NGK 3123A Spark Plug

The NGK 3123A Spark Plug is a replacement engine ignition or starting-aid component that supports controlled combustion by providing the specified spark or pre-heating function. Its catalogue specification records 18 mm spanner size, M12 x 1,25 thread size, 19 mm thread length, and Connector Type M4, Nickel Middle Electrode, and 1 - Earthed Electrode spark plug. Use Ngk reference 100151 when cross-checking the part. Confirm the reference, electrical rating, thread or connector details and engine application before fitting; use the specified installation torque and test procedure.