Premium Bosch iridium spark plug engineered for BYD Qin Plus DM-i, model years 2021–2025, with BYD472QA 1.5L hybrid (DM-i) engine. Specification: Iridium construction, 0.7 mm factory gap, M12×1.25 thread, 14 mm hex. OEM cross-reference: BYD 123801. Note: Specific Bosch part number not listed in the provided data; confirm by VIN/engine.