Weird sound in reverse
Racer
Joined: Apr 2007
Posts: 1,364
Likes: 72
From: Driving a UX Hybrid F-Sport! (in So California)
❔ Not Enough Info to Diagnose
- Is it a sudden, quick sound and then it goes away?
- Is it a continuous sound? If so...
- Does it start when you put it in Reverse and stop when taken out of Reverse?
- Does it only make the sound while moving in reverse or does it happen while idle in reverse?
- Is it a sound that is audible both from inside and outside the cabin?
- Does it make the sound with the Air Conditioning is completely off?
- Once the car is warmed up by driving a few miles/kilometres, will it still make the sound when put into Reverse?
- Are you able to record this sound and upload it here for us to listen?
Lead Lap
Joined: Nov 2013
Posts: 4,297
Likes: 1,225
From: IL
Pedestrian warning system. Hollow "blowing across a empty bottle" type sound?
When you are moving slowly with the IC engine not running a small speaker warns pedestrians.
Stopped you are not endangering anyone...silent. Rolling electrically.. soft tone. Engine running...not need for the speaker.
When you are moving slowly with the IC engine not running a small speaker warns pedestrians.
Stopped you are not endangering anyone...silent. Rolling electrically.. soft tone. Engine running...not need for the speaker.
Racer
Joined: Apr 2007
Posts: 1,364
Likes: 72
From: Driving a UX Hybrid F-Sport! (in So California)
Pedestrian warning system. Hollow "blowing across a empty bottle" type sound?
When you are moving slowly with the IC engine not running a small speaker warns pedestrians.
Stopped you are not endangering anyone...silent. Rolling electrically.. soft tone. Engine running...not need for the speaker.
When you are moving slowly with the IC engine not running a small speaker warns pedestrians.
Stopped you are not endangering anyone...silent. Rolling electrically.. soft tone. Engine running...not need for the speaker.
Racer
Joined: May 2016
Posts: 1,266
Likes: 379
From: Illinois
I like to call it the tugboat sound.
My old CT200H did that too, along with an audible chime that wouldn't stop, I had Lexus remove that repetitive chime (it only did a mandatory singular 'ding' once corrected) at the dealership (no fee).
My old CT200H did that too, along with an audible chime that wouldn't stop, I had Lexus remove that repetitive chime (it only did a mandatory singular 'ding' once corrected) at the dealership (no fee).
Thread Starter
Driver School Candidate
Joined: Jun 2020
Posts: 3
Likes: 0
From: Fl
Thank you everyone for helping!!!
Trending Topics
Lead Lap
Joined: Nov 2013
Posts: 4,297
Likes: 1,225
From: IL
tofuprod is describing an internal signal (our 2010 HS250h had is also) that was to remind you that you were in reverse. (!?!)
Default was the continuous chime, changed it to the one time trill at first dealer service!
The OP observation seems to be the external sound of the Pedestrian Warning. Toyota/Lexus set this up before there was any
legislation (in the US).
Default was the continuous chime, changed it to the one time trill at first dealer service!
The OP observation seems to be the external sound of the Pedestrian Warning. Toyota/Lexus set this up before there was any
legislation (in the US).
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
Racer
Joined: May 2016
Posts: 1,266
Likes: 379
From: Illinois
tofuprod is describing an internal signal (our 2010 HS250h had is also) that was to remind you that you were in reverse. (!?!)
Default was the continuous chime, changed it to the one time trill at first dealer service!
The OP observation seems to be the external sound of the Pedestrian Warning. Toyota/Lexus set this up before there was any
legislation (in the US).
Default was the continuous chime, changed it to the one time trill at first dealer service!
The OP observation seems to be the external sound of the Pedestrian Warning. Toyota/Lexus set this up before there was any
legislation (in the US).
Driver School Candidate
Joined: Mar 2021
Posts: 2
Likes: 0
From: CA
Mine makes a loud humming sound when in reverse and noticed the Toyota Rav4 makes the same sound while on reverse. The interesting thing is that my UX doesn't do it all the time so not sure if that's a defect or not.
Lead Lap
Joined: Nov 2013
Posts: 4,297
Likes: 1,225
From: IL
Pedestrian Warning only activates when you might endanger others...if you are completely stopped
with or without the IC motor running then it is silent. If you are moving with the (noisy) IC motor running
the speaker sound is off. When you first begin moving on Hybrid electric power it sounds the loudest.
As you roll a bit faster it diminishes the sound. Not sure of the years but perhaps 2019 and 2020's had
an extra loud warning when in reverse because the single speaker was mounted in the front. New and
improved (?) for 2021 they now have a pair of speakers F & R. Thankfully they have eliminated the inside
chime(s) that reminded you that you were in reverse.
with or without the IC motor running then it is silent. If you are moving with the (noisy) IC motor running
the speaker sound is off. When you first begin moving on Hybrid electric power it sounds the loudest.
As you roll a bit faster it diminishes the sound. Not sure of the years but perhaps 2019 and 2020's had
an extra loud warning when in reverse because the single speaker was mounted in the front. New and
improved (?) for 2021 they now have a pair of speakers F & R. Thankfully they have eliminated the inside
chime(s) that reminded you that you were in reverse.
Thread
Thread Starter
Forum
Replies
Last Post