Electronic control unit for use in automotive vehicle

An electronic control unit comprising:

• a substantially box-shaped case having a bottom opening;
• a bottom cover for closing the bottom opening of the case;
• and
• a circuit board having electronic components mounted thereon, the circuit board being contained in a space formed by the case and the bottom cover, wherein:
• side stays extending to both sides of the bottom cover are formed integrally with the bottom cover;
• and
• a first rib extending to the substantially same direction to which the side stay extends is formed on each side stay.

A casing for an electronic control unit comprising:

• a case defining a bottom opening;
• a bottom cover for closing the bottom opening;
• a side stay formed integrally with the bottom cover and including an upwardly extending bent portion,
• wherein the bottom cover further comprises;
• a first rib formed on the side stay and that extends perpendicularly from a side of the bottom cover;
• and
• a second rib fanned on the side of the bottom cover so that the second rib is positioned inside the case when the bottom cover is connected to the case to close the bottom opening.