diff --git a/firmware/config/engines/mazda/mazda_miata_vvt.cpp b/firmware/config/engines/mazda/mazda_miata_vvt.cpp
index 900ce972c9..4e6c8abc3d 100644
--- a/firmware/config/engines/mazda/mazda_miata_vvt.cpp
+++ b/firmware/config/engines/mazda/mazda_miata_vvt.cpp
@@ -533,22 +533,6 @@ void setMazdaMiata2003EngineConfiguration() {
 	config->crankingFuelBins[7] = 90;
 }
 
-/**
- * red car setting with default 1991/1995 miata harness
- * board #70 - closer to default miata NA6 harness
- *
- */
-void setMazdaMiata2003EngineConfigurationBoardTest() {
-	setMazdaMiata2003EngineConfiguration();
-
-	engineConfiguration->ignitionPins[2] = Gpio::C7;
-
-	// Frankenso analog #7 pin 3J, W48 top <>W48 bottom jumper, not OEM. Make sure 500K pull-down on Frankenso
-	engineConfiguration->afr.hwChannel = EFI_ADC_3; // PA3
-
-	engineConfiguration->mafAdcChannel = EFI_ADC_4; // PA4 - W47 top <>W47
-}
-
 /**
  * https://github.com/rusefi/rusefi/wiki/HOWTO-TCU-A42DE-on-Proteus
  */
diff --git a/firmware/config/engines/mazda/mazda_miata_vvt.h b/firmware/config/engines/mazda/mazda_miata_vvt.h
index 6e232bc2cb..b70c008a36 100644
--- a/firmware/config/engines/mazda/mazda_miata_vvt.h
+++ b/firmware/config/engines/mazda/mazda_miata_vvt.h
@@ -17,7 +17,6 @@
  * set engine_type 47
  */
 void setMazdaMiata2003EngineConfiguration();
-void setMazdaMiata2003EngineConfigurationBoardTest();
 
 /**
  * https://github.com/rusefi/rusefi/wiki/Mazda-Miata-2001
diff --git a/firmware/controllers/algo/engine_configuration.cpp b/firmware/controllers/algo/engine_configuration.cpp
index 1597d1007e..bce1c2f0db 100644
--- a/firmware/controllers/algo/engine_configuration.cpp
+++ b/firmware/controllers/algo/engine_configuration.cpp
@@ -998,9 +998,7 @@ void resetConfigurationExt(configuration_callback_t boardCallback, engine_type_e
 	case engine_type_e::FRANKENSO_MAZDA_MIATA_2003:
 		setMazdaMiata2003EngineConfiguration();
 		break;
-	case engine_type_e::MAZDA_MIATA_2003_BOARD_TEST:
-		setMazdaMiata2003EngineConfigurationBoardTest();
-		break;
+	case engine_type_e::ET_UNUSED_55:
 	case engine_type_e::TEST_ENGINE_VVT:
 		setTestVVTEngineConfiguration();
 		break;
diff --git a/firmware/controllers/algo/engine_types.h b/firmware/controllers/algo/engine_types.h
index 66eee60ab3..a4fe743d25 100644
--- a/firmware/controllers/algo/engine_types.h
+++ b/firmware/controllers/algo/engine_types.h
@@ -136,7 +136,7 @@ enum class engine_type_e : uint16_t {
 	TEST_ISSUE_366_BOTH = 52,
 	TEST_ISSUE_366_RISE = 53,
 	MAVERICK_X3 = 54,
-	MAZDA_MIATA_2003_BOARD_TEST = 55,
+	ET_UNUSED_55 = 55,
 	FRANKENSO_MAZDA_MIATA_NA8 = 56,
 	HELLEN_HONDA_BCM = 57,
 	ETB_BENCH_ENGINE = 58,