diff --git a/src/math/Kconfig b/src/math/Kconfig
index b97f87bfe781..191ae7906b7a 100644
--- a/src/math/Kconfig
+++ b/src/math/Kconfig
@@ -178,8 +178,16 @@ config MATH_FIR
 	  filter calculates a convolution of input PCM sample and a configurable
 	  impulse response.
 
+config MATH_IIR
+	tristate "Select IIR filter library build method"
+	default m if LIBRARY_DEFAULT_MODULAR
+	default y
+	help
+	  A helper option for MATH_IIR_DF2T and MATH_IIR_DF1
+
 config MATH_IIR_DF2T
 	bool "IIR DF2T filter library"
+	depends on MATH_IIR != "n"
 	default n
 	help
 	  Select this to build IIR (Infinite Impulse Response) filter
@@ -187,6 +195,7 @@ config MATH_IIR_DF2T
 
 config MATH_IIR_DF1
 	bool "IIR DF1 filter library"
+	depends on MATH_IIR != "n"
 	default n
 	help
 	  Select this to build IIR (Infinite Impulse Response) filter
diff --git a/src/math/fir_llext/CMakeLists.txt b/src/math/fir_llext/CMakeLists.txt
index 9b8d2531bea3..79e732c46101 100644
--- a/src/math/fir_llext/CMakeLists.txt
+++ b/src/math/fir_llext/CMakeLists.txt
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 sof_llext_build("fir"
-	SOURCES ../fir_common.c
+	SOURCES fir_common.c
 		../fir_generic.c
 		../fir_hifi2ep.c
 		../fir_hifi3.c
diff --git a/src/math/fir_common.c b/src/math/fir_llext/fir_common.c
similarity index 100%
rename from src/math/fir_common.c
rename to src/math/fir_llext/fir_common.c
diff --git a/src/math/iir.toml b/src/math/iir.toml
new file mode 100644
index 000000000000..145488fcccc9
--- /dev/null
+++ b/src/math/iir.toml
@@ -0,0 +1,6 @@
+	[[module.entry]]
+	name = "IIR"
+	uuid = "B0CDCD9E-EF8B-404F-8480-0F287FC9D44D"
+	load_type = "3"
+
+	index = __COUNTER__
diff --git a/src/math/iir_llext/CMakeLists.txt b/src/math/iir_llext/CMakeLists.txt
new file mode 100644
index 000000000000..e3d346cea2e2
--- /dev/null
+++ b/src/math/iir_llext/CMakeLists.txt
@@ -0,0 +1,21 @@
+# Copyright (c) 2024 Intel Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+if(CONFIG_MATH_IIR_DF1)
+set(df1 ../iir_df1.c ../iir_df1_generic.c ../iir_df1_hifi3.c ../iir_df1_hifi4.c ../iir_df1_hifi5.c)
+else()
+set(df1 "")
+endif()
+
+if(CONFIG_MATH_IIR_DF2T)
+set(df2t ../iir_df2t.c ../iir_df2t_generic.c ../iir_df2t_hifi3.c)
+else()
+set(df2t "")
+endif()
+
+if(CONFIG_MATH_IIR_DF1 OR CONFIG_MATH_IIR_DF2T)
+sof_llext_build("iir"
+	SOURCES iir.c ${df1} ${df2t}
+	LIB openmodules
+)
+endif()
diff --git a/src/math/iir_llext/iir.c b/src/math/iir_llext/iir.c
new file mode 100644
index 000000000000..7891bd8fc5b1
--- /dev/null
+++ b/src/math/iir_llext/iir.c
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright(c) 2025 Intel Corporation.
+
+/* modular: llext dynamic link */
+
+#include <sof/compiler_attributes.h>
+#include <sof/lib/uuid.h>
+#include <module/module/api_ver.h>
+#include <module/module/llext.h>
+#include <rimage/sof/user/manifest.h>
+
+static const struct sof_man_module_manifest mod_manifest[] __section(".module") __used = {
+	SOF_LLEXT_AUX_MANIFEST("IIR", NULL, SOF_REG_UUID(iir)),
+};
+
+SOF_LLEXT_BUILDINFO;
diff --git a/src/math/iir_llext/llext.toml.h b/src/math/iir_llext/llext.toml.h
new file mode 100644
index 000000000000..89669daea077
--- /dev/null
+++ b/src/math/iir_llext/llext.toml.h
@@ -0,0 +1,5 @@
+#include <tools/rimage/config/platform.toml>
+#include "../iir.toml"
+
+[module]
+count = __COUNTER__
diff --git a/uuid-registry.txt b/uuid-registry.txt
index f06a9f259a1c..a1459f37bd67 100644
--- a/uuid-registry.txt
+++ b/uuid-registry.txt
@@ -83,6 +83,7 @@ b780a0a6-269f-466f-b47723dfa05af758 google_rtc_audio_processing
 a5dacb0e-88dc-415c-a1b53e8df77f1976 idc_cmd_task
 b90f5a4e-5537-4375-a1df95485472ff9e idc_task
 696ae2bc-2877-11eb-adc10242ac120002 igo_nr
+b0cdcd9e-ef8b-404f-84800f287fc9d44d iir
 fa00558c-d653-4851-a03ab21f125a9524 interrupt
 2f520e85-49ba-4284-90d83def24af313b intc_mt8196
 be60f97d-78df-4796-a0ee435cb56b720a ipc
diff --git a/zephyr/CMakeLists.txt b/zephyr/CMakeLists.txt
index 567c03e5e5df..9c29c3758d7f 100644
--- a/zephyr/CMakeLists.txt
+++ b/zephyr/CMakeLists.txt
@@ -697,19 +697,25 @@ elseif(CONFIG_MATH_FIR)
 	)
 endif()
 
-zephyr_library_sources_ifdef(CONFIG_MATH_IIR_DF1
-	${SOF_MATH_PATH}/iir_df1_generic.c
-	${SOF_MATH_PATH}/iir_df1_hifi3.c
-	${SOF_MATH_PATH}/iir_df1_hifi4.c
-	${SOF_MATH_PATH}/iir_df1_hifi5.c
-	${SOF_MATH_PATH}/iir_df1.c
-)
+if(CONFIG_MATH_IIR STREQUAL "m")
+	add_subdirectory(${SOF_MATH_PATH}/iir_llext
+			 ${PROJECT_BINARY_DIR}/iir_llext)
+	add_dependencies(app fir)
+elseif(CONFIG_MATH_IIR)
+	zephyr_library_sources_ifdef(CONFIG_MATH_IIR_DF1
+		${SOF_MATH_PATH}/iir_df1_generic.c
+		${SOF_MATH_PATH}/iir_df1_hifi3.c
+		${SOF_MATH_PATH}/iir_df1_hifi4.c
+		${SOF_MATH_PATH}/iir_df1_hifi5.c
+		${SOF_MATH_PATH}/iir_df1.c
+	)
 
-zephyr_library_sources_ifdef(CONFIG_MATH_IIR_DF2T
-	${SOF_MATH_PATH}/iir_df2t_generic.c
-	${SOF_MATH_PATH}/iir_df2t_hifi3.c
-	${SOF_MATH_PATH}/iir_df2t.c
-)
+	zephyr_library_sources_ifdef(CONFIG_MATH_IIR_DF2T
+		${SOF_MATH_PATH}/iir_df2t_generic.c
+		${SOF_MATH_PATH}/iir_df2t_hifi3.c
+		${SOF_MATH_PATH}/iir_df2t.c
+	)
+endif()
 
 if(CONFIG_COMP_ASRC STREQUAL "m")
 	add_subdirectory(${SOF_AUDIO_PATH}/asrc/llext