The new Bosch Iridium spark plug employs OE design, material and manufacturing techniques to offer an advanced, long-life spark plug for modern high-tech engines, the manufacturer said. The new spark plug has a continuous laser welded fine-wire iridium center electrode and a laser welded iridium-platinum inlaid, tapered ground electrode for top performance and durability, the company added. With 15 part numbers launched in June, the new spark plug will cover 71% of vehicles in operation. The program will be expanded in the coming months to include additional part numbers and vehicle coverage.