Redfreddie

Just thought I'd let you all know that it was indeed a wheel bearing, the Mrs eventually got it looked at by our local garage and they sorted it out, no more buzzing/humming ! Thanks everyone for your advice and input

Hi Piers, It hasn't been resolved yet, I checked brakes etc but no issue found, at the moment she's living with it and it's not got worse. No idea what it could be, we're just praying that it's nothing bad !! Cheers, Col.

Thanks Roger, yeah I feel better now I'm still waiting for Lexus to comeback to me on the sat nav dvd drive unit

Hi CJ, I contacted the ebay guys breaking up the RX400h and they have the inverter and have quoted £400 for it, well worth a look ;o) Cheers, Col.

I'll use the Mrs's hand ;o)

Hi Rayaans, I'll check for sticking caliper, sounds like that's a possibility. Thanks Colin, I did have the window open earlier and couldn't hear anything at all at low speed, also when going fast there is no obvious noise from outside, but inside the car you can hear it whirring, all very odd but I will check it when the Mrs gets home for possible caliper sticking, Cheers, Col.

Tried the neutral test, no difference so still making noise ... If it was wheel bearings, wouldn't I notice it at lower speeds to, as no noise at all up to about 30 mph ? Cheers, Col.

Thanks all, I will check out wheel bearings, hopefully it is something simple and not expensive :)

Hi CJ, There's currently an RX400h on ebay that's being broken for parts, item number is 221809217588 (won't let me paste a link here for some reason), may be worth a shot :)

Hi Rayaans, The tyres are Bridgestone Potenza RE O31 on the rear, but they haven't been changed recently and the noise has only come on recently and has got louder over the last week. I'll try the neutral test later as well just to see if it goes or stays :) Cheers, Col.

OK I've just been out in it, the noise is coming from the rear of the car, when running on electric only it's as quiet as anything, and accelerating is ok too to start with, but as you go quicker the humming noise gets louder, then as you decelerate the noise comes down with it. I'm assuming it is something with the rear electric motor as that's the only thing in the rear I can think of, but everything appears to be working ok and there are no error codes ... So stumped for now but will get it checked out, just thought I'd mention it on here in case anyone has been through a similar experience and can shed any light on it :) Cheers, Col.

although from memory (mrs out at the mo) it still made the noise when I came off the accelerator, and it was a droning noise as it decelerated to, so at that point no petrol engine I'm assuming ? I will take it out later and try various things to try and isolate it a bit

Hi Colin, I only noticed it when accelerating, so when both petrol and electric being used to drive the car, I'll take it out later and check it out just to make sure, Cheers, Col.

Hi everyone, This post is about my Mrs car this time (yes, we both have 400h's :) ) I drove it yesterday and noticed it made a horrible kind of humming/buzzing noise as you accelerated, when I asked her she said it started happening recently and was getting worse. Just wondered if anyone may know what it could be, I'll assume it's hybrid related as never heard noise like that in my life on a petrol only car ! Hopefully nothing to major but any advice welcomed, obv she'll get it checked out fairly soon but one thing we have noticed is that garages don't seem keen (or won't) work on our cars, even servicing they'll only do a basic one, so the only option she probably has it to take it to a lexus dealer to get it looked at, Cheers, Col.

Thanks again everyone, I got the brackets back from Lexus so all good there now, and thanks Roger for the offer, appreciated :) but I've agreed with Lexus to get a new one for free from them as part of my ongoing issue with the Sat Nav. I must also stress that the Lexus dealer have been great in the way they have dealt with this, all very professional and as I would have expected from them. Hopefully I can be of help to someone soon on here, at least with any Sat Nav issues :)