BMW Bulb (H4) - Genuine BMW 63121354619

Product Information

BMW Exterior Lighting diagram for 2002

A headlight bulb is the light source within a vehicle’s headlight assembly that illuminates the road ahead, enabling better visibility during nighttime driving and in poor weather conditions. Headlight bulbs come in various types, including halogen, HID (high-intensity discharge), and LED (light-emitting diode), each offering different levels of brightness, longevity, and energy efficiency.

• Dim or Flickering Light: A dim or flickering headlight usually indicates that the bulb is nearing the end of its lifespan or that there is a poor electrical connection
• Headlight Out: When only one headlight fails, it’s typically due to a burnt-out bulb. This is one of the most common signs and is usually straightforward to fix by replacing the faulty bulb
• Complete Failure of Both Headlights: If both headlights stop working, it’s less likely to be a bulb issue and more likely a fuse, relay, or wiring problem

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.