The module has different codes 901251370 90109602 90118057 B101758-B LED daytime running light and turn signal module for VOLKSWAGEN Passat and Arteon.

For vehicles with right LED headlights.

The LED module 901251370 90109602 is an electronic control unit (or ballast) that manages the operation of the LED lights inside the headlights of vehicles such as the Volkswagen Passat and Arteon . Specifically, it is responsible for controlling the daytime running lights (DRL) and LED turn signals .

What is it for?

This module has the task of:

• Powering LEDs Correctly: LEDs require a specific voltage and current supply to function properly and ensure their longevity. The 90109602 module regulates and stabilizes this power supply.

• Manage light functions: Control the switching on, off and different modes of the daytime running lights and direction indicators (for example, the dynamic effect on some models).

• Protect LEDs: Prevents LED damage from power surges or surges.

• Communicate with the vehicle's main control unit: Integrates the lighting system with the car's general electronics, allowing for the correct reporting of any malfunctions.

Why replace LED module 901251370 90109602 B101758-B ?

Replacing this module becomes necessary when the LED lights it controls malfunction. The most common reasons for this module to fail include:

• LED malfunction: If the LEDs in your daytime running lights or turn signals stop working properly (flash erratically, go out completely, or dim), the cause is often not the LED itself, but the module that powers it.

• Short circuits or overvoltages: Any electrical problems in the vehicle's system can damage the module.

• Water or moisture ingress: Water or moisture can corrode the module's internal circuitry, causing it to fail.

• Internal Component Failure: Like any electronic component, the module can also fail due to wear and tear or manufacturing defects in its internal components.

• Vehicle Control Unit Errors: In some cases, the vehicle's main control unit may report a lighting system error due to a faulty LED module.

Replacing this module is often a cheaper solution than replacing the entire headlight, as the headlight itself may be intact but not working due to the failure of this specific electronic component. Many replacement parts are "plug & play," meaning they can be installed without significant modifications to the vehicle's original wiring.