Ford GT Brake Light Switch Guide for Model Years 2017-2022
This small switch does more than just control your brake lights; a failure can prevent your GT from starting or create a serious safety hazard on the road.
- A faulty brake light switch is a critical safety issue and should be addressed immediately.
- Symptoms include brake lights staying on, not working at all, or a no-start condition.
- High-quality aftermarket brands like Rostra and Standard Ignition are excellent alternatives to OEM.
- Replacement is a simple DIY task for most owners, typically requiring no special tools.
Understanding the Brake Light Switch on Your Ford GT
The Ford GT is a limited-production supercar, and widespread, documented failures of its brake light switch are not common. However, the part functions just like those in other modern vehicles, and its potential failure points are well understood. The switch is a small sensor mounted to the brake pedal bracket. Its job is to tell the car's computer systems when the brake pedal is pressed or released. Given its constant use every time you drive, it is a wear-and-tear item that can eventually fail.
Choosing the Right Aftermarket Brake Light Switch
For a part like a brake light switch, a high-quality aftermarket replacement is a reliable and cost-effective alternative to a dealer-sourced OEM part. Aftermarket brands often have extensive experience with electronic components across many vehicle types. The key is to choose a reputable brand.
Brand Quality Tiers:
- Premium Aftermarket (Rostra, Standard Ignition): Brands like Rostra and Standard Motor Products (SMP) have strong reputations. Rostra is a US-based manufacturer with quality certifications and experience as an Original Equipment (OE) supplier for some brands. Standard is a long-standing, trusted name in automotive electronics. These brands are an excellent choice for peace of mind.
- Mid-Grade Aftermarket (Dorman, Holstein): Dorman is known for its vast catalog and sometimes offers parts that improve on the original factory design. Their quality can be inconsistent, but for a simple switch, they are generally a solid choice. Holstein specializes in vehicle sensors and offers good warranties, making them a dependable option.
- Economy Aftermarket (Replacement, True Tech): These are often private-label brands that offer the lowest price. While functional, they may not have the same long-term durability or rigorous quality control as premium brands. They can be a viable option for a quick fix on a budget.
Aftermarket Cost Overview
| Part | Price Range |
|---|---|
| New Aftermarket Brake Light Switch | $23.47 - $35.96 |
Pro Tip: Check the Pedal Bumper First
Some Ford models have had recalls where a small plastic or rubber bumper on the brake pedal arm disintegrates. When this happens, the switch plunger is no longer depressed when your foot is off the brake, causing the brake lights to stay on constantly. While the Ford GT was not part of this recall, inspect the area around the switch. If you see crumbled plastic bits or if the switch plunger is not making contact with a stopper on the pedal arm, you may only need to replace the bumper, not the entire switch.
Frequently Asked Questions (FAQ)
Can I replace the brake light switch myself?
Yes, this is a very DIY-friendly job. The switch is located under the dashboard, attached to the brake pedal assembly. It usually requires disconnecting a single electrical connector and then twisting the switch to remove it from its bracket. No special tools are needed, though access can be tight.
Are there any recalls for the Ford GT brake light switch?
As of early 2026, there are no specific NHTSA recalls for the brake light switch on the 2017-2022 Ford GT. Recalls for other Ford models, like the 2015 Mustang, were related to a pedal stop bumper, not the switch itself.
What's the difference between a brake light switch and a brake pressure sensor?
A brake light switch is a mechanical switch activated by the movement of the brake pedal. Some older or different systems use a hydraulic pressure switch that activates when it detects a pressure increase in the brake fluid lines. Your Ford GT uses the mechanical switch located at the pedal.
Why won't my GT start? Could it be the brake light switch?
Yes. For cars with a push-button ignition, the vehicle's computer must receive a signal from the brake light switch to confirm the brake is engaged before it will allow the engine to start. If the switch is faulty and not sending this signal, your car will not start, and you may see a message on the dash like "Press Brake to Start" even when you are.
Technical Specifications
OEM Part Numbers: SW8395
Mounts to brake pedal bracket. Typically features a 4-pin rectangular connector.
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.
- Ford GT: