RX - 4th Gen (2016-2022) Discussion topics related to the 2016 and up RX350 and RX450h models

Rear suspension noise

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Old 10-29-18, 05:17 PM
  #16  
GSFRX350
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Originally Posted by PeeVee
I had one... thought that it was from behind.
Two technicians on the first two visits could not find the problem.
The third technician found that the problem came from the sun roof railing. He hit on the ceiling to verify that it would rattle at the impact. Had it changed and the squeak sound is gone!
The technician had seen the same problem from another vehicle a couple of weeks before and knew right away. That was last year.
The funny thing is that a couple of weeks ago, someone with a similar problem showed up at my dealer and I got a call from the service manager. He wanted to know if the solution done on my RX had fixed the problem. I told him that it worked perfectly! He wanted to know before spending on the part for nothing...
I'm sure there was a thread on here about that issue with the sun roof rails, quite a few people with the same issue.
Old 10-29-18, 07:39 PM
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Swinke
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Rear trailing arms are most likely suspect for the noise squeak noise from rear over bumps like ur describing.
Old 04-19-19, 04:56 AM
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solnicjo
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Default 2018 RX350 F-Sport series 3

Hello guys ... has anyone encountered a knocking noise when driving over a series of bumps. It sounds to me as if its coming from the rear of the car but not 100% sure. There dealer has felted pretty much the entire cargo area but the noise is this there. I would appreciate anyone's comments that would help.
Thanks guys
John
Old 04-19-19, 06:49 AM
  #19  
ravenuer
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Originally Posted by solnicjo
Hello guys ... has anyone encountered a knocking noise when driving over a series of bumps. It sounds to me as if its coming from the rear of the car but not 100% sure. There dealer has felted pretty much the entire cargo area but the noise is this there. I would appreciate anyone's comments that would help.
Thanks guys
John
While the dealer may have looked the area over, have you taken a ride WITH the service advisor/mechanic in the car and make sure he hears the noise?
Old 04-20-19, 04:12 AM
  #20  
solnicjo
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Originally Posted by ravenuer
While the dealer may have looked the area over, have you taken a ride WITH the service advisor/mechanic in the car and make sure he hears the noise?
Thanks for the reply revenuer ... yes the service manager and the service tech were on the road test. The service tech said the knock was coming from the tailgate. They insulted the tailgate. The knock is still there.
John
Old 06-17-19, 04:02 PM
  #21  
g1itchgsr
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My wife’s 2017 RX350 F-Sport had this issue (20k miles on the car), the dealer fixed it by replacing both rear trailing arms.
Old 06-17-19, 04:21 PM
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solnicjo
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Thanks guys .... what are rear trailing arm bushings? Can anyone send me a picture of them.
Thanks
John
Old 06-17-19, 04:24 PM
  #23  
toyotaman7
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Originally Posted by g1itchgsr
My wife’s 2017 RX350 F-Sport had this issue (20k miles on the car), the dealer fixed it by replacing both rear trailing arms.

Same here..

Seems to be a common problem.
Old 06-17-19, 07:57 PM
  #24  
g1itchgsr
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Originally Posted by solnicjo
Thanks guys .... what are rear trailing arm bushings? Can anyone send me a picture of them.
Thanks
John
My dealer changed out below rear trailing arm assemblies and did an alignment.

48760-0E070
48780-0E080

I was told they’ve seen this issue / noise before on other vehicles.
Old 07-08-19, 12:51 PM
  #25  
s4iscool
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Same here. The dealers are aware of this issue now, and will initially lube but then replace the arms if you have to come back. Hopefully you can convince your dealer to replace on the first visit to save everyone time.
Old 07-23-19, 11:28 AM
  #26  
BRITTO
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Default Rear suspension noise

I have a 2016 RX450h F Sport model that had rear suspension squeeks on bumps. At 10,000 miles the dealer lubricated several areas but it returned. Good news! In May 2019 there was a bulletin on this issue and new trailing arms were replaced. Part numbers 48780-0E080 and 48760-0E070. Problem solved!
The following 3 users liked this post by BRITTO:
mtsunshine (11-04-20), PeeVee (07-24-19), ravenuer (07-23-19)
Old 07-23-19, 05:27 PM
  #27  
gnguyen
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Originally Posted by BRITTO
I have a 2016 RX450h F Sport model that had rear suspension squeeks on bumps. At 10,000 miles the dealer lubricated several areas but it returned. Good news! In May 2019 there was a bulletin on this issue and new trailing arms were replaced. Part numbers 48780-0E080 and 48760-0E070. Problem solved!
Can you post the full bulletin number? I have an intermittent squeak on my 2019 RX350

Thanks!
Old 07-24-19, 04:32 AM
  #28  
PeeVee
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Mine started that and they could not pin point the problem.

Thanks!
Old 07-24-19, 08:23 AM
  #29  
elimmigran
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I just started hearing this noise too! Bulletin please.
Old 07-24-19, 08:32 AM
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technodis
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My 2016 F Sport has been doing this for around 10k miles. I’m at 70k now and out of warranty.


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