diff --git a/firmware/config/engines/bmw_m73.cpp b/firmware/config/engines/bmw_m73.cpp
index 7dc38222b1..69dc1bec2e 100644
--- a/firmware/config/engines/bmw_m73.cpp
+++ b/firmware/config/engines/bmw_m73.cpp
@@ -30,8 +30,8 @@
  * ECU pin 6:  GND             ECU
  * ECU pin 15: OUT         BLK injector #2
  * ECU pin 20: IN          WHT hall effect camshaft sensor signal
- * ECU pin 21: GND BRN     BLK CLT sensor
- * ECU pin 22: IN  RED/BRN GRN CLT sensor
+ * ECU pin 21: GND BRN     BLK CLT sensor (only on first ECU)
+ * ECU pin 22: IN  RED/BRN GRN CLT sensor (only on first ECU)
  * ECU pin 27: OUT         ORG injector #6
  * ECU pin 28: OUT         RED injector #5
  * ECU pin 32: IN          ORG VR positive crankshaft sensor - only 2x 5k per channel, R111 not installed, W1002 not installed
@@ -39,7 +39,7 @@
  * ECU pin 41: OUT BRN/WHT BLU injector #1
  * ECU pin 45: GND             crankshaft shield
  * ECU pin 46: IN  BLK     BLU VR negative crankshaft sensor
- *
+ * ECU pin 47: IN              IAT sensor (only on second ECU)
  *
  * Plug #4 40 pin
  * ECU pin 6:  IN              start signal from ignition key
diff --git a/firmware/config/engines/bmw_m73_mre.cpp b/firmware/config/engines/bmw_m73_mre.cpp
index 5e4e9c286a..99e7d01559 100644
--- a/firmware/config/engines/bmw_m73_mre.cpp
+++ b/firmware/config/engines/bmw_m73_mre.cpp
@@ -30,12 +30,16 @@
  * ECU pin 2:  OUT         ORG injector #4
  * ECU pin 6:  GND             ECU
  * ECU pin 15: OUT         ORG injector #2
+ * ECU pin 21: GND BRN     BLK CLT sensor (only on first ECU)
+ * ECU pin 22: IN  RED/BRN BLU CLT sensor (only on first ECU)
  * ECU pin 27: OUT         GRN injector #6
  * ECU pin 28: OUT         BLU injector #5
  * ECU pin 32: IN          WHT VR positive crankshaft sensor
+ * ECU pin 34: IN          IAT sensor (only on second ECU)
  * ECU pin 40: OUT BRN/BLK GRN injector #3
  * ECU pin 41: OUT BRN/WHT BLU injector #1
  * ECU pin 46: IN  BLK     BLU VR negative crankshaft sensor
+ * ECU pin 47: GND BRN     IAT sensor (only on second ECU)
  *
  * Plug #4 40 pin
  * ECU pin 6:  IN          ORG start signal from ignition key. Custom wiring: pulled-up thermistor wire on MRE