Spark plug Bosch W8DC for 518 from 07/1975 up (518 LHD 4625659 / 518 RHD 3820624) and for 518i+520/4+520i all years of manufacturing only for country version AUS, S, you need 4
0241229715 Bosch Spark Plug, Nickel for Audi, Bmw, Fiat, Renault, Toyota
Bosch - W8DC-6 - Spark Plugs - Set Of Six
Spark Plug Bosch W8DC :: Custom & Speed Parts (CSP)