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Genuine original product Yuchai Engine Truck Spare Parts YC6G Repair Kit Engine Spark Plug M2A00-3705002A for YUTONG Bus Parts

The M2A00-3705002A is a high-efficiency ignition coil assembly engineered specifically for Yuchai’s series of CNG/LNG-powered engines, including the YC6G, YC6J, YC4G, and YC6MK platforms. As a core component of the engine's electronic ignition system, it delivers ultra-high voltage pulses to ignite the lean air-fuel mixture in natural gas engines — a critical function under challenging operating conditions such as high load, low speed, or steep gradients. Designed for direct cylinder mounting (pencil-type), this coil features vacuum-impregnated epoxy insulation and optimized magnetic circuitry to ensure reliable spark generation even at elevated temperatures. In the 2026 clean-energy commercial vehicle landscape, where CNG and LNG buses dominate urban transit fleets, the M2A00-3705002A plays an essential role in maintaining combustion efficiency, reducing misfires, and supporting emission compliance. It is widely used across major OEMs including Yutong, Kinglong, and Higer.
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  • M2A00-3705002A

  • Yutong Bus Parts

Attribute Description
Product Name Direct-Mount Ignition Coil Assembly (Pencil Type)
Model Number M2A00-3705002A
Primary Application Natural Gas (CNG/LNG) Engines
Engine Compatibility Yuchai YC6G, YC6J, YC4G, YC6MK Series
Vehicle Fitment Yutong, Kinglong, Higer – CNG/LNG City Buses & Shuttle Coaches
Mounting Style Spark Plug Well Insert (Top-mounted, No Spark Plug Wire Required)
Operating Voltage (Primary) 24V DC (Vehicle System Supply)
Output Type High-Voltage Pulse (≥30kV) for Spark Plug Ionization
Insulation Technology Vacuum-Potted with High-Grade Epoxy Resin
Environmental Protection Sealed against moisture, oil mist, and thermal stress
火花塞-2


火花塞-1


Parameter Value / Description
Part Number M2A00-3705002A
Primary Winding Resistance 0.5Ω – 1.2Ω (at 20°C, varies slightly by batch)
Secondary Output Voltage ≥ 30 kV (ensures reliable gap breakdown under lean-burn conditions)
Peak Energy Output ~85 mJ (millijoules) per stroke
Dielectric Strength Withstands > 40 kV AC (insulation integrity test)
Operating Temperature Range -40°C to +150°C (ambient); withstands head cover surface up to +200°C
Housing Material High-Temperature Thermoplastic + Heat-Resistant Reinforced Polymer
Connector Type (Low Voltage) Dedicated 2-pin plug-in connector (ECU signal controlled)
High-Voltage Interface Integrated rubber boot with spring contact (connects directly to spark plug terminal)
Life Expectancy > 120,000 km under normal operating conditions
Compliance Standards GB/T 24550, ISO 8855, ECE R10 (EMC), RoHS


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