Hi

At road speeds above 50MPH a humming noise develops from the front nearside of the car. As the speed increases a buzzing/vibration develops behind the dash. I am sure this is related to air pressure because if I hear a gust of wind or feel a strong gust of wind through the steering the noise increases. I have checked for loose body panels and roof pillar trim but nothing seems loose.

Could this be a problem in the HVAC system? when intake air is under pressure. Can anyone tell me where the main fresh air input is located so I can begin my search there or can anyone suggest a fix this noise is driving me mad!!! 

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Currrent: 2005 FF Range Rover L322 Vogue TD6
Gone: 1999 Range Rover P38 HSE TD6
Gone: 1985 Land Rover 90 SWB diesel

For the HVAC i'm pretty sure its under that grill on your bonnet near the windscreen....

I had a really annoying buzzing for a few days over Xmas and it was speed/wind related. It was the rubber finishing at the front of the rail gutter on the roof which had come unstuck by about 1 cm and was bending up and catching the wind. could be this? I cured it by sticking it back down and now no noise.

Dolphinboy wrote:

I had a really annoying buzzing for a few days over Xmas and it was speed/wind related. It was the rubber finishing at the front of the rail gutter on the roof which had come unstuck by about 1 cm and was bending up and catching the wind. could be this? I cured it by sticking it back down and now no noise.

Thanks for the heads up

I think that I checked the windscreen rubbers ect but I will re-check this. 

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Currrent: 2005 FF Range Rover L322 Vogue TD6
Gone: 1999 Range Rover P38 HSE TD6
Gone: 1985 Land Rover 90 SWB diesel

Its the harder bit of plastic casing that clips down below the screen that is the problem. If they have been pulled up during a service/repair they are often not reseated properly....

Gazellio wrote:

Its the harder bit of plastic casing that clips down below the screen that is the problem. If they have been pulled up during a service/repair they are often not reseated properly....

As stated in my original post I have checked roof pillar trim but I will re-check this area again. Thanks for the reply 

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Currrent: 2005 FF Range Rover L322 Vogue TD6
Gone: 1999 Range Rover P38 HSE TD6
Gone: 1985 Land Rover 90 SWB diesel

Tends to be the piece along the bottom of the screen....

front scuttle

Had the very same noise on mine, sometimes its there, sometimes its not ! Just live with it now ! 2007 TDV8 Vogue SE

After the useful replies I decided to check the two areas suggested.

1. Rubber seal that protrudes from roof gutter.

This was found to be loose. At speed air could get be forced under this seal causing it to vibrate/buzz

2. Front scuttle.

I could not find much wrong here. The rubber seal that is attached to the scuttle and forms a seal between it and the windscreen seemed tight.

I decided to use heavy tape to secure both areas and then drive the car at speed and listen for any noise. I was pleased to find with the tape applied NO noise was heard. To determine which area was causing the noise I first removed the tape from the scuttle area and drove the car at speed again. As soon as I got past 55MPH the noise returned proving the noise is coming from the scuttle.

Photo 1.

Click image to enlarge

Click image to enlarge

Thought it would be the Scuttle as I had same. Mine just needed clipping down properly

Gazellio wrote:

Thought it would be the Scuttle as I had same. Mine just needed clipping down properly

This is the strange thing, everything seems tight, there is no movement in the scuttle at all, the rubber seal is also tight against the windscreen although the noise did stop when I taped as stated. 

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Currrent: 2005 FF Range Rover L322 Vogue TD6
Gone: 1999 Range Rover P38 HSE TD6
Gone: 1985 Land Rover 90 SWB diesel

Interesting post - funny how it was an exact same issue on the P38's. Mine had it..! Scuttle it was. Ash
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2016 SDV8 AB

Could try running some of the black sticky that Windscreen replacement guys use to smooth the seal so to speak.

I did same on our motorhome to good effect...