How do you reset the check engine light on a BMW Z3?

To reset the check engine light on a BMW Z3, you can use a diagnostic tool to clear the fault codes stored in the engine control unit (ECU). Alternatively, you can disconnect the car's battery for about 15 minutes, which will also reset the light. However, it's important to first address any underlying issues that triggered the light before resetting it. Always consult a professional if you're unsure about the process.