C5Y3437AZB | Genuine Mopar® ABS Control Module & HCU For Mazda 5, 1.8/2.0L

1. Monitors Wheel Speed

Receives signals from wheel speed sensors to detect when a wheel is about to lock up.

2. Controls Brake Pressure

Sends commands to the ABS hydraulic pump and valves to rapidly:

• Increase

• Hold

• Release
  brake pressure to prevent skidding.

3. Improves Steering Control During Braking

By preventing wheel lock-up, it allows the driver to steer while braking hard.

4. Enhances Stability and Safety

Works with other systems such as:

• Traction Control

• Electronic Stability Control (ESC)

• Brake Assist

5. Stores Diagnostic Trouble Codes

If the ABS system fails, the module:

• Turns on the ABS warning light

• Stores fault codes for technicians

1. ABS Warning Light or Brake Light Turns On

• The ABS light, Brake light, or both may illuminate

• Often the first and most obvious symptom

• The module stores fault codes that point to ABS system issues

2. Anti-Lock Brakes Stop Working

• ABS will be disabled, and the vehicle may revert to normal braking

• During hard braking, wheels may lock up, causing skidding

3. Traction Control or Stability Control Light Comes On

• Since ABS, Traction Control, and ESC share sensors and circuits, module failure can trigger:

  • TCS light

  • ESC/ESP light

4. Brake Pedal Feels Unusual

• Pedal may feel:

  • Harder than normal

  • Softer/spongy

  • Pulsate at the wrong times

5. Speedometer Malfunctions (on certain vehicles)

• Some ABS modules share signals with the speedometer

• Speed reading may be wrong or drop to zero intermittently

6. ABS Pump Running Constantly

• A damaged module may send incorrect commands causing the pump to:

  • Run continuously

  • Run even when the car is off
    This can drain the battery.

7. Poor Braking Performance

• Increased stopping distance on slippery roads

• Vehicle may skid or slide during emergency braking

8. Intermittent Braking Issues

• ABS may activate randomly when it shouldn’t

• Or fail to activate when it should