Buick Model Ignition Coil 3340078J01, Compatible with 12632479/12618542/12590990/12610626

For Buick Excelle, Geely Emgrand, and other 1.5L/1.6L inline-four engines, OEM number 3340078J01 ignition coil uses high-purity copper windings and high-temperature epoxy sealing, better cooling and aging resistance than OEM parts; measured life extended by about 20%. Compatible with 12632479, 12618542, 12590990, 12610626; converts 12V low voltage to high-voltage pulses to drive spark plugs, effectively eliminating acceleration hesitation or idle jitter.