Ford Focus 0-11 1.8L Ignition Coil 4W5G-12A366 Enhanced Ignition

This ignition coil is designed for Ford Focus 2000-2011 1.8L engines, perfectly matching 4-cylinder models including classic Focus and Mazda3 on same platform. Core function: convert low voltage to high voltage to ensure stable spark plug ignition, improving combustion efficiency and power response; enhanced design reduces misfire. OEM 4W5G-12A366 (corresponding 4W5G-12A366-BA). Cross-check stock via original system. Replacement difficulty: medium; professional technician recommended; be careful with high-voltage harness clips to avoid damage. This product is available with own-brand authorization, suitable for bulk purchases, reduces aftermarket returns, especially for high-use fleets.