Factory Replacement Signal Lights by URO Parts®. URO Parts is becoming increasingly known for a its quality and selection of electrical components. URO Parts offers a variety of lamps, and lenses for many models. Rigorous testing and extensive quality ensure excellent performance and durability. URO Parts sources several electrical components directly from the OE manufacturer. Many of its relays and switches cost less than half of other European brands, meeting the growing demand for an alternative to the costly factory pieces.