BMW Water-Oil Separator Part code Part model Part name 1161 7501 566 E46/39/60/65/8 Water Oil Separator 1161 7503 520 E90/81/Z485/83 Oil separator 1161 7508 541 E53 Water Oil Separator 1161 7531 423 E90/60/65/85 Oil separators | Mercedes-Benz Water-Oil Separator Part code Part model Part name 272 010 06 31 M272/273 Oil Separator |