2-Pack H4 / 9003 Ceramic Headlight Bulb Socket & Wire Harness Keep your vehicle's headlights running reliably with these heavy-duty H4 / 9003 ceramic wire harness sockets. Featuring a heat-resistant ceramic plug body rated up to 1000°C and a 16-gauge copper wire lead, these connectors are built to handle the intense heat generated by headlight bulbs — making them a smart, affordable upgrade or direct replacement for worn or melted factory sockets. Key Features Universal H4 / 9003 Fitment — 3-hole base design compatible with a wide range of vehicles using H4 or 9003 headlight bulbs. High-Temperature Ceramic Body — Withstands temperatures up to 1000°C, far outlasting standard plastic sockets that can melt or warp over time. 16-Gauge Copper Wire — Thick, high-conductivity copper wiring ensures a stable electrical connection and reduces resistance for consistent bulb performance. Durable & Long-Lasting — Ceramic + copper construction delivers an extended service life, resisting corrosion and heat degradation. Compact Cable Length — Approximately 10 cm / 3.94" lead wire for easy integration into your existing headlight wiring harness. Great Value Pack — Comes as a set of 2 sockets, ideal for replacing both headlight connectors at the same time. Specifications Item Name H4 / 9003 Headlight Socket Compatibility H4, 9003 bulbs (3-hole base) Material Ceramic + Copper Wire Gauge 16 AWG Cable Length ~10 cm / 3.94" Max Temperature Up to 1000°C Quantity 2 x H4 Sockets Country of Origin Made in China What's in the Box? 2 × H4 / 9003 Ceramic Wire Harness Sockets Note: Due to monitor color calibration differences, actual product color may vary slightly from images. Please allow minor measurement tolerances due to manual measurement. Learn more: FuelEconomy.gov driving efficiency guidance Frequently Asked Questions Q: Are these H4 9003 ceramic sockets compatible with my vehicle? A: These sockets are designed to fit any vehicle that uses standard H4 or 9003 headlight bulbs with a 3-hole base configuration. This covers a very wide range of cars, trucks, motorcycles, and other vehicles. We recommend checking your current headlight socket type before purchasing to confirm compatibility. Q: Why choose a ceramic socket over a standard plastic one? A: Standard plastic headlight sockets can warp, melt, or crack under the high operating temperatures of headlight bulbs. These ceramic sockets are rated to withstand up to 1000°C, making them significantly more durable and heat-resistant — helping to prevent connector failure and potential electrical issues over the long term. Q: How difficult is it to install these headlight wire harness sockets? A: Installation is straightforward for most DIYers with basic automotive wiring knowledge. Simply splice the 16-gauge leads into your existing headlight harness wiring, matching polarity as required. The 3-hole base plugs securely into compatible H4/9003 bulbs. If you are unsure about vehicle wiring, consulting a qualified auto electrician is recommended. Production & Packaging Notice To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.