diff -r 7ba2940f7eb3 src/engine_type.h
--- a/src/engine_type.h	Thu Jun 23 17:45:06 2011 +0000
+++ b/src/engine_type.h	Fri Jun 24 18:35:54 2011 +0200
@@ -138,11 +138,12 @@
  * EngineInfo.misc_flags is a bitmask, with the following values
  */
 enum EngineMiscFlags {
-	EF_RAIL_TILTS = 0, ///< Rail vehicle tilts in curves
-	EF_ROAD_TRAM  = 0, ///< Road vehicle is a tram/light rail vehicle
-	EF_USES_2CC   = 1, ///< Vehicle uses two company colours
-	EF_RAIL_IS_MU = 2, ///< Rail vehicle is a multiple-unit (DMU/EMU)
-	EF_RAIL_FLIPS = 3, ///< Rail vehicle can be flipped in the depot
+	EF_RAIL_TILTS         = 0, ///< Rail vehicle tilts in curves
+	EF_ROAD_TRAM          = 0, ///< Road vehicle is a tram/light rail vehicle
+	EF_USES_2CC           = 1, ///< Vehicle uses two company colours
+	EF_RAIL_IS_MU         = 2, ///< Rail vehicle is a multiple-unit (DMU/EMU)
+	EF_RAIL_FLIPS         = 3, ///< Rail vehicle can be flipped in the depot
+	EF_NO_BREAKDOWN_SMOKE = 4, ///< Do not show black smoke during a breakdown
 };
 
 /**
diff -r 7ba2940f7eb3 src/vehicle.cpp
--- a/src/vehicle.cpp	Thu Jun 23 17:45:06 2011 +0000
+++ b/src/vehicle.cpp	Fri Jun 24 18:35:54 2011 +0200
@@ -1102,7 +1102,7 @@
 						(this->type == VEH_TRAIN ? SND_3A_COMEDY_BREAKDOWN_2 : SND_35_COMEDY_BREAKDOWN), this);
 				}
 
-				if (!(this->vehstatus & VS_HIDDEN)) {
+				if (!(this->vehstatus & VS_HIDDEN) && !HasBit(Engine::Get(this->engine_type)->flags, EF_NO_BREAKDOWN_SMOKE)) {
 					EffectVehicle *u = CreateEffectVehicleRel(this, 4, 4, 5, EV_BREAKDOWN_SMOKE);
 					if (u != NULL) u->animation_state = this->breakdown_delay * 2;
 				}