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This is a discussion on Whine within the Gen II Prius Care, Maintenance and Troubleshooting forums, part of the Gen II (2004-2009) Toyota Prius Forums category; No, I am not whining...my Prius is. It is a subtle, that is to say not loud, noise that does ...


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Old 04-29-2009, 12:23 PM   #1
jimnjo
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Default Whine

No, I am not whining...my Prius is. It is a subtle, that is to say not loud, noise that does not rise above road noise above 35 mph or so. It rises and falls with speed of vehicle, not engine rpms. And it goes completely away when I turn the steering wheel even slightly to the right, returning as I go back to straight (and not changing with a turn to the left). Seems unchanged by braking. Any ideas?

Vehicle is 2006 with around 54,000 miles
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Old 04-29-2009, 02:52 PM   #2
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Default Re: Whine

Are you not talking about the electric motor whine, or the inverter whine?

Tom
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Old 04-29-2009, 06:48 PM   #3
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Default Re: Whine

The description "whining" could be the electrics, but the other symptoms sound like a problem with a u-joint or wheel bearing. I'd take it to a dealer.
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Old 04-29-2009, 08:28 PM   #4
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Default Re: Whine

Hi Jimjo,

Uneven tire wear, a bad wheel bearing (front most likely), loose lug nuts, or a combination of the three - as when you steer the noise changes - are what come to mind. Wheel bearings are the most common cause.
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Old 04-30-2009, 03:36 PM   #5
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Default Re: Whine

I bought a used 2006 Prius on Monday and today had a chance to take a ride in another '06 that a friend was going to buy. I drove an '08, too, but hadn't noticed the lack of the whine on the '08 until I was in the other '06 today and noticed that mine had it and the other one didn't.

As near as I can tell it is not coming from tires or brakes. It could be transmission or electric in nature. It sounds like a classic "electric car" kind of whine where, as the car speeds up, you hear the motor noise pick up in intensity.
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Old 05-05-2009, 02:13 PM   #6
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Default Re: Whine

I was reluctant to think it was wheel bearings on so young a Toyota but the dealer replaced both front wheel bearings and whine has ceased. Under warrenty, as part of drive train warrenty that goes to 60,000. Glad of that!

Jim
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