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

Two Issues w/ New Lexus

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Old 11-19-20 | 10:11 AM
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Default Two Issues w/ New Lexus

Hey all -
I'm not sure if either of these things are common, but here they are:
1) The larger rear seat doesn't fold properly when I pull the latch. I have to pull the latch and push the seat down (and work at it), Definitely not normal, so wonder if this is a common issue.
2) There is a howl coming from the rear that can best be heard when driving at maybe 25-40mph. It reminds me of my 3rd gen Tacoma when I first got it. Toyota's solution was to put caps in some of the holes in the frame or suspension, don't remember exactly. Anyway, has anyone else experienced this?

Appreciate the replies. btw, I searched and all I got was irrelevant results, so please include links to previous discussions if appropriate. Thanks!
Old 11-20-20 | 06:25 PM
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Which year, which model of Lexus is "New" Lexus are you referring to?
Old 11-20-20 | 08:19 PM
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Originally Posted by upnorth85
Which year, which model of Lexus is "New" Lexus are you referring to?
Apologies, I assumed vehicle info from my profile would appear next to my post. I just picked up a 2021 RX 350. The things I'm describing above aren't crazy problems, just wondering if been discussed before...particularly the rear noise. It's something I would live with and probably not pay any attention to. But if it's a known issue, then that would be good to know.
Old 11-21-20 | 02:15 AM
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Originally Posted by MattEcho
1) The larger rear seat doesn't fold properly when I pull the latch. I have to pull the latch and push the seat down (and work at it), Definitely not normal, so wonder if this is a common issue.
It doesn't automatically drop over -- you do have to (a) pull the lever to release the latch, and then (b) pull/push the seat into the folded position. Sounds like yours might be a little stiffer than normal. Feel free to ask your service advisor to check it out, and see whether there is a lubrication point that could smooth it out a bit.

2) There is a howl coming from the rear that can best be heard when driving at maybe 25-40mph. It reminds me of my 3rd gen Tacoma when I first got it. Toyota's solution was to put caps in some of the holes in the frame or suspension, don't remember exactly. Anyway, has anyone else experienced this?
Probably this is the infamous "drone" from a resonating exhaust system (see other posts on this topic). Going from Gen 3 to Gen 4, they added 45 hp. to the engine, then programmed the 8-speed transmission to shift at the lowest possible rpm, resulting in what old-timers used to call "lugging". It makes the entire exhaust system resonate. It's a feature. Mine is quieter when running 89 or 91 octane fuel.
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Old 11-21-20 | 07:02 PM
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Originally Posted by dibl
It makes the entire exhaust system resonate. It's a feature.
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Old 11-21-20 | 07:22 PM
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Originally Posted by dibl
It doesn't automatically drop over -- you do have to (a) pull the lever to release the latch, and then (b) pull/push the seat into the folded position. Sounds like yours might be a little stiffer than normal. Feel free to ask your service advisor to check it out, and see whether there is a lubrication point that could smooth it out a bit.

Probably this is the infamous "drone" from a resonating exhaust system (see other posts on this topic). Going from Gen 3 to Gen 4, they added 45 hp. to the engine, then programmed the 8-speed transmission to shift at the lowest possible rpm, resulting in what old-timers used to call "lugging". It makes the entire exhaust system resonate. It's a feature. Mine is quieter when running 89 or 91 octane fuel.
Good advice, I'll follow up with the dealer about the back seat. As for the "drone", I realize I notice it a lot more than just driving at low speed, like for example when I started the car up in the driveway this evening, it was pretty noticeable at first then quieted down a bit. Just something to get used to I guess.
Old 11-22-20 | 08:31 AM
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Originally Posted by MattEcho
Good advice, I'll follow up with the dealer about the back seat. As for the "drone", I realize I notice it a lot more than just driving at low speed, like for example when I started the car up in the driveway this evening, it was pretty noticeable at first then quieted down a bit. Just something to get used to I guess.
Cold start you may hear more in any car due to the initial higher rpms.
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