Hybrid Technology Unique topics related to the GS450H model hybrid drivetrain and other features/options found only on the GS450H. Please use the main 3GS forum for discussion about shared components with other third generation GS models.

GS 450 h, year 2009 - short horn type noise heard only inside the car.

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Old 09-20-17 | 02:02 AM
  #1  
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Vineet8
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Question GS 450 h, year 2009 - short horn type noise heard only inside the car.

When stopped at a traffic light (brakes pressed) I heard a muted short horn type sound (Just like a short split second horn sound). At first I thought the car behind was doing it however soon I realised that it was my car. I cant her anything from outside - the intermittent noise comes at a random interval and can be heard from inside the cabin. This kept happening whenever I stopped the car (drive mode and with brake pressed).

There are no alarms or indicators on at present.

What could be be? Please help if anyone has any idea.

Thank you.

Last edited by Vineet8; 09-20-17 at 02:26 AM. Reason: FOR BETTER PRESENTATION AND INFORMATION
Old 09-20-17 | 06:58 AM
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You might want to try the subforum for the GS 450h.
https://www.clublexus.com/forums/hybrid-technology-215/

This is for the RX 450h.
Old 09-20-17 | 08:44 AM
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Could be the brake booster problem:
https://www.clublexus.com/forums/rx-...z-problem.html
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