Here are the main reasons and symptoms that make it necessary to replace 63217491664 :

1. Daytime Running Lights (DRL) malfunction

The most common symptom is a faulty daytime running light. If the module stops working properly, the following problems may occur:

• DRL Off: The daytime running light stops coming on completely on one side of the vehicle.

• DRL Intermittent/Flicker: The light turns on and off erratically (flickers).

• Reduced Light Intensity: Daylight is visibly dimmer or weaker than the other.

2. Turn Signal Lights Failure

Since this module also manages the turn signals, its failure can cause:

• Turn Signal Off: The turn signal does not come on at all.

• Fast or Irregular Arrow: The arrow flashes at an abnormal rate (often associated with a burned out LED or load problems), or does not flash evenly.

3. Error Messages in the Trip Computer

When the LED module fails, the vehicle's electronic control unit (ECU) detects this and generates a fault code, often displaying a light failure message on the instrument cluster (such as "Daytime Running Lights Failure" or "Turn Signal Failure").

Technical Reasons for Failure

Module failure is usually attributed to:

• Water Ingress: Water or moisture can enter the headlight housing or directly into the module, causing short circuits or corrosion of electronic components.

• Overheating: The heat generated by the LEDs and circuitry can, over time, damage the module's internal components.

• Faulty Electronic Components: As in any electronic device, components (resistors, capacitors, chips) can burn out or fail.

Replacing the module with a replacement (new or tested used) is the only solution to restore full functionality and remove the error message.