Water Pump Inner Rotor for Engine Water Pump 161A0-39015 161A0-29015 compatible with Prius ZVW30 2010-2015 and Aqua 2012.This inner rotor is designed to fit the specified water pump models and supports proper coolant circulation within the engine system.It is engineered for precise function and under normal operating conditions.The component matches the specifications for function in the applicable vehicle models.This is a non-OEM replacement.Any mention of brand names is strictly for compatibility clarification.