The only vehicle that can make use of equipment modules is the spidertron.
Bonuses given by equipment modules stack and can be combined with each other to suit the wearer's personal preferences. Modules take up a certain amount of space in armor and some consume energy.
Modules will remain in the armor even if it is removed, stored or dropped on the ground. Modules will only function when the armor is equipped and will not recharge or deplete otherwise.
Equipment modules can be used by placing them in the grid that opens by right clicking the armor.