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 water inlet with thermostat sub-assembly 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 throttle body with motor assembly Cleaning the deposits from the throttle body with motor assembly Gas leak from exhaust system is repaired	Inspection After Repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [10/2022 - ]

NOTE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

Refer to PRECAUTION [10/2022 - ]

COMPONENTS (REMOVAL)

Fig 1: Thermostat Removal Components [08/2023 - ] (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	FRONT WHEEL OPENING EXTENSION PAD LH	53852B	-	-	-
2	FRONT WHEEL OPENING EXTENSION PAD RH	53851D	-	-	-
3	NO. 1 ENGINE UNDER COVER	51441	-	-	-
4	DRAIN ENGINE COOLANT (for Engine)	-	-	See step 4	-

Fig 2: Thermostat Removal Components [08/2023 - ] (2 Of 2)

Procedure		Part Name Code
5	INTAKE MANIFOLD	17111	-	-	-
6	NO. 2 RADIATOR HOSE	16572D	-	-	-
7	NO. 7 WATER BY-PASS HOSE	16295	See step 7	-	-
8	WATER INLET WITH THERMOSTAT SUB-ASSEMBLY	16031	See step 8	-	-

*1	GASKET	-	-
•	Non-reusable part	-	-