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 air fuel ratio sensor 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 2) Gas leak from exhaust system is repaired	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 pipe or other high temperature components while the engine is hot.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

COMPONENTS (REMOVAL)

Fig 1: Air Fuel Ratio Sensor (For Sensor 2) Removal Components [08/2023 - ]

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	-	-
4	AIR FUEL RATIO SENSOR	89467C	See step 4	-	-

*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