BMW 540i Headlight
Culprits behind Bmw 540i Headlight Problems
Problems with the Bmw 540i headlight are fairly common for the model. Owners have reported various instances wherein these have been difficult regardless if the car is being driven or parked. Issues can be caused by different components found throughout the lighting system: the housing, the bulb, and even to the relay. Knowing what the real problem is and its solution lies on being keen and observant on what the certain signs are telling you. Here are some of the symptoms, along with a possible solution, that show you the common culprits to a Bmw 540i headlight problem.
Lights aren't supposed to flicker if you turn the knob to the on position. If it's on, it's supposed to steadily stay on; if it's off, it's supposed to stay shut. The problem may simply be in old and worn bulbs that need replacement. When this isn't the case, it's possible that there may be something wrong with the wirings and connections in the headlights.
A worse problem to have on your headlights is having ones that won't turn off even after you switch the knob to the off position. If that's not bad enough, the lights continue to stay on even after you kill the engine and remove the key. The common culprit is a faulty Bmw lighting control module (LCM) that acts like a relay that sends electricity to the lights. Replacing the faulty module should solve the issue.
The bulbs of your headlights should stay firm and secure when installed to the housing. Any sign of excessive play and looseness is indicative of a problem with the adjusting mechanism of the assembly. You should get this checked at once so that the bulbs maintain a steady aim throughout your use of the car.
The automatic aiming system of the Bmw 540i headlights ensure that the lights are always pointing in the right level and direction at all times. If it constantly changes, manually readjusting it won't do the trick. It may be necessary to check and replace the automatic tilt sensors of the car that controls the aim of the light.