The Bosch 1124035221 Alternator Rotor is a high-quality, genuine OEM component designed for optimal performance in alternators. This rotor is a direct replacement for Volvo Penta part numbers 1698180 and 876077, ensuring perfect fit and function. It is engineered to provide efficient power generation for a wide range of Volvo Penta marine diesel engines, including AQAD, KAD, KAMD, MD, TAMD, and TMD series. With an outer diameter of 105 mm, an inner diameter of 17 mm, and a length of 137.5 mm, this rotor weighs 1.05 kg, making it a robust and reliable choice for maintaining your marine engine's electrical system.