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 EGR valve 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
Auxiliary battery terminal is disconnected/reconnected	Operate the multiplex network master switch assembly (retractable outer mirror switch) to extend and retract the outer rear view mirror assembly	Parking Support Brake System*	Refer to INITIALIZATION [10/2022 - ]
Replacement of hybrid motor control inverter assembly	Resolver learning	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration	for HEV Model: Refer to UTILITY [10/2022 - ] for PHEV Model: Refer to UTILITY [08/2023 - ]
Replacement of ECM	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [10/2022 - ]
	ECU configuration	-	Refer to ECU CONFIGURATION [10/2022 - ]
	Perform Vehicle Identification Number (VIN) or frame number registration	DTC is output	Refer to REGISTRATION [10/2022 - ]
Gas leak from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [10/2022 - ]

*: When "[Parking Support Brake System icon] System Stopped See Owner's Manual" is displayed on the multi-information display.

NOTE:

To prevent the key from being locked in the vehicle, make sure to enter e-latch inspection mode and enable the manual release handle before disconnecting the cable from the negative (-) auxiliary battery terminal.

Refer to INSPECTION MODE PROCEDURE [10/2022 - ]

HINT:

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

LEARNING COMPLETES WHEN VEHICLE IS DRIVEN

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Front Camera System	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.	Refer to INITIALIZATION [10/2022 - ]
Adaptive High Beam System
Lighting System (w/ Automatic Headlight Beam Level Control System)

LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Power Back Door System	Reset back door close position	Refer to INITIALIZATION [10/2022 - ]
Air Conditioning System	except PHEV Model: After the ignition switch is turned to ON, the servo motor standard position is recognized. for PHEV Model: After the ignition switch is turned to ON, the servo motor and cooler expansion valve standard position is recognized.	-

Effect/Inoperative Function when Necessary Procedure not Performed

Necessary Procedure

Link

Power Back Door System

Reset back door close position

Refer to INITIALIZATION [10/2022 - ]

Air Conditioning System

except PHEV Model:

After the ignition switch is turned to ON, the servo motor standard position is recognized.

for PHEV Model:

After the ignition switch is turned to ON, the servo motor and cooler expansion valve standard position is recognized.

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: EGR Valve Removal Components [08/2023 - ]

Procedure		Part Name Code
1	EGR COOLER ASSEMBLY	25680	-	-	-
2	NO. 1 FUEL VAPOR FEED HOSE	23826	-	-	-
3	NO. 2 FUEL VAPOR FEED HOSE	23827D	-	-	-
4	ENGINE WIRE	82121	-	-	-
5	NO. 1 EGR PIPE SUB-ASSEMBLY	25601	See step 5	-	-
6	EGR VALVE ADAPTER GASKET	25629	-	-	-
7	EGR INLET GASKET	25628	-	-	-
8	NO. 4 WATER BY-PASS HOSE	16281N	-	-	-
9	NO. 8 WATER BY-PASS HOSE	16296	-	-	-
10	EGR VALVE ASSEMBLY	25620	See step 10	-	-

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Non-reusable part