Q: 07 BMW 328xi pre LCI, HID Conversion causing lamp errors and red car on lift notification

It’s getting harder and harder to do modifications to a car, even minor ones without causing other issues. The lighting module is clearly not seeing the levels that it expects to see when it powers up the lights. Many accessory companies have developed different devices to attempt to fool the modules, but since the modules are now communicating with each other via a digital stream, any odd signals can throw the whole system into chaos. If your accessories plugged right into the harness without any wire modifications, it may be possible to reprogram the lighting module to recognize the HID lights. But that operation could only be performed with the computer equipment that is used by the dealer and BMW specialty shops. If part of your installation involved cut and splice operations, it’s hard to imagine that you will be able to get the module to accept the changes. It may help to have another pair of eyes on the problem. By contacting YourMechanic, you can have a technician come to your home or office to inspect your headlights and render some practical advice.