diff --git a/firmware/controllers/algo/engine_configuration.cpp b/firmware/controllers/algo/engine_configuration.cpp
index 17ec57eca2..dba6748622 100644
--- a/firmware/controllers/algo/engine_configuration.cpp
+++ b/firmware/controllers/algo/engine_configuration.cpp
@@ -694,7 +694,6 @@ void resetConfigurationExt(configuration_callback_t boardCallback, engine_type_e
 	 * And override them with engine-specific defaults
 	 */
 	switch (engineType) {
-	case engine_type_e::HELLEN72_ETB:
 	case engine_type_e::MINIMAL_PINS:
 		// all basic settings are already set in prepareVoidConfiguration(), no need to set anything here
 		// nothing to do - we do it all in setBoardDefaultConfiguration
@@ -780,7 +779,6 @@ void resetConfigurationExt(configuration_callback_t boardCallback, engine_type_e
 	case engine_type_e::PROTEUS_E65_6H_MAN_IN_THE_MIDDLE:
 		setEngineProteusGearboxManInTheMiddle();
 		break;
-	case engine_type_e::PROTEUS_VAG_80_18T:
 	case engine_type_e::PROTEUS_N73:
 	case engine_type_e::PROTEUS_MIATA_NB2:
 		setMiataNB2_Proteus();
@@ -835,9 +833,6 @@ void resetConfigurationExt(configuration_callback_t boardCallback, engine_type_e
 	    setHellen121Vag_8_cyl();
         break;
 	case engine_type_e::HELLEN_121_VAG_4_CYL:
-	case engine_type_e::HELLEN_55_BMW:
-	case engine_type_e::HELLEN_88_BMW:
-	case engine_type_e::HELLEN_134_BMW:
 	case engine_type_e::HELLEN_154_VAG:
 		break;
 	case engine_type_e::HELLEN_154_HYUNDAI_COUPE_BK1:
diff --git a/firmware/controllers/algo/engine_types.h b/firmware/controllers/algo/engine_types.h
index 46e1278784..a7fb674b3b 100644
--- a/firmware/controllers/algo/engine_types.h
+++ b/firmware/controllers/algo/engine_types.h
@@ -94,7 +94,7 @@ enum class engine_type_e : uint32_t {
 
 	VW_ABA = 32,
 
-	HELLEN72_ETB = 33,
+	UNUSED_33 = 33,
 
 	HELLEN_NA6 = 34,
 
@@ -174,9 +174,9 @@ enum class engine_type_e : uint32_t {
 
 	HELLEN_121_VAG_4_CYL = 71,
 	HELLEN_121_NISSAN_6_CYL = 72,
-	HELLEN_55_BMW = 73,
-	HELLEN_88_BMW = 74,
-	HELLEN_134_BMW = 75,
+	UNUSED_73 = 73,
+	UNUSED_74 = 74,
+	UNUSED_75 = 75,
 	HELLEN_154_VAG = 76,
 
 	HELLEN_121_VAG_5_CYL = 77,
@@ -206,7 +206,7 @@ enum class engine_type_e : uint32_t {
 
 	PROTEUS_HONDA_OBD2A = 91,
 
-	PROTEUS_VAG_80_18T = 92,
+	UNUSED_92 = 92,
 
 	PROTEUS_N73 = 93,