful guide on how to adjust your new switch.Why did my original switch fail?
The most common reason for failure is simple wear and tear. The switch is a mechanical part with internal electrical contacts that are used every time you press the brake pedal. Over thousands of cycles, the contacts can wear out, or the plastic housing can become brittle and break.
What's the most common mistake when ordering this part?
The most common mistake is ordering the wrong switch for your car's features. Subaru used different switches for models with cruise control versus those without. Always verify that the part you are buying fits your Legacy's specific trim level (e.g., with or without turbo, with or without cruise control).
Helpful Videos
Technical Specifications
OEM Part Numbers: 83311AA011 (for models without cruise control) 83370AA001 (for models with cruise control/turbo) 83311aa010 83370AA000
Plunger-style mechanical switch with a 4-pin electrical connector. Mounts to the brake pedal bracket assembly.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Subaru Legacy: