Brake master cylinder 2 Kreis D=23,81 for 518+520/4+520i up to 10/1977 only LHD-models only with Plug 22/8 no. 34311121911 (518 LHD 4668533 / 518A LHD 3840277 / 520/4 LHD 5367324 / 520A/4 LHD 4480230 / 520i LHD 4463559) and for 518 from 10/1977 up to 10/1978 only LHD-models (from 518 LHD 4668533 / 518A LHD 3840277 up to 518 LHD 4688104 / 518A LHD 3841175) and for 520/4+520i from 10/1977 up only LHD-models (520/4 LHD 5367324 / 520A/4 LHD 4480230 / 520i LHD 4463559), you need 1 for 1 car
Brake master cylinder D=22,20MM for 518 from 10/1978 up only LHD-models (518 LHD 4688104 / 518A LHD 3841175) and for 518i all years of manufacturing only for country version S, you need 1 for 1 car
Repair kit brake master cylinder D=22,20MM for 518 all years of manufacturing only LHD-models and for 518i all years of manufacturing only for country version S, you need 1 for 1 car, fits only for Brake master cylinder D=22,20MM no. 34311122145
Repair kit brake master cylinder D=23,81MM (with pistons and sealings) for 518, 520/4, 520i only LHD-models, all years of manufacturing, you need 1 for 1 car, fits only for Brake master cylinder 2 Kreis D=23,81 no. 34311120834
Repair kit for brake master cylinder 23.81 mm (no pistons, only sealings) for 518, 520i, 520/4 only LHD-models, up to 10/1977, you need 1 for 1 car. 2 plugs 22/8 mm are included, if you need 17/8 mm, please order separately. the part number is 34 31 1 103 205.