The code 63115A417B8 identifies an original BMW LED electronic control module.

Here are all the technical details on what it is needed, where to mount it, and when it needs to be replaced.

What is it for?

This is the LED control module for the turn signal (indicator) and daytime running lights (DRL) for the right (passenger) side.

• It manages the power, intensity and switching of the LED diodes on the right headlight, switching from the fixed white daytime light to the orange turn signal (often sequential or dynamic depending on the vehicle configuration).

• Compatibility Note: This is right side specific and is not interchangeable with the left side (which is coded 63115A417B7 ).

What car is it used on?

This specific module is used on the BMW X7 (G07) Facelift / LCI produced from 2022 onwards (model year 2023-2025+).

It is found on engines equipped with the new split light clusters characteristic of the restyling, including:

• BMW X7 xDrive40d (B57Y Engine)

• BMW X7 xDrive40i (B58N Engine)

• BMW X7 xDriveM60i (S68T Engine)

When should it be changed?

Since it's a solid-state control unit without a filament, there's no mileage or time limit for replacement; it's only replaced in the event of a fault or malfunction. Typical signs that indicate the need for replacement include:

1. Water or moisture in the headlight: This is the main cause of failure. Often located on the bottom or back of the headlight, the accumulation of condensation corrodes the module's circuit boards, causing a short circuit.

2. Light malfunction: The right turn signal or daytime running light (DRL) on the same side stops working altogether, flickers, or stays on at reduced intensity.

3. Instrument panel errors: Warning message appears in the iDrive system such as "Right turn signal faulty" or "Right daytime running light faulty" .

4. Errors in OBD diagnosis: Presence of specific error codes relating to communication or power supply of the right light module (short circuit to ground, no bus communication).

Installation tip: When replacing this module due to leaks, it's essential to thoroughly dry the inside of the headlight and check the integrity of the seals (or the plastic of the headlight itself), otherwise the new control unit will quickly burn out. In some cases, after installation on newer BMW vehicles, the new module may need to be coded or initialized using diagnostic software (such as ISTA) to align it with the vehicle's on-board electrical system.