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While I love the car and now understand 'lexus', and even upgraded my wife's Rav4 to an RX, Rattles seriously let it down, and are still the main annoyance that makes me want to swap the car

Thought I'd share the rattles I've fixed in the hope of helping others and maybe getting some tips for the other rattles.

  1. Biggest Annoyance by far... Door seals.  Took me about 18months to diagnose this, I was convinced it was the seat belt mech that was rattling.  turns out it was the door seals, originally fixed this by cleaning the door seals in 'Nextzett Gummi Pflege Flege Car Rubber Stick Door Restorer'. However I have now put some felt tape around the door frame interface and achieved a perfect fix.
  2.  Console Lower side panel front.  This rattle sounded like it was coming from just behind the steering wheel, but the console side, right at the front of the console under the dash.  I stuck some felt in this gap and the rattle has gone.
  3. Door window switches.  more of a creak than a rattle, particularly on a hot day.  fixed by pushing a small slither of bluetack into the gap around the bezel.
  4. Drivers side lower, knee airbag and lower trim panel.  Stuffed this entire area with foam strips, not a 100% fix yet so need another go at it, but I think the source of the issue is the lower narrow panel, so going to try and build more tension in an isolate it a bit better.  or maybe the airbag fixing.  only rattles when cold, but it is a persistent one until the car warms up.

I have another couple of rattles on the Dashboard, but have so far been unable to diagnose where they are coming from...

Please note, I'm not OCD or anything, the only car I have had in the past that has had as many rattles as this car was a Rover 25!  I've not been to the dealer about any as I don't have any close by...

I didn't have one rattle on my last car (mazda 3), so not sure if it is because the cabin is so much better isolated and hence they are more audible / not drowned out by road / engine noise), or just been unlucky and got a poorly built one (maybe a build issue at plant and it was stripped down and rebuilt?).

hope this is useful to someone.

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Useful info as I am a bit OCD on rattles and squeaks. The only one I have found on my car to date is the door seals - I have had experience of this before in my BMW 330i and at that time, like you, thought it was the seat belt mech until I found that it's a common problem on BMWs (especially the top rubbers) and cured with  gummi pflege - when I heard the same on the Lexus I knew what it was and cleaned the rubbers and applied gummi pflege and that silences it for about 6 months - in fact once the weather improves time to do mine again as I can just hear it coming back.

 

 

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I had a few creaks, buzzes, rattles on my IS300h. I would also get wind noise occasionally from door/window seal. Some of this is down to the quietness of the vehicle and being able to hear them. My previous RX and GSs have been the same, if not worse. My current GS is very good.

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Very happy with the door seals suggestion! This was driving me nuts and yes, it does sound like the seat belt mechanism! My solution is to just apply silicon spray on a rag and apply. I do not want to add any substance that could start to build up. Works a treat, very Lexus quiet again! It is only the right-rear door that was doing it. It happens to be the door that stays closed most of the time. The dealer looked for the rattle many times and was not able to fix. it. As a Lexus dealer you would think that noisy door seals could be common. Anyway, this is really a great forum and happy to have joined. It's also for guys like Darren sharing his experience so others can benefit. Thanks Darren!

Happy Lexus IS300h driver :yahoo:

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And I thought it was only me.  Same problem with the driver side seal.  When the silicone spray didn't work the garage (Lexus Reading) "repacked" an area around the windows.  Don't ask me what was repacked but the noise has gone. Great service.  Now trying to puzzle out an intermittent tapping which seems to come from behind the vanity light . A light thump seems to help.  I'll get used to it I guess.

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@darrude - Any photos to share / show what you've done and what felt you used please?

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On 3/10/2018 at 5:32 PM, matt8 said:

@darrude - Any photos to share / show what you've done and what felt you used please?

I'll try take some pictures, at lunch (if the rain stops!), as for the tape, I used I actually got it from the shop floor at work, but if you look on eBay for 'Anti rattle tape', or 'felt tape', there are loads of identical looking tapes for the door seal fix.  

For some packing out panel gaps (console and drivers side lower), I used this foam rolled up, and 2/3mm neoprene self adhesive foam pads, again from work, but similar stuff on ebay.

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Yes, I had the window seals / door issue on all three 3rd gen IS cars I've had. Had similar issues with BMWs too mind

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When the weather started to warm up two or three weeks ago, I began to hear creaking from the back of my IS300h. I couldn't tell where it was coming from but it sounded like the sort of body flexing you might get in an old convertible. More of a metallic creak than anything else.

I hadn't yet got around to getting someone to ride in the back of the car to identify where it was coming from. But I remembered reading this thread a while ago and eventually I began to wonder if it could be the rear door seals, even though the sound was more like creaking metal. I hadn't got any silicone spray and I've never seen where you can get "Nextzett Gummi Pflege Flege Car Rubber Stick Door Restorer". I also thought using detergent might not be good for the rubber.

So I just wiped the rubber door seals with a damp cloth. A couple of small areas felt a bit sticky but they only needed the damp cloth to clean them up.

Result? The creaking has completely stopped. So, many thanks to all who described the creaking door seals. Two or three minutes with a damp cloth has saved me from annoying and expensive trips to a dealer. 

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Last summer a noise I can only describe as sounding like marbles being shaken in a cardboard box started. Took me ages to trace but turns out it was right above my head as the sunroof was responsible. It wasn't loose so I just cleaned the rubber with baby wipes. That was two months ago and the noise has not been heard since. I don't have the problem this thread describes with the door seals but it might be worth someone who has giving these a go.

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After a while I've found that Gummi Pflegde stuff seems to send the door seals white.

Has anyone tried silicone spray or something similar?

Which reminds me, I need to remove my tin of mints as that's the only thing that rattles now! :wacko:

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My tin of Lexus boiled sweets used to rattle but they now all seem to be stuck together. The rattle has gone though!

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