Modified Polybutylene Terephthalate (PBT) materials are critical in modern automotive design due to their ability to meet diverse and demanding functional requirements. For interior components, modified PBT grades are engineered for high-temperature resistance to withstand summer cabin heat, low gloss to reduce driver glare, and excellent weather resistance to prevent fading and degradation. Exterior applications demand PBT with high strength, high toughness, superior impact resistance, and long-term stability against environmental conditions like UV exposure, moisture, and temperature cycling. These tailored properties have led to the widespread adoption of PBT across the vehicle. Specific applications include functional parts like door lock systems, mirror housings, and door handles; lighting components such as lamp frames, headlamp baffles, and lamp sockets; under-the-hood electrical systems including connectors, fuse boxes, and ignition system parts; and critical safety components like fuel pump housings and airbag system parts. The global automotive industry's steady growth, with production expected to continue rising, will further drive demand for high-performance PBT materials. Keyuan's automotive PBT materials, for instance, are specifically formulated for applications like car lamp parts and hydrolysis-resistant connectors, offering a crucial balance of outstanding heat resistance, good electroplatability for metallized finishes, and exceptional hydrolysis resistance to ensure reliability in harsh under-hood environments.