Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during exhaust manifold removal/installation are shown below.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
Replacement of air fuel ratio sensor (sensor 1) Gas leak from exhaust system is repaired	Perform Inspection After Repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [10/2022 - ]

WARNING:

To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

COMPONENTS (REMOVAL)

Fig 1: Exhaust Manifold Removal Components [08/2023 - ] (1 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	NO. 2 ENGINE UNDER COVER ASSEMBLY	51420	-	-	-
2	FRONT FLOOR COVER LH	58166A	See step 2	-	-
3	ENGINE UNDER COVER HEAT INSULATOR	51468B	See step 3	-	-

*A	for PHEV Model	*B	for HEV Model
*1	NO. 23 TRACTION BATTERY BRACKET	-	-
*a	for PHEV Model: x 7 for HEV Model: x 6	*b	for PHEV Model: x 1 for HEV Model: x 2

Fig 2: Exhaust Manifold Removal Components [08/2023 - ] (2 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
4	DRAIN ENGINE COOLANT (for Engine)	-	-	See step 4	-
5	FRONT EXHAUST PIPE ASSEMBLY	17410	See step 5	-	-

*A	for PHEV Model	*B	for HEV Model
•	Non-reusable part	-	-

Fig 3: Exhaust Manifold Removal Components [08/2023 - ] (3 Of 4)

Procedure		Part Name Code
6	WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY	-	-	-	-
7	OUTER COWL TOP PANEL SUB-ASSEMBLY	55701J	-	-	-

Fig 4: Exhaust Manifold Removal Components [08/2023 - ] (4 Of 4)

Procedure		Part Name Code
8	AIR FUEL RATIO SENSOR (for Sensor 1)	89467B	-	-	-
9	HEATER AND ACCESSORY SUB-ASSEMBLY	-	-	-	-
10	LIQUID TUBE SUB-ASSEMBLY A w/ DISCHARGE TUBE	-	See step 10	-	-
11	WIRE HARNESS CLAMP BRACKET	82715	See step 11	-	-
12	NO. 1 EXHAUST MANIFOLD HEAT INSULATOR	17167	See step 12	-	-
13	NO. 1 FRONT FLOOR HEAT INSULATOR	58151	See step 13	-	-
14	MANIFOLD STAY	17118	See step 14	-	-
15	EXHAUST MANIFOLD	17141	See step 15	-	-
16	EXHAUST MANIFOLD TO HEAD GASKET	17173	-	-	-
17	NO. 2 EXHAUST MANIFOLD HEAT INSULATOR	17168	-	-	-

*A	for PHEV Model	*B	for HEV Model
•	Non-reusable part	-	-