Installation Instructions for Lexus RX350 and RX450h

Part Numbers:

• 75540
• 84540
• CQT75540

Tools Required:

• Wrenches: 10mm, 12mm, 17mm, 19mm
• Ratchet
• Torque Wrench
• Flat Head Screwdriver
• Hacksaw
• Tape
• Marker
• Socket Extension

Wiring Access Location:

• Not specified in this document.

Step-by-Step Instructions:

For RX350 Models:

1. Remove Tie-Down Bracket:

   • Use a 17mm socket to remove the two bolts securing the tie-down bracket on the passenger side.
   • Return the tie-down bracket to the vehicle owner.

2. Remove Weldnut Covers:

   • Using a flat head screwdriver, remove the two plastic caps from the rearmost existing weldnuts on the driver side.
   • Remove the rearmost rubber plug from the hole between the two weldnuts.

3. Trim Lower Fascia (for models after 2021):

   • Remove two tabs from the sensor bracket behind the lower fascia, if present.
   • Mark a 3"x3" trimming area using tape and a marker, centered from the edge of the bottom tab.
   • Use a hacksaw to trim the marked area.

4. Install Hitch:

   • Raise the hitch into position over the existing weldnuts.
   • Install two M12 bolts and conical washers on both sides.
   • Bend the exhaust heat shield if necessary to prevent it from touching the hitch.

5. Tighten Fasteners:

   • Use a torque wrench to tighten all M12 fasteners to 76 lb-ft (103 N·m).

For RX450h Models:

1. Remove Underbody Panel:

   • Use a 10mm socket to remove 13 fasteners securing the underbody panel. One plunger-style fastener is located behind the wheel well trim on the driver side.
   • Retain the underbody panel for reinstallation after trimming.

2. Remove Hole Plugs:

   • Remove three rearmost hole plugs from the driver side frame rail using a flat head screwdriver.

3. Remove Tow Loop:

   • Use a 17mm socket to remove the two M12 bolts securing the tow loop on the passenger side. Return the tow loop and fasteners to the vehicle owner.

4. Lower Exhaust:

   • Use a 12mm socket to remove two M8 bolts holding the exhaust hanger on the passenger side. Retain the bolts for reinstallation.

5. Install Hitch:

   • Raise the hitch into position over the exhaust.
   • Install two M12 bolts and conical washers on both sides.

6. Tighten Fasteners:

   • Use a torque wrench to tighten all M12 fasteners to 76 lb-ft (103 N·m) and M8 fasteners to 27 lb-ft (37 N·m).

7. Reinstall Exhaust:

   • Use a 12mm socket to reinstall the M8 bolts, conical washers, and hex nuts.

8. Trim Underbody Panel:

   • Use a hacksaw to trim the appearance panel in two places. Obtain vehicle owner approval before trimming.

9. Reinstall Underbody Panel:

   • Use the 13 retained fasteners to reinstall the appearance panel.

Hardware List:

• RX350:
  • (4) M12 x 1.25 x 40mm CL10.9 Hex Bolts
  • (4) 1/2” Conical Washers
• RX450h:
  • (4) M12 x 1.25 x 40mm CL10.9 Hex Bolts
  • (4) 1/2” Conical Washers
  • (2) 3/8” Conical Washers
  • (2) M8 Hex Nuts

Safety Notes:

• Check the hitch frequently to ensure all fasteners and the ball are properly tightened.
• If the hitch is removed, plug all holes in the trunk pan or body panels to prevent water and exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Follow safety precautions when working beneath the vehicle, and wear eye protection.
• Do not cut access or attachment holes with a torch.

Specifications:

• Hitch Type and Weight Ratings:
  • Weight Carrying: Max Trailer Weight 4,500 lbs (2,043 kg), Max Tongue Weight 675 lbs (306 kg).
  • Weight Distributing: Max Trailer Weight 4,500 lbs (2,043 kg), Max Tongue Weight 675 lbs (306 kg).
• Complies with safety specifications and requirements for connecting devices and towing systems of the State of New York, V.E.S.C. Regulation V-5, and SAE J684.

Installation Instructions for Vehicles (Generic)

Part Numbers:

• 75540
• 84540
• CQT75540

Tools Required:

• Wrenches: 10mm, 12mm, 17mm, 19mm
• Ratchet
• Torque Wrench
• Flat Head Screwdriver
• Hacksaw
• Tape
• Marker
• Socket Extension

Wiring Access Location:

• Not specified in this document.

Step-by-Step Instructions:

For RX350 Models:

1. Remove Tie-Down Bracket:

   • Use a 17mm socket to remove the two bolts securing the tie-down bracket on the passenger side.
   • Return the tie-down bracket to the vehicle owner.

2. Remove Weldnut Covers:

   • Using a flat head screwdriver, remove the two plastic caps from the rearmost existing weldnuts on the driver side.
   • Remove the rearmost rubber plug from the hole between the two weldnuts.

3. Trim Lower Fascia (for models after 2021):

   • Remove two tabs from the sensor bracket behind the lower fascia, if present.
   • Mark a 3"x3" trimming area using tape and a marker, centered from the edge of the bottom tab.
   • Use a hacksaw to trim the marked area.

4. Install Hitch:

   • Raise the hitch into position over the existing weldnuts.
   • Install two M12 bolts and conical washers on both sides.
   • Bend the exhaust heat shield if necessary to prevent it from touching the hitch.

5. Tighten Fasteners:

   • Use a torque wrench to tighten all M12 fasteners to 76 lb-ft (103 N·m).

For RX450h Models:

1. Remove Underbody Panel:

   • Use a 10mm socket to remove 13 fasteners securing the underbody panel. One plunger-style fastener is located behind the wheel well trim on the driver side.
   • Retain the underbody panel for reinstallation after trimming.

2. Remove Hole Plugs:

   • Remove three rearmost hole plugs from the driver side frame rail using a flat head screwdriver.

3. Remove Tow Loop:

   • Use a 17mm socket to remove the two M12 bolts securing the tow loop on the passenger side. Return the tow loop and fasteners to the vehicle owner.

4. Lower Exhaust:

   • Use a 12mm socket to remove two M8 bolts holding the exhaust hanger on the passenger side. Retain the bolts for reinstallation.

5. Install Hitch:

   • Raise the hitch into position over the exhaust.
   • Install two M12 bolts and conical washers on both sides.

6. Tighten Fasteners:

   • Use a torque wrench to tighten all M12 fasteners to 76 lb-ft (103 N·m) and M8 fasteners to 27 lb-ft (37 N·m).

7. Reinstall Exhaust:

   • Use a 12mm socket to reinstall the M8 bolts, conical washers, and hex nuts.

8. Trim Underbody Panel:

   • Use a hacksaw to trim the appearance panel in two places. Obtain vehicle owner approval before trimming.

9. Reinstall Underbody Panel:

   • Use the 13 retained fasteners to reinstall the appearance panel.

Hardware List:

• RX350:
  • (4) M12 x 1.25 x 40mm CL10.9 Hex Bolts
  • (4) 1/2” Conical Washers
• RX450h:
  • (4) M12 x 1.25 x 40mm CL10.9 Hex Bolts
  • (4) 1/2” Conical Washers
  • (2) 3/8” Conical Washers
  • (2) M8 Hex Nuts

Safety Notes:

• Check the hitch frequently to ensure all fasteners and the ball are properly tightened.
• If the hitch is removed, plug all holes in the trunk pan or other body panels to prevent water and exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Follow all safety precautions when working beneath the vehicle, and wear eye protection.
• Do not cut access or attachment holes with a torch.

Warranty Information:

• For complete warranty instructions, please download the full installation PDF.

Specifications:

• Hitch Type and Weight Ratings:
  • Weight Carrying (Ball Mount): Max Trailer Weight 4,500 lbs (2,270 kg), Max Tongue Weight 675 lbs (306 kg).
  • Weight Distributing: Max Trailer Weight 4,500 lbs (2,270 kg), Max Tongue Weight 675 lbs (306 kg).
• Complies with safety specifications and requirements for connecting devices and towing systems.

Attention:

This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.

Technical Support:

For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.