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Standard Ignition SLS-491 Brake Light Switch
| Brand | Standard Ignition SLS-491 |
|---|---|
| Connector Gender | Female |
| Finish | Plastic |
| Functions | Stoplight Switch |
| Terminal Gender | Male |
| Terminal Type | Blade |
| Fits | Subaru · 33 vehicles |
Push-in design. Installs cleanly with a rectangular connector and blade terminals.
Stoplight switch. Provides reliable brake light activation in a compact electrical design.
Plastic construction. Lightweight black housing with a durable finish for everyday use.
Cross-references Standard Ignition SLS-491, 1S10921 and 18-2354 for the same application. See all 9.
Brake Light Switch for Subaru Applications
The Standard Ignition SLS-491 is a 12-volt brake light switch built with a plastic body, black finish, and a single rectangular female connector. It uses a push-in attachment method and a blade terminal design for direct stoplight switch function in the vehicle’s electrical system. This brake light switch is listed for Subaru WRX, WRX STI, BRZ, Forester, and Impreza applications with specific LED-light configurations.
Key Features
- Brake light switch / stoplight switch function
- 12-volt electrical design
- 4 terminals with blade-style terminals
- 1 rectangular female connector
- Push-in attachment method
- Plastic construction with black finish
- No wiring harness, hardware, or mounting bracket included
Detailed Product Overview
Standard Ignition SLS-491 is a replacement brake light switch for Subaru models that require a direct stoplight switch signal. It is engineered with a female connector, male terminals, and a compact plastic housing to match the original electrical interface. This part number, SLS-491, cross-references 1S10921 for the same application. It also serves as an OE-style replacement for Subaru WRX and Subaru BRZ brake light switch applications where the factory switch uses a push-in mount and 12-volt operation.
What This Part Helps Address
- Brake lamps that do not illuminate when the pedal is pressed
- Stop lamps that stay on after pedal release
- Intermittent brake light operation
- Brake pedal signal issues affecting vehicle lighting circuits
- Replacement needs for worn or electrically inconsistent stoplight switches
Installation Notes and Fitment
Fits 2020-2021 Subaru WRX, N/A. Fits 2021 Subaru WRX STI, N/A. Fits 2020 Subaru BRZ, N/A. Fits 2015-2020 Subaru WRX STI, N/A, w/ LED Lights. Fits 2013-2019 Subaru BRZ, N/A, w/ LED Lights. Fits 2015-2019 Subaru WRX, N/A, w/ LED Lights. Fits 2017-2018 Subaru Forester, N/A, w/ LED Lights. Fits 2013-2016 Subaru Impreza, N/A. Fits 2008-2012 Subaru Impreza, N/A, w/ LED Lights.
Before installation, verify connector shape, terminal count, and vehicle lighting configuration. Confirm the brake pedal switch location and electrical connector alignment before pushing the switch into place. This part number, SLS-491, is listed for Subaru WRX, Subaru WRX STI, and Subaru BRZ applications with the fitment shown above.
Quality Assurance
Standard Ignition is a recognized aftermarket brand for electrical replacement parts, and this brake light switch is built to match the specified connector, terminal, and voltage requirements for the listed Subaru applications.
| Year | Make | Model | Body Type | Position | Notes |
|---|---|---|---|---|---|
| 2021 | Subaru | WRX | — | N/A | — |
| 2021 | Subaru | WRX STI | — | N/A | — |
| 2020 | Subaru | BRZ | — | N/A | — |
| 2020 | Subaru | WRX | — | N/A | — |
| 2020 | Subaru | WRX STI | — | N/A | w/ LED Lights |
| 2019 | Subaru | BRZ | — | N/A | w/ LED Lights |
| 2019 | Subaru | WRX | — | N/A | w/ LED Lights |
| 2019 | Subaru | WRX STI | — | N/A | w/ LED Lights |
| 2018 | Subaru | BRZ | — | N/A | w/ LED Lights |
| 2018 | Subaru | Forester | — | N/A | w/ LED Lights |
| 2018 | Subaru | WRX | — | N/A | w/ LED Lights |
| 2018 | Subaru | WRX STI | — | N/A | w/ LED Lights |
| 2017 | Subaru | BRZ | — | N/A | w/ LED Lights |
| 2017 | Subaru | Forester | — | N/A | w/ LED Lights |
| 2017 | Subaru | WRX | — | N/A | w/ LED Lights |
| 2017 | Subaru | WRX STI | — | N/A | w/ LED Lights |
| 2016 | Subaru | BRZ | — | N/A | w/ LED Lights |
| 2016 | Subaru | Impreza | — | N/A | — |
| 2016 | Subaru | WRX | — | N/A | w/ LED Lights |
| 2016 | Subaru | WRX STI | — | N/A | w/ LED Lights |
| 2015 | Subaru | BRZ | — | N/A | w/ LED Lights |
| 2015 | Subaru | Impreza | — | N/A | — |
| 2015 | Subaru | WRX | — | N/A | w/ LED Lights |
| 2015 | Subaru | WRX STI | — | N/A | w/ LED Lights |
| 2014 | Subaru | BRZ | — | N/A | w/ LED Lights |
| 2014 | Subaru | Impreza | Hatchback | N/A | — |
| 2013 | Subaru | BRZ | — | N/A | w/ LED Lights |
| 2013 | Subaru | Impreza | Hatchback | N/A | — |
| 2012 | Subaru | Impreza | — | N/A | w/ LED Lights |
| 2011 | Subaru | Impreza | — | N/A | w/ LED Lights |
| 2010 | Subaru | Impreza | — | N/A | w/ LED Lights |
| 2009 | Subaru | Impreza | — | N/A | w/ LED Lights |
| 2008 | Subaru | Impreza | — | N/A | w/ LED Lights |
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