Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Removal

REMOVAL

CAUTION / NOTICE / HINT

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

CAUTION / NOTICE / HINT

NOTICE:

Make sure to release vacuum from the brake booster assembly before removing the brake master cylinder sub-assembly from the brake booster assembly.

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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3. REMOVE BRAKE MASTER CYLINDER SUB-ASSEMBLY WITH WAY

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4. REMOVE FRONT DOOR SCUFF PLATE LH

w/o Rear No. 2 Seat: Click here

w/ Rear No. 2 Seat: Click here

5. REMOVE COWL SIDE TRIM BOARD LH

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6. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

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7. REMOVE FRONT WIPER MOTOR AND LINK ASSEMBLY

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8. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY

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9. REMOVE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY

(a) Disconnect the reservoir level switch connector and remove the bolt from the brake master cylinder reservoir assembly.

*1 Brake Master Cylinder Reservoir Assembly *2 Reservoir Bracket

(b) Move the brake master cylinder reservoir assembly as shown in the illustration to disengage the 2 claws, and remove it.

10. REMOVE RESERVOIR BRACKET

(a) Remove the 2 bolts and reservoir bracket.

11. DISCONNECT UNION TO CHECK VALVE HOSE

(a) w/o Rear Air Conditioning System:

(1) Slide the clip and disconnect the union to check valve hose from the brake booster assembly.

(2) Separate the union to check valve hose from the engine room main wire.

(b) w/ Rear Air Conditioning System:

(1) Slide the clip and disconnect the union to check valve hose from the brake booster assembly.

(2) Disengage the clamp and separate the union to check valve hose from the suction pipe sub-assembly.

12. SEPARATE ENGINE ROOM MAIN WIRE (for TMC Made)

(a) Disengage the 6 clamps to separate the engine room main wire.

(b) Disconnect the connector from the security horn assembly.

(c) Disconnect the connector from the vacuum warning switch assembly.

(d) Remove the bolt.

(e) Disengage the clamp and pin to separate the wire harness protector.

(f) Disengage the clamp.

(g) Remove the 3 bolts to separate the engine room relay block assembly.

13. SEPARATE ENGINE ROOM MAIN WIRE (for TMMC Made)

(a) Disengage the 6 clamps to separate the engine room main wire.

(b) w/ Security Horn Assembly: (1) Disconnect the connector from the security horn assembly.

(c) Disconnect the connector from the vacuum warning switch assembly.

(d) Remove the bolt.

(e) Disengage the clamp and pin to separate the wire harness protector.

(f) Disengage the clamp.

(g) Remove the 3 bolts to separate the engine room relay block assembly.

14. DISCONNECT FUEL VAPOR FEED HOSE ASSEMBLY

(a) Slide the clip and disconnect the fuel vapor feed hose assembly.

15. SEPARATE AIR CONDITIONING HOSE AND ACCESSORY (w/ Rear Air Conditioning System)

(a) Remove the nut and separate the air conditioning hose and accessory. NOTICE: Do not deform the refrigerant lines. Do not damage the clamp.

16. SEPARATE BRAKE LINE

(a) Disengage the brake tube clamp to separate the 2 brake lines. NOTICE: Do not kink or damage the brake lines. Do not damage the clamp.

17. REMOVE BRAKE PEDAL RETURN SPRING

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18. LOOSEN LOCK NUT

(a) Loosen the lock nut of the brake master cylinder push rod clevis.

*1 Lock Nut *2 Brake Master Cylinder Push Rod Clevis

19. REMOVE PUSH ROD PIN

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20. REMOVE BRAKE BOOSTER ASSEMBLY

(a) Remove the 4 nuts and push the brake booster assembly toward the engine compartment. NOTICE: Do not apply excessive force to the brake lines.

(b) Remove the brake master cylinder push rod clevis and lock nut from the brake booster assembly.

(c) Remove the brake booster assembly from the vehicle body.

NOTICE:

Do not apply excessive force to the brake lines.

21. REMOVE BRAKE BOOSTER GASKET