Front Lights

The front turn signal indicators on the E63 and the E64 are now composed of 26 LEDs on each side. Four more LEDs are used for the side marker lights on each side.

The light module operates the turn signal indicators. It provides the power supply and monitors its outputs for overload/circuit breaks. If an overload or circuit break occurs, the light module issues a Check Control message.

Fig 1: Identifying Front Light

Courtesy of BMW OF NORTH AMERICA, INC.

Check Control Icon	Meaning	Explanation
	Front right indicator failure	Indicator Front right indicator has failed. Have the fault checked by your nearest BMW dealer.
	Front left indicator failure	Indicator Front left indicator has failed. Have the fault checked by your nearest BMW dealer.

The function of the LEDs in the turn signal indicators and side marker lights is monitored by electronic circuitry. The electronic circuit board is located on the top of the indicator casing.

The flashing indicator signal is provided by the light module. The electronic circuit board provides the actual power supply for the LEDs.

If an LED fails, the electronic circuit board completely switches off the power supply for all of the LEDs. The light module then detects the lower power consumption and initiates the Check Control message.

Fig 2: Identifying Electronic Circuit Board - E63/E64 Turn Signal Indicator

Courtesy of BMW OF NORTH AMERICA, INC.

Electronic circuit board on E63/E64 turn signal indicator 

No retrofit option is offered for vehicles built before the model year upgrade.

Fig 3: E63/E64 Front Turn Signal Indicator Circuit Diagram

Courtesy of BMW OF NORTH AMERICA, INC.

Schematic circuit diagram for E63/E64 front turn signal indicator