[RX400H] Strange buzzing in the 40-70 km/h range.

[Technik18]

Good day everyone,

I bought a 2008 RX 400h this week and with a documented mileage of 194k km, car serviced at aso until 2020, test drive and check showed no faults, although I may not have heard this when I bought it. I would also add that the fluid under the radiator cap is not running out, it is full, and the timing was replaced 45k ago.

Well, the first problem is a buzzing/vibrating noise coming from the middle or right side of the car, only in the speed range from 40 to about 80 km/h (most buzzing at 60) and when gently pressing the accelerator pedal at about 1400 rpm (40KW), it stops when I take off the gas (when I put N in while driving, it also stops), but when I press harder about 80-100KW on the tachometer, there is no buzzing. I'm really bummed about this already ;/.

The second thing that is less annoying, but nevertheless occurs, are the dipped beam headlights and the lever to change them, which on ignition works as it should, but after starting the engine the dipped beam lights are on even in OFF and the first position, when set to daytime running lights the light indicator on the clocks goes off but physically they are still on.

I would also add that the techstream is not showing any errors. I am very much asking for help as this is all I have been thinking about since yesterday.

[Technik18]

I'm considering tyres/wheels (I'll check on Tuesday), muffler (a bit rusty) and gearbox, I think a bearing or joint would rumble despite taking the gas off.