darkheavens is right. and its a bundle of TWO in black rubber sleeves. one of them is toast. $42 at mazda or cheap at a junk yard. the relays are in metal tower to the left of the battery (looking from the front of the car).
mine: 93 ZE, clutchmaster clutch, fidanza flywheel, poly motor mounts, HS CAI, HS headers, ractive exhaust, F&R strut bars, ground controls on illuminas, SS clutch line, espec heads/corners and much much more!!
hers: 93 ZE. pretty much the same mods. + F&R drilled rotors, STS, h&r's