BMW Wiring Light Regulator - Genuine BMW 63128381479

Product Information

BMW Exterior Lighting diagram for 740i, 740iL, 750iL

A Headlight Wiring Harness is a set of electrical wires and connectors that link the vehicle's power source to the headlights, supplying the necessary electricity for the lights to function. It connects to headlight components such as bulbs, relays, and switches, allowing drivers to control the headlights and other associated features, like high beams or daytime running lights.

• Headlights Flickering: Intermittent flickering can indicate a loose connection, frayed wires, or damage in the wiring harness
• Headlights Not Working: If one or both headlights fail to turn on, this could indicate a fault in the wiring harness, especially if the headlight bulbs themselves are still good

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.