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Modern automotive ignition coils for 2026 are being manufactured with advanced high-temperature composites, including epoxy resin systems and thermoplastic polyimide formulations that can withstand continuous exposure to underhood temperatures exceeding 150°C. These materials improve dielectric strength, thermal cycling resistance, and long-term durability. In parallel, manufacturers are aligning with IATF 16949 and SAE standards to ensure consistent process control, traceability, and reliability in high-voltage ignition systems. Typical validation tests include thermal shock, vibration, and partial discharge testing to meet the stricter demands of turbocharged and hybrid powertrains.