Electronics have improved the function of every system on modern vehicles and your brakes are no different. Anti-lock brake systems that prevent wheel lockup for safe, controlled stops are commonplace today, as are warning systems for brake fluid pressure, fluid level, pad wear, and parking brakes. All of these systems use sensors and switches to input data to control modules and open and close electric circuits.

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    • (0 reviews)
      # sp123750
      GM Original Equipment Electronic Brake Module Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      +3
      $14.72 - $61.32
    • (0 reviews)
      # sp123759
      GM Original Equipment Suspension Yaw Sensor by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $62.35 - $437.39
    • (0 reviews)
      # sp20238
      GM Original Equipment™ ABS Pressure Monitor Switch by ACDelco®. These GM Original Equipment parts replace those installed during the production of a GM vehicle and are designed to be of similarly high quality. We have a portfolio of...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $50.37 - $83.52
    • (0 reviews)
      # sp10310
      GM Original Equipment™ ABS Wheel Speed Sensor by ACDelco®. These GM Original Equipment parts replace those installed during the production of a GM vehicle and are designed to be of similarly high quality. We have a portfolio of 33,000...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.64 - $185.24
    • (0 reviews)
      # sp10311
      GM Original Equipment™ ABS Wheel Speed Sensor Wiring Harness by ACDelco®. These GM Original Equipment parts replace those installed during the production of a GM vehicle and are designed to be of similarly high quality. We have a...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $15.50 - $185.24
    • (0 reviews)
      # sp93742
      GM Original Equipment™ Brake Control Relay Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $25.46 - $32.40
    • (0 reviews)
      # sp93746
      GM Original Equipment™ Brake Harness Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $10.85 - $51.96
    • (0 reviews)
      # mpn776128189
      GM Original Equipment™ Brake Pressure Modulator Pump Motor Connector by ACDelco®. Connector/Terminal Configuration: 2-Way Terminals Female. Finish: Black. Designed utilizing the latest technology, this product by ACDelco features...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $22.11
    • (0 reviews)
      # sp93752
      GM Original Equipment™ Brake Pressure Modulator Sensor Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $11.90 - $55.89
    • (0 reviews)
      # mpn776128249
      GM Original Equipment™ Brake Pressure Modulator Valve Solenoid Connector by ACDelco®. Connector/Terminal Configuration: 2-Way Terminals Female. Finish: Natural Colored. Designed utilizing the latest technology, this product by ACDelco...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $20.68
    • (0 reviews)
      # sp20192
      GM Original Equipment™ Traction Control Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle,...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $14.60 - $85.59
    • (0 reviews)
      # sp93755
      GM Original Equipment™ Traction Control Module Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $16.96 - $54.05
    • (0 reviews)
      # sp93757
      GM Original Equipment™ Traction Control Switch by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.60 - $210.74
    • (0 reviews)
      # sp93760
      Professional™ ABS Relay by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.23 - $27.69
    • (0 reviews)
      # sp93761
      Professional™ ABS Warning Lamp Relay by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $16.64
    • (0 reviews)
      # sp11819
      Professional™ ABS Wheel Speed Sensor by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $23.63
    • (0 reviews)
      # sp11775
      Professional™ Electronic Brake Control Relay by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $8.50
    • (0 reviews)
      # sp108057
      ABS Harness Connector by Dorman®. Easily and affordably restore the anti-lock brake system to proper, safe functioning with Dorman’s Anti-Lock Brake Wheel Speed Sensor Wire Harness. It’s sold separately, enabling you to replace only...
      Connector included for easy mounting to the sensorPlug and play for ease of installation; no wire splicing necessary
      $21.81 - $24.64
    • (2 reviews)
      # sp4022
      ABS Speed Sensor by Dorman®. Restore the anti-lock brake system to safe, proper operation with Dorman’s Anti-Lock Brake System Wheel Speed Sensor. It effectively transmits the vehicle’s wheel speed through the harness, back to the...
      Engineered from high-quality materials for years of serviceDirect replacement for a proper fit every time
      $7.78 - $146.70
    • (1 review)
      # sp25320
      ABS Wheel Speed Sensor Wire Harness by Dorman®. Easily and affordably restore the anti-lock brake system to proper, safe functioning with Dorman’s Anti-Lock Brake Wheel Speed Sensor Wire Harness. It’s sold separately, enabling you...
      Connector included for easy mounting to the sensorPlug and play for ease of installation; no wire splicing necessary
      $21.81 - $43.95
    • (0 reviews)
      # mpn2335607
      Rear Traction Control Module Connector by Dorman®. With Leads. Shape: Rectangular. Connector/Terminal Configuration: 4-Way Terminals Female. Wire Length: 1.16". Wire Quantity: 6. Material: Metal. Finish: Black. Quantity: 1. Dorman...
      No special tools required for installationEasy to install
      $12.99
    • (0 reviews)
      # mpn2335607
      Traction Control Module Connector by Dorman®. With Leads. Shape: Rectangular. Connector/Terminal Configuration: 4-Way Terminals Female. Wire Length: 1.16". Wire Quantity: 6. Material: Metal. Finish: Black. Quantity: 1. Dorman offers a...
      No special tools required for installationEasy to install
      $12.99
    • (0 reviews)
      # sp9303
      ABS Wheel Speed Sensor by Wagner®. Wagner® Brake products deliver improved OE-design products to the aftermarket giving you the capability to repair and improve a brake system with the finest products possible.
      Innovative engineeringExtensive field testing
      $28.69 - $92.85
    • (0 reviews)
      # sp94473
      ABS Wheel Speed Sensor by Bosch®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at...
      High quality at an affordable priceExpertly made from premium materials
      $13.77 - $99.95
    • (0 reviews)
      # mpn413458
      ABS Modulator Relay by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand...
      High quality at an affordable priceExpertly made from premium materials
      $21.76
    • (0 reviews)
      # mpn397317
      ABS Pump and Motor Relay by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand...
      High quality at an affordable priceExpertly made from premium materials
      $35.40
    • (0 reviews)
      # sp107848
      ABS Relay by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand understands...
      High quality at an affordable priceExpertly made from premium materials
      $6.32 - $28.67
    • (1 review)
      # sp7837
      ABS Wheel Speed Sensor by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand...
      High quality at an affordable priceExpertly made from premium materials
      $15.15 - $404.61
    • (1 review)
      # sp5547
      ABS Wheel Speed Sensor by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM quality...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $7.18 - $130.20
    • (0 reviews)
      # sp26522
      Traction Control Switch Connector by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM...
      Direct OEM replacementMeets strict Ford Motor Company standards
      $17.05 - $31.74




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    The most important sensors and switches alert you to problems in your brake system like a loss of pressure and low fluid level. The pressure differential switch illuminates a brake warning light when there is a leak and a loss of pressure in a hydraulic circuit. A leak will cause a low brake pedal and diminished braking capability, and the brakes should be inspected immediately. Low fluid level in the master cylinder can also be caused by a leak.

    When the parking brakes are applied, a switch illuminates a warning light to remind you to release them before driving. Driving with the parking brakes on will cause excessive wear, and possibly costly damaged if the vehicle is driven a distance. The stop lamp switch is mounted on the brake pedal and activates the brake lights when you push on the pedal. On some vehicles the same switch also turns off the cruise control and torque converter clutch when the pedal is depressed. Some newer vehicles use a brake pedal position sensor instead of a switch that provides input to the engine and body control modules.

    The ABS warning light will come on if there is a fault in the system. The ABS system will turn off, but regular braking usually will not be affected as long as the brake warning light isn’t on. The system should be diagnosed as soon as possible to restore ABS function. The ABS wheel speed sensor sends a voltage signal to the ABS control module indicating wheel speed. During braking, if one wheel slows down much faster than the others, the control module will reduce hydraulic pressure to that wheel to prevent lockup. The sensor is mounted next to a toothed ring on the wheel hub, axle shaft, or differential ring gear.

    Many vehicles with disc brakes are equipped with pad wear sensors. On most systems the sensors are attached to the pads, and when the pads wear to a predetermined thickness, the sensors contact the brake rotors and illuminate a light on the dash, alerting the driver that pad replacement is needed. The position of the sensor is calibrated to leave enough pad material to allow time for the repair to be scheduled. Since pad wear sensors are “sacrificial components”, they must be replaced along with the pads. You’ll find these sensors and any other brake sensors and switches you need on our digital shelves.

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    Brake System Sensors Reviews

    Average rating:  5  5 - 17 reviews
    4.5 of 5
    Brake Light Switch
    Look just like the picture easy to install. Before purchasing is good to look on the back of the pedal due to other parts my be needed.
    KPosted by Kenneth (Garfield, AR) / October 19, 2017
    1987 Honda Prelude
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