✔Compatible with: For 2005-2011 Ford Focus 2.0L L4 丨2003-2007 Ford Focus 2.3L L4丨2007-2011 Ford Focus 2.5L L5丨2005-2008 Ford Escape 2.3L L4丨2009-2012 Ford EcoSport 2.0L L4丨2010-2013 Ford Transit Connect 2.0L L4丨2011-2012 Ford Transit Connect ELECTRIC. For 2004-2005 Mazda 3 2.0L L4 丨2004-2005 Mazda 3 2.3L L4丨2005 Mazda 6 2.3L L4丨2005-2008 Mazda Tribute 2.3L L4. For 2005-2008 Mercury Mariner 2.3L L4. Please see the second main picture for more vehicles before purchase. | ✔Excellent Function: A faulty ignition coil & spark plug may result in engine misfire, rough engine idle, decrease in power, poor fuel economy etc. Every component either matches or improves on the OE design to ensure fast and easy installation with superior performance and reliability, to provide superior cold-start performance and a smoother running engine. | ✔High-quality: The spark plug is double iridium spark plug, have a much longer working life, can work 100000 kilometers, consistent and stable spark. The ignition coil made of premium quality materials, stainless-steel spring with internal ferrite noise suppressor prevents radiofrequencyinterference, advanced thermoplastic coilconnector ensures proper connectionand resists fractures causedby heat and thermai cycling, to better transfer the high voltage created by the engine‘s spark plug. | ✔OE# UF621&SP530. Replace# DG-507, DG-541, C-1453, 1453, F584, E417, 52-1783, IC517,19145831 4M5Z-12029-B, 4M5Z-12029-BA, 4M5Z-12029-BB, 4M5Z-12029-BC, LF16-18-100B C1453, F584, 5C1443, E417, 52-1783, IC517, DQ50132 DG507, DG541, C1453, 19145831, LF16-18-100B 9E5Z-12029-A . Package included: Ignition Coil Packs x4, Double Iridium Spark Plug x4. Not included instruction manual, easy to install. | ✔After-Sales Service: We offer 24 hours customer service and 1 year product service, If you are encounter product installation, product quality and other problems, please feel free to contact us.