The noise is "harmonic drone", from your speakers. My 2005 hybrid has this noise, often occurs at 50-ish mph, and the weather is warm. It is caused by the ANC module. Honda had TSB (or recall) for 2005-2007 hybrid to correct the issue. The solution is to replace the ANC module and two front speakers, because the noise is likely to damage the speakers.I've had my 2018 HAH for a week, and I've noticed sometimes while driving at a near constant speed, I'll start to hear a loud, and increasing volume "VOOOOM" noise that sounds like it's coming from under my seat, under the car. Sounds kinda like a vacuum cleaner - not a rumble.
If I let up on the gas, or even stomp on the gas pedal a bit, it goes right away.
Anyone know what that noise is, and if it's something I should be taking to my dealer?
Lemon laws vary by state. For some states, the law only applies if the vehicle is unable to be driven. In other states, the law only applies if the operation of the vehicle is "substantially impaired". In some states, it applies for any factory defect. What state are you in?We have a brand new 2018 Accord Hybrid. We get the same noise described above. It always happens at 52 mph and very often happens at 35 mph or so. It’s been to the dealership four times and they can’t figure out how to fix it. They temporarily disconnected the ANC or noise cancellation system. It’s a brand new car so I don’t feel I should have to drive a car with systems disconnected. I’m starting the lemon law process. Has anyone gone down this road of getting the car replaced or refunded our money?
It's because the active noise canceling system is disabled when the windows are open, so cracking a window turns it off.My car makes a loud VROOM noise too at various speeds. To stop it quickly, I crack a window. I’ve noticed If I keep a crack in the window or sunroof, the sound doesn’t come. It’s strange, it’s like you have to snap the car out of it with that cracked window.
The weights will do absolutely nothing. Please re-read the thread, the noise is not from the engine itself but the active noise canceling systems software reacting when the engine is at that rpm. There is something in the system that starts a feedback loop that leads to the speakers making a louder and louder rumbling noise that then feedbacks on itself. The ANC is tuned to counteract the engine noise so there is clearly a fault in the software at that RPM.I just bought a 2019 hybrid accord touring. I noticed the humming and the first thing I thought is this is a harmonic vibration that needs to be tuned out by adding some mass to the right part of the engine to change the harmonics . . .