diff --git a/firmware/config/boards/hellen/hellen121nissan/prepend.txt b/firmware/config/boards/hellen/hellen121nissan/prepend.txt
index 84041b9b71..71acd23143 100644
--- a/firmware/config/boards/hellen/hellen121nissan/prepend.txt
+++ b/firmware/config/boards/hellen/hellen121nissan/prepend.txt
@@ -24,3 +24,4 @@
 #define show_Frankenso_presets false
 #define show_microRusEFI_presets false
 #define show_Proteus_presets false
+#define show_Hellen121nissan_presets true
diff --git a/firmware/integration/rusefi_config.txt b/firmware/integration/rusefi_config.txt
index 52f2e12335..bdf87815d0 100644
--- a/firmware/integration/rusefi_config.txt
+++ b/firmware/integration/rusefi_config.txt
@@ -507,7 +507,6 @@ end_struct
 #define ET_HELLEN_NB2 69
 
 #define ET_HELLEN_121_VAG 71
-#define ET_HELLEN_121_NISSAN 72 
 #define ET_HELLEN_121_NISSAN_6_CYL 72
 #define ET_HELLEN_55_BMW 73
 #define ET_HELLEN_88_BMW 74
@@ -525,6 +524,7 @@ end_struct
 #define ET_HELLEN_154_HYUNDAI 82
 #define ET_HELLEN_NB1 83
 #define ET_HELLEN_121_NISSAN_4_CYL 84
+#define ET_HELLEN_121_NISSAN_4_CYL 85
 
 #define ET_PROTEUS_ANALOG_PWM_TEST 106
 #define ET_TEST_ROTARY 107
diff --git a/firmware/tunerstudio/rusefi.input b/firmware/tunerstudio/rusefi.input
index 79f4890170..b693ae034e 100644
--- a/firmware/tunerstudio/rusefi.input
+++ b/firmware/tunerstudio/rusefi.input
@@ -1772,6 +1772,10 @@ cmd_set_engine_type_ET_MRE_M111						= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_
 cmd_set_engine_type_hellen_NA6						= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_NA6_16_hex@@"
 cmd_set_engine_type_hellen_NA94						= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_NA94_16_hex@@"
 
+cmd_set_engine_type_hellen_nissan_121_4		    	= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_121_NISSAN_4_CYL_16_hex@@"
+cmd_set_engine_type_hellen_nissan_121_6		    	= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_121_NISSAN_6_CYL_16_hex@@"
+cmd_set_engine_type_hellen_nissan_121_8		    	= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_121_NISSAN_8_CYL_16_hex@@"
+
 cmd_set_engine_type_hellen_121_vag_4				= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_121_VAG_16_hex@@"
 cmd_set_engine_type_hellen_121_vag_5				= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_121_VAG_5_CYL_16_hex@@"
 cmd_set_engine_type_hellen_121_vag_v6				= "@@TS_IO_TEST_COMMAND_char@@\x00\x30@@ET_HELLEN_121_VAG_V6_CYL_16_hex@@"
@@ -3557,6 +3561,10 @@ cmd_set_engine_type_default					= "@@TS_IO_TEST_COMMAND_char@@\x00\x31\x00\x00"
 		commandButton = "Hellen NA6",				cmd_set_engine_type_hellen_NA6@@if_show_HellenNA6_presets
 		commandButton = "Hellen NA8 94-95",			cmd_set_engine_type_hellen_NA94@@if_show_HellenNA6_presets
 
+		commandButton = "Hellen Nissan 4 cylinder",			cmd_set_engine_type_hellen_nissan_121_4@@if_show_Hellen121nissan_presets
+		commandButton = "Hellen Nissan 6 cylinder",			cmd_set_engine_type_hellen_nissan_121_6@@if_show_Hellen121nissan_presets
+		commandButton = "Hellen Nissan 8 cylinder",			cmd_set_engine_type_hellen_nissan_121_8@@if_show_Hellen121nissan_presets
+
 		commandButton = "Hellen 121 VAG i4",			cmd_set_engine_type_hellen_121_vag_4@@if_show_Hellen121vag_presets
 		commandButton = "Hellen 121 VAG i5",			cmd_set_engine_type_hellen_121_vag_5@@if_show_Hellen121vag_presets
 		commandButton = "Hellen 121 VAG v6",			cmd_set_engine_type_hellen_121_vag_v6@@if_show_Hellen121vag_presets