PREHEATING RELAY FOR VOLVO S60 I, V70 II, XC 70 I,XC90 I A glow plug relay, also called a glow plug box, is a critical electrical component in diesel engines. It plays a crucial role in cold weather starting by ensuring optimum combustion of the air-fuel mixture. Refers to the number of pins or wires present on the electrical outlet. For vehicles with right-hand drive (RHD) For vehicles with left-hand drive (LHD) hitachi : 132174, 2502174 VOLVO: 30751798, 31342687, 6901083, 8692859 HERTH+BUSS ELPARTS: 75614334 WILMINK GROUP: WG1484371, WG2016159 2400 ccm, 93 KW, 126 PS 2401 ccm, 136 KW, 185 PS 2400 ccm, 93 KW, 126 PS 2401 ccm, 96 KW, 131 PS 2401 ccm, 120 KW, 163 PS 2401 ccm, 136 KW, 185 PS 2401 ccm, 120 KW, 163 PS 2401 ccm, 136 KW, 185 PS 2401 ccm, 136 KW, 185 PS 2401 ccm, 120 KW, 163 PS.