diff --git a/src/saveload/vehicle_sl.cpp b/src/saveload/vehicle_sl.cpp
--- a/src/saveload/vehicle_sl.cpp
+++ b/src/saveload/vehicle_sl.cpp
@@ -680,6 +680,8 @@ public:
 		    SLE_VAR(Vehicle, breakdown_delay,       SLE_UINT8),
 		    SLE_VAR(Vehicle, breakdowns_since_last_service, SLE_UINT8),
 		    SLE_VAR(Vehicle, breakdown_chance,      SLE_UINT8),
+		 SLE_CONDVAR_X(Vehicle, breakdown_type,        SLE_UINT8, SL_MIN_VERSION, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_IMPROVED_BREAKDOWNS)),
+		 SLE_CONDVAR_X(Vehicle, breakdown_severity,    SLE_UINT8, SL_MIN_VERSION, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_IMPROVED_BREAKDOWNS)),
 		SLE_CONDVAR(Vehicle, build_year,            SLE_FILE_U8 | SLE_VAR_I32,    SL_MIN_VERSION,  SLV_31),
 		SLE_CONDVAR(Vehicle, build_year,            SLE_INT32,                   SLV_31, SL_MAX_VERSION),