diff --git a/firmware/config/boards/prometheus/efifeatures.h b/firmware/config/boards/prometheus/efifeatures.h
index 5b6024734a..86b3d1a0b1 100644
--- a/firmware/config/boards/prometheus/efifeatures.h
+++ b/firmware/config/boards/prometheus/efifeatures.h
@@ -32,9 +32,6 @@
 #undef EFI_USB_SERIAL
 #define EFI_USB_SERIAL FALSE
 
-#undef MMC_CARD_SPI
-#define MMC_CARD_SPI SPID1
-
 #define ADC_CHANNEL_VREF ADC_CHANNEL_IN14
 
 #undef PRIMARY_UART_DMA_MODE
diff --git a/firmware/config/boards/subaru_eg33/efifeatures.h b/firmware/config/boards/subaru_eg33/efifeatures.h
index 54caadde50..08509f49b8 100644
--- a/firmware/config/boards/subaru_eg33/efifeatures.h
+++ b/firmware/config/boards/subaru_eg33/efifeatures.h
@@ -84,8 +84,7 @@
 #undef EFI_FUEL_PUMP
 #define EFI_FUEL_PUMP				TRUE
 
-#undef MMC_CARD_SPI
-#define MMC_CARD_SPI				SPID1
+#define EFI_SDC_DEVICE				SDCD2
 
 #define ADC_CHANNEL_VREF			ADC_CHANNEL_IN14
 
diff --git a/firmware/hw_layer/mmc_card.cpp b/firmware/hw_layer/mmc_card.cpp
index c6a982511b..c18fe3f0ad 100644
--- a/firmware/hw_layer/mmc_card.cpp
+++ b/firmware/hw_layer/mmc_card.cpp
@@ -78,6 +78,7 @@ spi_device_e mmcSpiDevice = SPI_NONE;
 
 static THD_WORKING_AREA(mmcThreadStack, 3 * UTILITY_THREAD_STACK_SIZE);		// MMC monitor thread
 
+#if HAL_USE_MMC_SPI
 /**
  * MMC driver instance.
  */
@@ -85,6 +86,7 @@ MMCDriver MMCD1;
 
 /* MMC/SD over SPI driver configuration.*/
 static MMCConfig mmccfg = { NULL, &mmc_ls_spicfg, &mmc_hs_spicfg };
+#endif /* HAL_USE_MMC_SPI */
 
 /**
  * fatfs MMC/SPI
@@ -310,8 +312,15 @@ static void mmcUnMount(void) {
 	}
 	f_close(&FDLogFile);						// close file
 	f_sync(&FDLogFile);							// sync ALL
+
+#if HAL_USE_MMC_SPI
 	mmcDisconnect(&MMCD1);						// Brings the driver in a state safe for card removal.
 	mmcStop(&MMCD1);							// Disables the MMC peripheral.
+#endif
+#ifdef EFI_SDC_DEVICE
+	sdcDisconnect(&EFI_SDC_DEVICE);
+	sdcStop(&EFI_SDC_DEVICE);
+#endif
 	f_mount(NULL, 0, 0);						// FATFS: Unregister work area prior to discard it
 	memset(&FDLogFile, 0, sizeof(FIL));			// clear FDLogFile
 	setSdCardReady(false);						// status = false
@@ -343,6 +352,7 @@ void onUsbConnectedNotifyMmcI() {
 
 #endif /* HAL_USE_USB_MSD */
 
+#if HAL_USE_MMC_SPI
 /*
  * Attempts to initialize the MMC card.
  * Returns a BaseBlockDevice* corresponding to the SD card if successful, otherwise nullptr.
@@ -377,8 +387,32 @@ static BaseBlockDevice* initializeMmcBlockDevice() {
 	}
 
 	UNLOCK_SD_SPI;
-	return (BaseBlockDevice*)&MMCD1;
+	return reinterpret_cast<BaseBlockDevice*>(&MMCD1);
 }
+#endif /* HAL_USE_MMC_SPI */
+
+// Some ECUs are wired for SDIO/SDMMC instead of SPI
+#ifdef EFI_SDC_DEVICE
+static const SDCConfig sdcConfig = {
+	SDC_MODE_4BIT
+};
+
+static BaseBlockDevice* initializeMmcBlockDevice() {
+	if (!CONFIG(isSdCardEnabled)) {
+		return nullptr;
+	}
+
+	sdcStart(&EFI_SDC_DEVICE, &sdcConfig);
+	sdStatus = SD_STATE_CONNECTING;
+	if (sdcConnect(&EFI_SDC_DEVICE) != HAL_SUCCESS) {
+		sdStatus = SD_STATE_NOT_CONNECTED;
+		warning(CUSTOM_OBD_MMC_ERROR, "Can't connect or mount MMC/SD");
+		return nullptr;
+	}
+
+	return reinterpret_cast<BaseBlockDevice*>(&EFI_SDC_DEVICE);
+}
+#endif /* EFI_SDC_DEVICE */
 
 // Initialize and mount the SD card.
 // Returns true if the filesystem was successfully mounted for writing.
diff --git a/firmware/hw_layer/ports/rusefi_halconf.h b/firmware/hw_layer/ports/rusefi_halconf.h
index f3213e5a95..ba416348b4 100644
--- a/firmware/hw_layer/ports/rusefi_halconf.h
+++ b/firmware/hw_layer/ports/rusefi_halconf.h
@@ -13,8 +13,20 @@
 #define HAL_USE_USB EFI_USB_SERIAL
 #define HAL_USE_SERIAL_USB EFI_USB_SERIAL
 
-// If EFI_FILE_LOGGING, enable MMC SPI driver
-#define HAL_USE_MMC_SPI EFI_FILE_LOGGING
+// If EFI_FILE_LOGGING and SDC, enable SDIO/SDMMC driver
+#if defined(EFI_SDC_DEVICE) && EFI_FILE_LOGGING
+	#define HAL_USE_SDC TRUE
+	#define FATFS_HAL_DEVICE EFI_SDC_DEVICE
+#else
+	#define HAL_USE_SDC FALSE
+#endif
+
+// If EFI_FILE_LOGGING but not SDC, use SPI instead
+#if !defined(EFI_SDC_DEVICE) && EFI_FILE_LOGGING
+	#define HAL_USE_MMC_SPI TRUE
+#else
+	#define HAL_USE_MMC_SPI FALSE
+#endif
 
 // If USB and File logging, enable USB Mass Storage & community
 #define HAL_USE_USB_MSD (EFI_FILE_LOGGING && EFI_USB_SERIAL)
diff --git a/firmware/hw_layer/ports/stm32/stm32f7/cfg/mcuconf.h b/firmware/hw_layer/ports/stm32/stm32f7/cfg/mcuconf.h
index 18e7cf2a70..36ac024ddd 100644
--- a/firmware/hw_layer/ports/stm32/stm32f7/cfg/mcuconf.h
+++ b/firmware/hw_layer/ports/stm32/stm32f7/cfg/mcuconf.h
@@ -145,13 +145,17 @@
  * SDC driver system settings.
  */
 #define STM32_SDC_USE_SDMMC1                FALSE
+#define STM32_SDC_USE_SDMMC2                TRUE
 #define STM32_SDC_SDMMC_UNALIGNED_SUPPORT   TRUE
 #define STM32_SDC_SDMMC_WRITE_TIMEOUT       1000
 #define STM32_SDC_SDMMC_READ_TIMEOUT        1000
 #define STM32_SDC_SDMMC_CLOCK_DELAY         10
 #define STM32_SDC_SDMMC1_DMA_STREAM         STM32_DMA_STREAM_ID(2, 3)
+#define STM32_SDC_SDMMC2_DMA_STREAM         STM32_DMA_STREAM_ID(2, 0)
 #define STM32_SDC_SDMMC1_DMA_PRIORITY       3
+#define STM32_SDC_SDMMC2_DMA_PRIORITY       3
 #define STM32_SDC_SDMMC1_IRQ_PRIORITY       9
+#define STM32_SDC_SDMMC2_IRQ_PRIORITY       9
 
 #include "mcuconf_common_f4_f7.h"