BMW 540d Bulb Size Guide | Exterior & Interior Lights

What is the correct light bulb size for BMW 540d? It is a popular question as BMW 540d lamps tend to fade out and dim off over time due to the limited life span.

Our comprehensive chart will guide you through BMW 540d light bulb sizes for all interior and exterior lamp types like headlights, fog lights, turn signals, brake lights, tail lights, license plate, dome lights, trunk lights and many more.

You will learn how to upgrade BMW 540d with LED lights or install HID headlight conversion instead of spending countless hours trying to figure out the needed light bulb size.