Toyota Corolla spark plug is an electric iridium platinum spark plug. Corolla with spark plug models of SC20HR 1 1, 08 to 17 are all of this type. The price of Corolla spark plug in 4S shop is 480 yuan, and the replacement time is 150 yuan. Online shopping is generally around 300 yuan, and the replacement cycle of Corolla spark plug is 10.
Denso iridium spark plug, formerly called Denso iridium spark plug. It is the main product of Denso in Japan. The ignition electrode diameter of 0.4 is the thinnest in the world, which requires low ignition voltage, fuel saving and fast explosive force. It is a special spark plug designated by F 1 racing car and a supporting product of Toyota. Denso patented U-groove technology is the only one in the world, which increases the explosive power of ignition and makes the combustion more complete. Whether the spark plug needs to be replaced, just take it down and check it to see the burning color, the gap between electrodes, the gap between porcelain body and metal shell for air leakage and so on. If it is found that the car is difficult to start when it is cold, there is obvious frustration, idling jitter, or the acceleration performance of the engine decreases, it is necessary to check the spark plug in time.