Preheating Relay for Volvo S60 I, V70 II, XC 70 I, XC90 I A preheating relay, also called preheating box, is an essential electrical component in diesel engines. It plays a crucial role in starting in cold weather by ensuring optimal combustion of the air-fuel mixture. Number of connections For vehicles with right direction (RHD) For vehicles with steering on the left (LHD) hitachi :: 132174, 2502174 Volvo: 30751798, 31342687, 6901083, 8692859 Herth+Buss Elparts: 75614334 Meat & Doria: 7285696 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 XC70 I Cross Country 2401 CCM, 136 kW, 185 PS 2401 CCM, 136 kW, 185 PS 2401 CCM, 120 kW, 16.