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- Order number: 61014-08101
For the 4 series, 2G changes completely to variants with M18 thread. Nevertheless, the M14 variants will continue to be maintained and almost all development steps will be transferred to both types. The 2G 57-4 * spark plug is used in the area of the M14 variant - it is gradually replacing all previous variants. The spark plug is characterized by a further developed welding process, which leads to a long service life and prevents failures.