How to Check the Model Number of Toyota Spark Plugs?
1 Answers
To check the model number of Toyota spark plugs, look for the model marking on the ceramic part of the spark plug. The model number of a spark plug is typically arranged in the order of material, size, heat value, insulation characteristics, resistance, electrode shape, and gap. Each brand's spark plug model number is different. For example, in DENSO's IW16EXRU11, 'I' represents the material as iridium, 'W' indicates a spark plug diameter of 14 millimeters, '16' denotes the heat value (third level of heat resistance), 'E' stands for a thread length of 19 to 20 millimeters, 'X' signifies super insulation material, 'R' indicates the presence of resistance, 'U' represents the U-groove structure of the ignition electrode, and '11' denotes a spark plug gap of 11 millimeters.