Subaru Impreza Brake Light Switch Guide: 1999-2005 Models
If your brake lights or cruise control are acting up, this small switch is often the culprit.
- A failing brake light switch is a major safety issue; replace it immediately if your brake lights don't work.
- Symptoms are not limited to lights; a bad switch is a common cause of cruise control failure.
- This is an easy and inexpensive DIY repair that most owners can complete in under 30 minutes.
- Verify if your car needs a 2-pin or 4-pin switch before buying; this depends on whether you have cruise control.
Is Your Impreza's Brake Light Switch Failing?
A bad brake light switch on a 1999-2005 Impreza can cause confusing problems. Because it's tied into both the brake and cruise control systems, the symptoms aren't always obvious. One day your cruise control might not set, and the next your brake lights could be stuck on, draining the battery. Ignoring these signs is a safety risk, as drivers behind you won't know 🎬 Watch what happens when brake light wiring goes wrong. when you're slowing down.
Major Recall on Later Models
Subaru issued a massive recall for brake light switches on many 2008-2016 models, including the Impreza. The issue was that silicone gas from interior cleaning products could contaminate the switch and cause it to fail. While the 1999-2005 generation was not part of this specific recall, the switches can still fail from age, wear, and internal shorts.
Common Symptoms of a Bad Switch
- Brake Lights Don't Work: The most dangerous symptom. The switch fails to complete the circuit when you press the pedal.
- Brake Lights Stay On: The switch can get stuck in the 'on' position, leaving your brake lights permanently lit and draining your battery.
- Cruise Control Won't Engage or Disengages Randomly: The system needs a clear signal from the brake switch to operate. A faulty switch can prevent it from turning on or cause it to shut off unexpectedly.
- ABS Warning Light: On some models, a faulty brake light switch can trigger the Anti-lock Braking System (ABS) warning light on your dashboard.
Choosing the Right Aftermarket Brake Light Switch
For a part like this, you don't necessarily need to buy an expensive OEM part from the dealer. Many aftermarket brands offer reliable quality, sometimes from the same factories that supply Subaru. Here’s how the common brands stack up.
Brand Quality Tiers
Tier 1: Premium Aftermarket (OEM Equivalent)
- Beck Arnley: Often considered a top-tier choice for import vehicles. They are known for sourcing parts from OEM suppliers and repackaging them, so you might get an OEM-quality part without the dealer price.
- Standard Ignition (SMP): A well-respected brand in the industry known for producing durable and reliable electronic components. A solid choice for a long-lasting repair.
Tier 2: Standard Replacement
- Dorman: A widely available brand that produces a huge range of aftermarket parts. Quality can sometimes be inconsistent, but for a simple switch, it's generally a functional and affordable option.
- Holstein & Facet: These brands offer dependable, standard-grade replacements that meet original specifications and are a good balance of price and performance.
Tier 3: Economy Options
- True Tech & Rostra Powertrain: These are typically the most budget-friendly options. They can be a good choice if cost is your primary concern, but may not offer the same longevity as premium brands.
Pro Tip: Check the Connector
Your Impreza may have a 2-pin or 4-pin switch depending on whether it has cruise control. Always verify the number of pins on your original switch before ordering a replacement to avoid installation headaches. The 4-pin version is common on cars with cruise control.
Cost to Replace a Subaru Impreza Brake Light Switch
| Part Type | Average Cost |
|---|---|
| New Aftermarket Part | $6 - $60 |
| New OEM Part | $45 - $75 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions
Can I replace the brake light switch myself?
Yes, this is a great DIY job for beginners. The switch is located on the brake pedal bracket under the dashboard. It's usually held in place by a nut and can be swapped out in about 15-30 minutes 🎬 Watch this step-by-step 2005 Impreza switch replacement guide. with basic hand tools. You just need to disconnect the electrical connector, unscrew the old switch, and install the new one.
Why did my cruise control stop working but my brake lights are fine?
The brake light switch often has two separate internal circuits: one for the lights and one for the cruise control signal. It's possible for the cruise control circuit to fail while the brake light circuit continues to work normally.
Is a bad brake light switch dangerous?
Yes, it is very dangerous if it prevents your brake lights from working. Drivers behind you will have no warning that you are slowing down, which significantly increases the risk of a rear-end collision. If your brake lights are not working, you should not drive the vehicle.
What is the difference between a 2-pin and 4-pin switch?
A 2-pin switch typically only controls the brake lights. A 4-pin switch is used on models with cruise control, as it has an additional circuit to send a signal to the cruise control module. Ensure you buy the correct one for your car's features.
Helpful Videos
Technical Specifications
OEM Part Numbers: 83370AA001 83370AA000 83370AA010
Located on the brake pedal assembly. Typically a 4-pin connector for models with cruise control and a 2-pin for models without. The switch is a plunger type that is activated by the movement of the brake pedal.
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 Impreza:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Impreza's Brake Light Switch Failing?
- Major Recall on Later Models
- Common Symptoms of a Bad Switch
- Choosing the Right Aftermarket Brake Light Switch
- Brand Quality Tiers
- Pro Tip: Check the Connector
- Cost to Replace a Subaru Impreza Brake Light Switch
- Frequently Asked Questions
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