diff --git a/src/mainboard/google/rex/variants/kanix/Makefile.mk b/src/mainboard/google/rex/variants/kanix/Makefile.mk
index 03a18360cd..3588744300 100644
--- a/src/mainboard/google/rex/variants/kanix/Makefile.mk
+++ b/src/mainboard/google/rex/variants/kanix/Makefile.mk
@@ -5,3 +5,4 @@ romstage-y += gpio.c
 ramstage-$(CONFIG_FW_CONFIG) += fw_config.c
 ramstage-y += gpio.c
 ramstage-y += ramstage.c
+ramstage-y += variant.c
diff --git a/src/mainboard/google/rex/variants/kanix/variant.c b/src/mainboard/google/rex/variants/kanix/variant.c
new file mode 100644
index 0000000000..85a908a846
--- /dev/null
+++ b/src/mainboard/google/rex/variants/kanix/variant.c
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/variants.h>
+#include <chip.h>
+#include <fw_config.h>
+#include <sar.h>
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	return get_wifi_sar_fw_config_filename(FW_CONFIG_FIELD(WIFI_TYPE));
+}
+
+void variant_update_soc_chip_config(struct soc_intel_meteorlake_config *config)
+{
+	config->cnvi_bt_audio_offload = true;
+}