Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Installation

INSTALLATION

PROCEDURE

1. INSTALL BRAKE BOOSTER GASKET

(a) Install a new brake booster gasket to the brake booster assembly.

2. INSTALL BRAKE BOOSTER ASSEMBLY

(a) Temporarily install the brake booster assembly to the vehicle body.

NOTICE:

Do not apply excessive force to the brake lines.

(b) Temporarily install the lock nut and brake master cylinder push rod clevis to the brake booster assembly.

NOTICE:

Fully tighten the lock nut when adjusting the brake pedal height.

(c) Install the 4 nuts to secure the brake booster assembly.

Torque:

14 N·m {143 kgf·cm, 10 ft·lbf}

3. INSTALL PUSH ROD PIN

Click here

4. INSTALL BRAKE PEDAL RETURN SPRING

Click here

5. INSTALL BRAKE LINE

(a) Install the 2 brake lines to the brake tube clamp.

NOTICE:

  • Do not kink or damage the brake lines.
  • Do not damage the clamp.

6. INSTALL AIR CONDITIONING HOSE AND ACCESSORY (w/ Rear Air Conditioning System)

(a) Install the air conditioner tube and accessory assembly with the nut.

Torque:

9.8 N·m {100 kgf·cm, 87 in·lbf}

NOTICE:

  • Do not deform the refrigerant lines.
  • Do not damage the clamp.

7. CONNECT FUEL VAPOR FEED HOSE ASSEMBLY

(a) Connect the fuel vapor feed hose assembly, and slide the clip to secure it.

8. INSTALL ENGINE ROOM MAIN WIRE (for TMC Made)

(a) Install the engine room relay block assembly with the 3 bolts.

Torque:

8.35 N·m {85 kgf·cm, 74 in·lbf}

(b) Engage the clamp.

(c) Engage the clamp and pin to install the wire harness protector.

(d) Install the bolt to secure the wire harness protector.

Torque:

8.35 N·m {85 kgf·cm, 74 in·lbf}

(e) Connect the connector to the security horn assembly.

(f) Connect the connector to the vacuum warning switch assembly.

(g) Engage the 6 clamps to install the engine room main wire.

9. INSTALL ENGINE ROOM MAIN WIRE (for TMMC Made)

(a) Install the engine room relay block assembly with the 3 bolts.

Torque:

8.35 N·m {85 kgf·cm, 74 in·lbf}

(b) Engage the clamp.

(c) Engage the clamp and pin to install the wire harness protector.

(d) Install the bolt to secure the wire harness protector.

Torque:

8.35 N·m {85 kgf·cm, 74 in·lbf}

(e) w/ Security Horn Assembly:

(1) Connect the connector to the security horn assembly.

(f) Connect the connector to the vacuum warning switch assembly.

(g) Engage the 6 clamps to install the engine room main wire.

10. CONNECT UNION TO CHECK VALVE HOSE

(a) w/o Rear Air Conditioning System:

(1) Connect the union to check valve hose to the brake booster assembly, and slide the clip to secure it.

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

(b) w/ Rear Air Conditioning System:

(1) Connect the union to check valve hose to the brake booster assembly, and slide the clip to secure it.

(2) Engage the clamp to install the union to check valve hose to the suction pipe sub-assembly.

11. INSTALL RESERVOIR BRACKET

(a) Install the reservoir bracket with the 2 bolts.

Torque:

9.0 N·m {92 kgf·cm, 80 in·lbf}

12. INSTALL BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY

(a) Move the brake master cylinder reservoir assembly as shown in the illustration to engage the 2 claws.

*1

Brake Master Cylinder Reservoir Assembly

*2

Reservoir Bracket

(b) Connect the reservoir level switch connector and install the bolt.

Torque:

9.0 N·m {92 kgf·cm, 80 in·lbf}

13. INSTALL OUTER COWL TOP PANEL SUB-ASSEMBLY

Click here

14. INSTALL FRONT WIPER MOTOR AND LINK ASSEMBLY

Click here

15. INSTALL NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

Click here

16. INSTALL COWL SIDE TRIM BOARD LH

Click here

17. INSTALL FRONT DOOR SCUFF PLATE LH

w/o Rear No. 2 Seat: Click here

w/ Rear No. 2 Seat: Click here

18. INSTALL BRAKE MASTER CYLINDER SUB-ASSEMBLY WITH WAY

Click here

19. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

NOTICE:

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

Click here

20. INSPECT AND ADJUST BRAKE PEDAL

Click here

    Reassembly
    REASSEMBLY PROCEDURE 1. INSTALL VACUUM WARNING SWITCH ASSEMBLY (for TMC Made) (a) Install a new check valve grommet to the brake booster assembly. (b) Install the vacuum warning switch assembly to the ...

    Brake Fluid
    ...

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