There are several reasons why you might need to replace the faulty 95563119402 xenon control unit on a Porsche:

Lighting problems:

• Dim or flashing lights: If your Porsche's xenon lights appear dim, flash, or cycle on and off erratically, it could be a sign of a faulty control unit. The control unit is responsible for controlling the voltage and current sent to the xenon bulbs, and if it's defective, it may not provide the correct power, causing lighting problems.
• No lights at all: If one or both xenon lights don't come on at all, it could be a sign that the control unit is burned out or has another serious problem. In this case, the control unit will need to be replaced to restore the lights' functionality.

Electrical problems:

• Burning odors: If you smell burning odors coming from the xenon headlights, it could be a sign that the control unit is shorted or experiencing another electrical problem. If this occurs, it's important to turn off the lights immediately and have the control unit checked by a qualified electrician.
• Smoke or sparks: If you see smoke or sparks coming from the xenon headlights, it's a clear sign of a serious electrical problem and the control unit needs to be replaced immediately. Continuing to use the lights in this condition could cause serious damage to the car's electrical system.

Other problems:

• Dashboard Errors: If your Porsche's dashboard displays errors related to xenon lights, it could be a sign of a problem with the control unit. Specific error codes can help a mechanic diagnose the problem and determine if the control unit needs to be replaced.
• Automatic functions malfunction: If the automatic functions of your xenon lights, such as automatic leveling or automatic switching on, do not work properly, it could be a sign that the control unit is faulty.

Replacing the xenon control unit:

If you believe the xenon control unit 95563119402 in your Porsche is defective, it's important to have it replaced by a qualified mechanic. Replacing the control unit is a relatively complex operation that requires electrical expertise and specific knowledge of Porsches. An experienced mechanic will be able to properly diagnose the problem, replace the control unit with a genuine part, and ensure your xenon lights function properly.