Questions Covered in This Guide• Why is the vehicle model name alone not enough?• What does the engine code help confirm?• How do OE reference, model year, and engine code work together?• How can buye
Questions Covered in This Guide• What do with module and without module mean in ignition coil design?• What is the structural difference?• How do installation and matching requirements differ?• Why mu
Questions Covered in This Guide• What is the basic difference between 3-pin and 4-pin ignition coils?• What does the connector difference usually mean?• Can 3-pin and 4-pin ignition coils replace each
Questions Covered in This Guide• What is the difference between gasket seat and tapered seat?• How does the sealing logic work?• What risks come from choosing the wrong seat type?• Why can seat type n
Questions Covered in This Guide• How should buyers read common spark plug specifications?• What do heat range, thread, reach, seat, and gap actually mean?• How should material information be understoo
Questions Covered in This Guide• What are thread size, reach, and seat type?• What do new buyers confuse most often?• Why can spark plugs that look similar still not be interchangeable?• How should th
Questions Covered in This Guide• What is spark plug reach?• What problems can happen if the reach is wrong?• How does reach relate to combustion chamber position?• Why is reach not the same as thread
Questions Covered in This Guide• What is spark plug gap?• What problems can happen if the gap is too large or too small?• How does spark plug gap affect cold start, idle, and misfire?• Why can spark p
Questions Covered in This Guide• What is the difference between working with a direct factory and a trading company?• How does it affect quality control?• How does it affect price and lead time?• Why
Questions Covered in This Guide• What is the difference between OEM and private label ignition parts?• What type of buyers does each model suit?• What can be customized in logo, packaging, and labels?
Questions Covered in This Guide• Is the product hierarchy complete enough?• Are the technical parameters clear enough?• Are material consistency and product quality stable?• Does the supplier support
Questions Covered in This Guide• Is the supplier a real factory or mainly a trading company?• How should you judge production capacity?• How important is the quality control system?• Are the coverage
