Oil temperature control assembly fluidically connectable to an oil circulation system of an operating group of a vehicle, such as a motor or drive group, and to a cooling system of said operating group or of said vehicle, wherein the oil temperature control assembly identifies a vertical axis (Z-Z) and two longitudinal axes (X-X; Y-Y) lying mutually orthogonal to each other on a same main imaginary plane orthogonal to said vertical axis (Z-Z), wherein said assembly comprises: a) a heat exchanger comprising a plurality of plate-like exchanger elements superposed along the vertical axis (Z-Z) to define mutually alternated ducts through which cooling oil and liquid flow; b) an oil control and support device comprising: - a basic element substantially plate-shaped presenting a first surface in contact and engageable by the heat exchanger and a second surface opposite the first, wherein on said base element an inlet mouth of the oil towards the heat exchanger, and an outlet mouth configured to allow communication of the oil towards the operating group are made, wherein in said base element, an inlet duct extends from said inlet mouth towards the heat exchanger and an outlet duct extends to the outlet mouth; - a control group comprising: i) a housing body projecting in height starting from the first surface along the axis (Z-Z) next to the heat exchanger in which said housing body has a housing cavity fluidically connected to said inlet mouth and to said outlet mouth and to an exchanger duct; ii) a valve member housed in said housing cavity comprising an obturator element and a control element which moves the obturator element according to the operating conditions of the oil flowing inside said cavity wherein depending on the position of the obturator element the flow of oil in input to the outlet mouth and/or towards the exchanger duct is controlled. a) a heat exchanger comprising a plurality of plate-like exchanger elements superposed along the vertical axis (Z-Z) to define mutually alternated ducts through which cooling oil and liquid flow; b) an oil control and support device comprising: - a basic element substantially plate-shaped presenting a first surface in contact and engageable by the heat exchanger and a second surface opposite the first, wherein on said base element an inlet mouth of the oil towards the heat exchanger, and an outlet mouth configured to allow communication of the oil towards the operating group are made, wherein in said base element, an inlet duct extends from said inlet mouth towards the heat exchanger and an outlet duct extends to the outlet mouth; - a control group comprising: i) a housing body projecting in height starting from the first surface along the axis (Z-Z) next to the heat exchanger in which said housing body has a housing cavity fluidically connected to said inlet mouth and to said outlet mouth and to an exchanger duct; ii) a valve member housed in said housing cavity comprising an obturator element and a control element which moves the obturator element according to the operating conditions of the oil flowing inside said cavity wherein depending on the position of the obturator element the flow of oil in input to the outlet mouth and/or towards the exchanger duct is controlled. - a basic element substantially plate-shaped presenting a first surface in contact and engageable by the heat exchanger and a second surface opposite the first, wherein on said base element an inlet mouth of the oil towards the heat exchanger, and an outlet mouth configured to allow communication of the oil towards the operating group are made, wherein in said base element, an inlet duct extends from said inlet mouth towards the heat exchanger and an outlet duct extends to the outlet mouth; - a control group comprising: i) a housing body projecting in height starting from the first surface along the axis (Z-Z) next to the heat exchanger in which said housing body has a housing cavity fluidically connected to said inlet mouth and to said outlet mouth and to an exchanger duct; ii) a valve member housed in said housing cavity comprising an obturator element and a control element which moves the obturator element according to the operating conditions of the oil flowing inside said cavity wherein depending on the position of the obturator element the flow of oil in input to the outlet mouth and/or towards the exchanger duct is controlled. i) a housing body projecting in height starting from the first surface along the axis (Z-Z) next to the heat exchanger in which said housing body has a housing cavity fluidically connected to said inlet mouth and to said outlet mouth and to an exchanger duct; ii) a valve member housed in said housing cavity comprising an obturator element and a control element which moves the obturator element according to the operating conditions of the oil flowing inside said cavity wherein depending on the position of the obturator element the flow of oil in input to the outlet mouth and/or towards the exchanger duct is controlled.