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Vibration at low and high speed RX450H F Sport


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Hi all,

just bough a used 2016 F Sport and have noticed a shudder specifically at 8mph, almost as if the car is labouring.

there is also a vibration coming through the seat/general car body at >80mph. I am thinking it could be the design of the front spoiler and perhaps not being aerodynamic - causing the car to vibrate.

 

does anyone have experience with this?

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The low speed shudder doesn't coincide with the petrol engine kicking in does it? Mine sometimes starts off in electric mode and then the petrol engine starts with a perceptible vibration, but I wouldn't describe it as  a shudder. This car is very smooth and refined so it shouldn't shudder at any speed. I would be referring back to where you purchased it.

As for the high speed vibration - wheel balance??

Somebody else will be along shortly with their suggestions.

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2 hours ago, mcleodscott said:

Hi all,

just bough a used 2016 F Sport and have noticed a shudder specifically at 8mph, almost as if the car is labouring.

there is also a vibration coming through the seat/general car body at >80mph. I am thinking it could be the design of the front spoiler and perhaps not being aerodynamic - causing the car to vibrate.

 

does anyone have experience with this?

Not got the FSport myself but a 2017 Luxury and there is no vibration at all well over 80mph so I would not think it would be the spoiler, more like the wheel balance as 08ISF suggested.

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Can't believe what you describe in both situations is a "Characteristic" of the model especially as others don't have it.  Poor wheel balance is a possibility although if this was the case I would have expected this to show up before 80mph.  I suggest you return car to dealer and ask them to sort out out.  Your chance of getting this done is improved if you bought from an official Lexus Dealership.

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15 minutes ago, Barry14UK said:

Can't believe what you describe in both situations is a "Characteristic" of the model especially as others don't have it.  Poor wheel balance is a possibility although if this was the case I would have expected this to show up before 80mph.  I suggest you return car to dealer and ask them to sort out out.  Your chance of getting this done is improved if you bought from an official Lexus Dealership.

I second what Barry has written. 

I bought a 2014 RX450 last year with 55k on the clock, and have not experienced a single shudder at any speed - (not that I've ever exceeded 70mph of course!)    and we live at the bottom of an hill - - so there's plenty of slow and hill starts - and we've been gloriously shudderless.

The seller needs to have a look at that issue of yours

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Hi guys

Not that i should be some pro on Lexus, but i noticed some vibration on my Lexus around 80-90km/h then if the speed exceed 110km/h it kinda disappear.

When I put each wheel on the balancing machine, there were no errors - it didn't have to put much lead for balancing.

However, I was curious and I asked the specialist if, for example, the aluminum rim of the car would suffer a serious hit, say from a pit or a roadside, and there would be a fine deviation in the aluminum structure, would this deviation appear at balance?

His answer was "no - because the rim was hit on the whole surface and being a small deviation it is not felt on the balancing device but on the way you will feel it"

So I swapped the wheel with the spare one, on the side where I could feel the vibration and then surprise .... the vibration stopped . Conclusion: aluminum wheels will suffer over time deformations from roads that are transmitted in the form of vibrations.

It doesn't have to be the same problem with your car, but honestly it's much cheaper to test this hypothesis than to go to a service to waste time and money.

Cheers

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22 hours ago, mcleodscott said:

Hi all,

just bough a used 2016 F Sport and have noticed a shudder specifically at 8mph, almost as if the car is labouring.

there is also a vibration coming through the seat/general car body at >80mph. I am thinking it could be the design of the front spoiler and perhaps not being aerodynamic - causing the car to vibrate.

 

does anyone have experience with this?

Raise it with who you bought it from?

 

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Different makes of tyre, particularly at the front can make a difference or even how a tyre was put on regardless of balance., also tyre pressures should match.  The Dunlops that came with my car were stepped on the rears even though they still had plenty of tread.  They gave off a sound not very unlike a failing wheel bearing.  I found that these characteristics were common to these tyres and sure enough the sound was no longer there when I fitted new Cross Climates.  So good tyres property fitted can make a difference in some cases.

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On 12/28/2020 at 10:06 AM, mcleodscott said:

Hi all,

just bough a used 2016 F Sport and have noticed a shudder specifically at 8mph, almost as if the car is labouring.

there is also a vibration coming through the seat/general car body at >80mph. I am thinking it could be the design of the front spoiler and perhaps not being aerodynamic - causing the car to vibrate.

 

does anyone have experience with this?

What are your thoughts now, Scott? 

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