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I am investigating a car which seems perfect when speed less than 100 km/h. When driven more than 100 km/h, there is a side noise somewhere, but I have no idea where it comes and how. Everything has been checked 12/2016, next time 12/2017. Very nice piece othertise, driven 170 000 km, no accidents, nice bottom of the car - - no damages.

Side noise: I hear a continuous side noise (from the right side) which comes you drive faster than 100 km/h. I does not come from tires, because tested with other set. I do not see any leakages in the motor. There is no noise when you drive less than 100 km/h.

  • I think the noise is not like the one in the video here coming from the right headlight, but exclude it completely. I cannot understand why the side noise occurs at the higher speed only - - maybe because vibration only then significant.

Which typical effects can cause a side noise when driving 100 km/h?

Car: Alfa Romeo 159 1.9 JTS 4d
Fuel: bensin
Kilometers: 170 000
Manufactured: 2007

Léo Léopold Hertz 준영
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I know this an old question, but as I had it myself on my 159 and on my new Giulia as well...
It is most likely wind-noise coming through the weather-seals at the top of one of the doors.
Only noticeable when driving fast enough and (in some cases) may go away when driving even faster.

You can verify this by pressing some fingers into various spots on the weather-strip while driving and listen if the sound changes. (Obviously have a passenger do that for any door which is not the drivers door !) My 159 had it on the rear-door passenger-side and my Giulia has it (less pronounced) on the driver-side front-door.

On my 159 (which I bought 2nd hand and which was out of warranty) I was able to fix it myself by prying open the weather-strip and packing a thin strip of extra rubber under it to bulk it up, improving the seal. (An old piece of rubber hose which I cut length-wise to get a strip.)
This cured the problem completely.

My Giulia is still under factory warranty so I'm not going to mess with it myself.
It will get its scheduled 60.000 KM service next Monday. I'll be checking with the workshop if they can do something about the noise.

Tonny
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