LC250 Rattling Sound (4 Viewers)

[scarkinsmel]

Mine goes in Thursday for the dealership to try and replicate the buzz/rattle/however you describe it noise.

I’ll report back what they find or don’t. Hopefully it’s an easy fix.

 

[Masbirdies]

Is this issue one where when the car is in drive, but foot on the brake, there is a vibration (occasionally)...a rumble...that comes from the passenger side? I have that going on. Once I take my foot off the break or put into neutral, the noise stops. It's not consistent either. I have noticed it when the engine is normal temp as well as cold.

 

[Masbirdies]

Quick update. In my LC's engine bay, there's a cooler line behind the hybrid battery that sat too closely to the firewall. The techs adjusted it, and the sound is gone. I'll keep testing, but here's a photo of what I'm talking about. I'd check that area and see if that's what's causing your rattle.

View attachment 3832666

I thought the hybrid battery was in the rear of the car. Which coolant line is it? Can you draw an arrow pointing to what was adjusted?

 

[scarkinsmel]

Unfortunately I couldn’t take the 250 in this week. I’ll be calling and setting up an appointment next week.

I, believe, it’s the same sound. I test drove 3 of them and all 3, on the test drives, were silent. I suspect I just didn’t notice the noise initially.

In any case, the dealership seems to be willing to identify the noise and then go from that point forward.

Oddly, some days it’s at every stop, some days not at all. Kind of annoying, like all the safety stuff that you can’t turn off, but I do like the vehicle

 

[Rover2cruiser]

Exact same rattling sound on my brand new (300miles) lc. Rattle sounds from front of passenger side on cold start and when put in drive while stationary. Sound is gone or reduces to unnoticeable when I switch to nuetral.

This is my first toyota and I'm already doubting the quality on this thing. I'm hopeful but disappointed at the same time.

 

[Shakey8]

Same exact symptoms for me as well. I couldn't find anything in the area of the cooling lines behind the hybrid system that seemed to be making contact that could cause a rattle, but I discovered that the plastic cover up front that covers the width of the engine bay over the radiator rattled quite a bit when i banged on it with my fingers or fist. I removed it which takes about 1 minute and voila [fingers crossed] no rattle for two days. I'm fairly confident that might be the problem for me and i hope it is for some of you since it should be easy to remedy. I just need to decide how I want to stop the cover from rattling. I'm thinking of lining the underside with something like Dynamat or stick on some strategically placed rubber strips.

 

[JimCarried]

Quick update. In my LC's engine bay, there's a cooler line behind the hybrid battery that sat too closely to the firewall. The techs adjusted it, and the sound is gone. I'll keep testing, but here's a photo of what I'm talking about. I'd check that area and see if that's what's causing your rattle.

View attachment 3832666

Hello, when you say coolant hose, is this the one you mean? Sorry, I am just wanting to know. I’ve taken it to the dealership twice and they can’t seem to replicate the sound but as soon as I drive off there goes the sound again ): so i’m gonna try to mess with it myself

 

[scarkinsmel]

Finally got mine in and this is the result.

The trip home was silent. Hope it remains so.

It may or may not resolve anyone else’s issue, but it’s a start.

 

[fizzlefish]

I just wanted to report I have this issue as well. 700 miles on the LC 250.

 

[JimCarried]

I'm 90% sure that's the correct fix for me as well. I couldn't replicate the rattle in my garage, but I do see where the metal hose/adapter piece is contacting the firewall and made slight wear in the paint. I didn't have any tools that fit back there to adjust the hose positions. I used some zip ties for now and I haven't heard the noise after a short drive. I scheduled an appointment for Thursday to have them try to adjust it. I'll report back, but so far it's looking like the same fix as yours.

Hello, do you happen to have any pictures of where you put the zip ties? I want to see which hose exactly is doing this so I can bring it up to the dealer. I would appreciate it

 

[thebonjo]

Hello all! I am having the same issue with my new LC. Dealer was not successful in locating the cause, but it sounds exactly as the vibration noise in this tread. Could anyone provide and detail (if available) to the specific hose/line that is hitting the firewall or which heater hose bracket would benefit from a foam washer? I am having difficulty myself locating the hose that is vibrating. Any help is appreciated.

 

[Gthomp423]

No issue here, fwiw. 2025 LC250 3,100 miles

 

[thebonjo]

I'm 90% sure that's the correct fix for me as well. I couldn't replicate the rattle in my garage, but I do see where the metal hose/adapter piece is contacting the firewall and made slight wear in the paint. I didn't have any tools that fit back there to adjust the hose positions. I used some zip ties for now and I haven't heard the noise after a short drive. I scheduled an appointment for Thursday to have them try to adjust it. I'll report back, but so far it's looking like the same fix as yours.

For my benefit (my LC is making the same noise), can you indicate where you zipped tied the hose/adapter? Having issue with dealer solving the problem. thanks!

 

[BookEmDano]

Quick update. In my LC's engine bay, there's a cooler line behind the hybrid battery that sat too closely to the firewall. The techs adjusted it, and the sound is gone. I'll keep testing, but here's a photo of what I'm talking about. I'd check that area and see if that's what's causing your rattle.

View attachment 3832666

Sheesh. I got this too. Intermittent, but exactly what has been described and recorded.
Reading this post got me to join Forum just to reply!

Could someone please post a pic with arrow or annotation where issue is arising (and how dealership or DIYers remedied)? That would be of great help. Thanks.

 

[Masbirdies]

Waited until my 5k service and brought this up to the dealership. Service advisor told me that along with the break squeal issue, there is no "Toyota" fix for this. I understand that the breaks need redesigned parts, however, sounds like this is just an adjustment or adding of washers. I got upset as they really didn't try to diagnose the vibration. So, I contacted Toyota Brand Engagement. As a result, the dealership contacted me and had me bring the vehicle in today (3 weeks later). I went in equipped with a sound recording of the issue and a picture of the service invoice that is posted earlier in the thread. After a bit of waiting, the service advisor said they have duplicated the problem, sent me home in a new Tundra (loaner), and said it would be ready tomorrow. I'll report back after I get it back. Also doing the break TSB update while they have it as well.

 

[BookEmDano]

Waited until my 5k service and brought this up to the dealership. Service advisor told me that along with the break squeal issue, there is no "Toyota" fix for this. I understand that the breaks need redesigned parts, however, sounds like this is just an adjustment or adding of washers. I got upset as they really didn't try to diagnose the vibration. So, I contacted Toyota Brand Engagement. As a result, the dealership contacted me and had me bring the vehicle in today (3 weeks later). I went in equipped with a sound recording of the issue and a picture of the service invoice that is posted earlier in the thread. After a bit of waiting, the service advisor said they have duplicated the problem, sent me home in a new Tundra (loaner), and said it would be ready tomorrow. I'll report back after I get it back. Also doing the break TSB update while they have it as well.

Thanks. I haven’t been back to dealership since vehicle purchase and don’t have many miles on the odometer. Noticed this noise early on. First thought it was passenger seatbelt vibrating against door, etc.. It’s pretty dang loud, and most definitely bothersome. Hoping my first ever interaction with Toyota service Isn’t getting blown-off! Please follow up (pics if you can). TIA.