diff --git a/subsys/bluetooth/mesh/dfd_srv.c b/subsys/bluetooth/mesh/dfd_srv.c
index 4a395a175bd..1b640739e50 100644
--- a/subsys/bluetooth/mesh/dfd_srv.c
+++ b/subsys/bluetooth/mesh/dfd_srv.c
@@ -925,12 +925,34 @@ const struct bt_mesh_blob_srv_cb _bt_mesh_dfd_srv_blob_cb = {
 
 static int dfd_srv_init(const struct bt_mesh_model *mod)
 {
+	int err;
 	struct bt_mesh_dfd_srv *srv = mod->rt->user_data;
 
 	srv->mod = mod;
 
-	if (IS_ENABLED(CONFIG_BT_MESH_MODEL_EXTENSIONS)) {
-		bt_mesh_model_extend(mod, srv->upload.blob.mod);
+	const struct bt_mesh_model *blob_srv =
+		bt_mesh_model_find(bt_mesh_model_elem(mod), BT_MESH_MODEL_ID_BLOB_SRV);
+
+	if (blob_srv == NULL) {
+		LOG_ERR("Missing BLOB Srv.");
+		return -EINVAL;
+	}
+
+	/** BLOB client also shall be present on the same element, but it is already checked by
+	 * initiation of dfu client which we check here.
+	 */
+	const struct bt_mesh_model *dfu_cli =
+		bt_mesh_model_find(bt_mesh_model_elem(mod), BT_MESH_MODEL_ID_DFU_CLI);
+
+	if (dfu_cli == NULL) {
+		LOG_ERR("Missing FU Cli.");
+		return -EINVAL;
+	}
+
+	err = bt_mesh_model_extend(mod, srv->upload.blob.mod);
+
+	if (err) {
+		return err;
 	}
 
 	return 0;
diff --git a/subsys/bluetooth/mesh/dfu_cli.c b/subsys/bluetooth/mesh/dfu_cli.c
index f02b884d222..1c336b19d3d 100644
--- a/subsys/bluetooth/mesh/dfu_cli.c
+++ b/subsys/bluetooth/mesh/dfu_cli.c
@@ -963,17 +963,22 @@ const struct bt_mesh_model_op _bt_mesh_dfu_cli_op[] = {
 
 static int dfu_cli_init(const struct bt_mesh_model *mod)
 {
+	int err;
 	struct bt_mesh_dfu_cli *cli = mod->rt->user_data;
+	cli->mod = mod;
 
-	if (mod->rt->elem_idx != 0) {
-		LOG_ERR("DFU update client must be instantiated on first elem");
+	const struct bt_mesh_model *blob_cli =
+		bt_mesh_model_find(bt_mesh_model_elem(mod), BT_MESH_MODEL_ID_BLOB_CLI);
+
+	if (blob_cli == NULL) {
+		LOG_ERR("Missing BLOB Cli.");
 		return -EINVAL;
 	}
 
-	cli->mod = mod;
+	err = bt_mesh_model_extend(mod, cli->blob.mod);
 
-	if (IS_ENABLED(CONFIG_BT_MESH_MODEL_EXTENSIONS)) {
-		bt_mesh_model_extend(mod, cli->blob.mod);
+	if (err) {
+		return err;
 	}
 
 	k_sem_init(&cli->req.sem, 0, 1);
diff --git a/subsys/bluetooth/mesh/dfu_srv.c b/subsys/bluetooth/mesh/dfu_srv.c
index 0cb4b5e524e..694a812322c 100644
--- a/subsys/bluetooth/mesh/dfu_srv.c
+++ b/subsys/bluetooth/mesh/dfu_srv.c
@@ -440,6 +440,7 @@ const struct bt_mesh_model_op _bt_mesh_dfu_srv_op[] = {
 
 static int dfu_srv_init(const struct bt_mesh_model *mod)
 {
+	int err;
 	struct bt_mesh_dfu_srv *srv = mod->rt->user_data;
 
 	srv->mod = mod;
@@ -451,8 +452,18 @@ static int dfu_srv_init(const struct bt_mesh_model *mod)
 		return -EINVAL;
 	}
 
-	if (IS_ENABLED(CONFIG_BT_MESH_MODEL_EXTENSIONS)) {
-		bt_mesh_model_extend(mod, srv->blob.mod);
+	const struct bt_mesh_model *blob_srv =
+		bt_mesh_model_find(bt_mesh_model_elem(mod), BT_MESH_MODEL_ID_BLOB_SRV);
+
+	if (blob_srv == NULL) {
+		LOG_ERR("Missing BLOB Srv.");
+		return -EINVAL;
+	}
+
+	err = bt_mesh_model_extend(mod, srv->blob.mod);
+
+	if (err) {
+		return err;
 	}
 
 	return 0;
diff --git a/subsys/bluetooth/mesh/priv_beacon_srv.c b/subsys/bluetooth/mesh/priv_beacon_srv.c
index 93404a942ff..8dd1ba3b1d8 100644
--- a/subsys/bluetooth/mesh/priv_beacon_srv.c
+++ b/subsys/bluetooth/mesh/priv_beacon_srv.c
@@ -195,6 +195,7 @@ const struct bt_mesh_model_op bt_mesh_priv_beacon_srv_op[] = {
 
 static int priv_beacon_srv_init(const struct bt_mesh_model *mod)
 {
+	int err;
 	const struct bt_mesh_model *config_srv =
 		bt_mesh_model_find(bt_mesh_model_elem(mod), BT_MESH_MODEL_ID_CFG_SRV);
 
@@ -206,7 +207,11 @@ static int priv_beacon_srv_init(const struct bt_mesh_model *mod)
 	priv_beacon_srv = mod;
 	mod->keys[0] = BT_MESH_KEY_DEV_LOCAL;
 
-	bt_mesh_model_extend(mod, config_srv);
+	err = bt_mesh_model_extend(mod, config_srv);
+
+	if (err) {
+		return err;
+	}
 
 	return 0;
 }