A Guide to the Brake Light Switch for the 2016-2022 Dodge Challenger
If your Challenger won't start or has brake light issues, this small, inexpensive switch could be the reason.
- A bad brake light switch is a common reason a push-to-start Challenger won't start.
- Symptoms are varied and include a dead battery from lights staying on or being unable to shift from Park.
- Replacement is simple, but the new switch may require electronic calibration with a scan tool to function correctly.
- This is a very inexpensive part, making DIY replacement highly cost-effective if you can perform the calibration.
Understanding Brake Light Switch Failure
A failing brake light switch on a 2016-2022 Dodge Challenger can be confusing. The symptoms often seem unrelated to the brake lights. Because the switch is tied into the ignition and transmission systems, a failure can prevent you from starting the car or shifting out of park. This can leave you stranded. Other common signs include brake lights that won't turn on, or brake lights that stay on even when the car is off, which can drain your battery.
Calibration May Be Required
On many modern Mopar vehicles, including the Challenger, replacing the brake light switch is not just a simple swap. The new switch often needs to be calibrated with a diagnostic scan tool. If this step is skipped, the car's computer may not recognize the switch's correct 'on' and 'off' positions. This can lead to the brake lights staying on constantly even after installing a new part. If you are performing a DIY replacement, be prepared for this possibility.
🎬 See how to calibrate the sensor if lights stay onCommon Symptoms of a Bad Brake Light Switch
- Engine Will Not Start: With the push-button start system, the car must detect that the brake pedal is pressed before the engine will turn over. A bad switch prevents this signal, leaving you in accessory mode.
- Brake Lights Stay On: The switch can fail in the 'on' position, leaving your brake lights illuminated and draining the battery.
- Brake Lights Do Not Work: The switch can fail in the 'off' position, creating a serious safety hazard 🎬 Watch: How to test your Challenger's brake light switch as drivers behind you won't know you are stopping.
- Cannot Shift Out of Park: The switch controls the shift interlock, a safety feature that locks the shifter in Park 🎬 Learn why your transmission might be stuck in park until the brake is applied.
- Cruise Control Issues: The cruise control may not engage or may shut off unexpectedly because it receives a false signal from the failing switch.
- ABS/ESC Warning Lights: The stability control and anti-lock brake systems use data from the brake switch, and a fault can trigger warning lights on your dashboard.
Choosing the Right Aftermarket Part
When shopping for a replacement brake light switch, you will find both OEM (Original Equipment Manufacturer) Mopar parts and aftermarket options. For a simple electronic part like this, a quality aftermarket brand can offer reliable performance at a good price.
- OEM Mopar: This is the same part your vehicle was built with. It guarantees perfect fit and function, though it may cost slightly more.
- Aftermarket (Rostra Powertrain): Quality aftermarket brands like Rostra engineer their parts to meet or exceed original specifications. They are a cost-effective alternative to OEM without sacrificing reliability for this component. Given the low cost of the part, choosing a reputable aftermarket brand is a sound decision.
Cost of Replacing a Dodge Challenger Brake Light Switch
| Part Type | Estimated Cost |
|---|---|
| New OEM (Mopar) | $15 - $35 |
| New Aftermarket (Rostra) | $22.37 |
| Shop Labor | $49 - $72 |
| Total Professional Repair | $71 - $107 |
Frequently Asked Questions
Is it difficult to replace the brake light switch myself?
No, the replacement itself is very easy for most DIYers. The switch is located on the brake pedal bracket and usually just twists into place. The main challenge is the awkward position you have to get into in the driver's footwell. The most critical part is the potential need for electronic calibration after installation.
Why won't my Challenger start if the brake light switch is bad?
Your Challenger has a push-button start that requires a signal from the brake light switch to confirm the pedal is pressed. Without this signal, the engine will not start as a safety precaution.
Are there any recalls for the 2016-2022 Challenger brake light switch?
No, searches of the NHTSA database did not show any specific recalls for the brake light switch on the 2016-2022 Dodge Challenger models.
Can a bad brake light switch drain my battery?
Yes. If the switch fails and causes the brake lights to stay on continuously, it will drain the battery, often overnight.
Helpful Videos
Technical Specifications
Located on the brake pedal support bracket. Typically a 4-pin connector. May require calibration after installation.
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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.
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