Brake Light Switch for 2018-2022 Infiniti Q50 & More - Standard Ignition SLS637

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$143.99
MPN: SLS637
Item Package Quantity: 1
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Standard Ignition Brake Light Switch P/N:SLS637
Standard Ignition Brake Light Switch P/N:SLS637
$143.99

Help your brake lights signal every stop with a Standard Ignition switch built for the job. The SLS637 Stoplight Switch (brake light switch) is designed to turn the brake lights on when the brake pedal is pressed. It is a direct-fit OE replacement for the 2018-2022 INFINITI Q50 and 2018-2021 INFINITI Q60. See the Buyer's Guide tab for engine-specific details.

  • 100% tested: Every switch is checked to verify both its mechanical and electrical switching performance.
  • Copper alloy conductors: Provide superior electrical conductivity with low resistive losses.
  • Direct-fit OE replacement: Each stoplight switch is designed for ease of installation on the listed applications.
  • Quality materials: Chosen to withstand extreme conditions for prolonged durability.

Standard Ignition is a global manufacturer of automotive aftermarket products and maintains complete quality control throughout the manufacturing process.

Signs this part may need replacing include brake lights that stay on, brake lights that do not come on when the pedal is pressed, or lights that work only intermittently. Bulbs, fuses, and wiring can cause the same symptoms, so diagnose the cause first. If a failed stoplight switch is the problem, the SLS637 replaces it.

Interchange: S42143 · BLSA207 · SL1189 · 253206HL0A

This part cross-references / interchanges with the following part numbers:

S42143, BLSA207, SL1189, 253206HL0A, SLS637

Frequently Asked Questions

What does the SLS637 stoplight switch do?

It turns the brake lights on when the brake pedal is pressed and off when the pedal is released. Its copper alloy conductors carry the switched current.

Is this the right brake light switch for a 2018-2022 INFINITI Q50 or 2018-2021 INFINITI Q60?

The SLS637 is a stoplight switch listed for the 2018-2022 INFINITI Q50 and the 2018-2021 INFINITI Q60. See the Buyer's Guide tab for engine-specific details.

What are signs a brake light switch may need replacing?

Common signs are brake lights that stay on, fail to light when the pedal is pressed, or work intermittently. Bulbs, fuses, and wiring can cause similar issues, so diagnose the cause first.

How is this switch tested?

Standard Ignition 100% tests each stoplight switch to verify both its mechanical and electrical switching performance.

Which part numbers does the SLS637 interchange with?

It interchanges with S42143, BLSA207, SL1189, and 253206HL0A.