The A-Premium Alternator Regulator is designed for optimal performance in BMW vehicles. It ensures stable voltage regulation, enhancing the efficiency and longevity of your car's electrical system. Key Features: - Compatible with BMW E89 Z4 models from 2009 to 2016 - Provides consistent 14.3V regulation - Enhances engine performance and fuel efficiency Technical Specifications: - Designed for 3.0L engines - Fits BMW E89 Z4 models from 2009 to 2016 - Voltage output: 14.3V