2020 Lexus RX 350 · Roof & body noise
Moonroof rattles when tilted open
A roof rattle that appears only in the tilted position over bumps is the narrow condition covered by Lexus's adjustment bulletin.
What the reviewed source says
Start with the documented condition, not a parts guess.
Lexus documented a sliding-roof rattle on specified RX 350 vehicles when the glass is in the tilted-open position and the vehicle travels over a bumpy road. The repair procedure checks looseness at the drive-cable assembly, services the adjustment-nut contact surfaces and may require cable replacement. A rattle with the roof closed or during normal sliding may have a different source.
Words owners may use
Does this match the moment?
Symptoms in the pattern
- The noise occurs with the sliding roof in the tilted-open position
- Bumpy roads make the rattle easier to reproduce
- Closing the roof may stop the bulletin-related noise
- A technician can check looseness at the mechanical bracket and rear shoe
Vehicles and scope
- 2019 to 2022 Lexus RX 350 with WMI 2T2
- The bulletin separately includes 2018 to 2022 RX 450h vehicles with WMI JTJ
- The exact roof configuration and symptom must match
Manufacturer position
What the official procedure directs
Lexus directs technicians to remove the roof glass and inspect the drive cable for looseness. The procedure then services the contact areas with grease and installs new adjustment nuts. The cable assembly is replaced only if the rattle remains or looseness is confirmed.
The bulletin does not use a mileage threshold. It stated Lexus Basic Warranty coverage of 48 months or 50,000 miles for the specified condition, subject to the vehicle's current eligibility.
Original evidence
Open the documents behind this page.
Repair paths and safe checks
Separate the diagnosis from the action.
Service the roof adjustment points and inspect the cable
A Lexus or body technician removes the glass and checks the drive-cable assembly. The published procedure applies grease to the specified contact areas before the revised nuts are installed. The cable is replaced only when the inspection calls for it.
Removing and aligning roof glass incorrectly can cause wind noise, leaks or glass damage.
What owners reported
Did this repair fix the same symptom on your car?
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Compare tilted, closed and open positions
Clear loose objects from the cabin, then have a passenger note whether the sound occurs only with the roof tilted and stops when fully closed. Record the road type and approximate speed for the technician.
Do not apply general-purpose lubricant or place fingers in the roof mechanism. Keep the vehicle parked whenever inspecting the opening.
What owners reported
Did this repair fix the same symptom on your car?
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Useful before authorizing work
Read the method beside the problem
These guides explain the safety and evidence checks that apply to this problem file.
Bulletin, recall or warranty?
Three official looking documents can describe the same bad part while creating very different rights. The document number, VIN scope and remedy language matter more than what someone called it at the service counter.
Read guide ↗Water leaks into the car
Water travels behind trim, so the lowest wet patch may be far from the opening. Photograph where moisture first appears and keep clear of airbags and live connectors.
Read guide ↗More for this model
Other reviewed Lexus RX 350 conditions
2017 Lexus RX 350 · Brakes & vehicle control
Brake booster vacuum pump may lose braking assist
NHTSA campaign 18V211000 lists the 2017 Lexus RX 350 for a condition in which brake booster vacuum pump may lose braking assist.
2015 Lexus RX 350 · Fuel, battery & fire risk
Fuel delivery pipe may leak in the engine compartment
NHTSA campaign 14V576000 lists the 2015 Lexus RX 350 for a condition in which fuel delivery pipe may leak in the engine compartment.
2023 Lexus RX 350 · Steering & vehicle control
Spiral cable connection may deactivate the driver airbag
NHTSA campaign 23V480000 lists the 2023 Lexus RX 350 for a condition in which spiral cable connection may deactivate the driver airbag.