I have a 2021 es300h, and it started making a knock or click type sound when I start moving or stopping. It sounds like it is coming from the front near engine or tires. It does it about 85% of the time. It will only make one brief noise. The brakes and everything seem to work fine. Also the noise is pretty easy to hear. I've had this car since January and it just started making it. I have an appointment for next week with the dealer, I was just curious if others experienced a similar problem. Thanks!

 

Impossible to guess without any video or point of reference. Could be related to the electric actuator that pressurizes the brake booster (normal) but would have to hear it.

 

I might have posted this video after your reply, were you able to watch it ? You have to probably turn up the volume. I believe the noise is at :04, :07, :11, :16...and two more spots not sure on the seconds.

 

Is looks like the dog bone motor mount is loose.

 

I certainly hear it. I'd be annoyed. Not very luxury-car sounding.