Why is my car making a strange whirring noise?

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Why is my car making a strange whirring noise?

I have a Toyota Yaris Verso automatic and it has started developing a strange whistling/squeaky noise. It's only really noticeable when I engage D but often in P mode and when starting up you can also hear it faintly. I've scoured forums and thought it could be something to do with the A/C compressor or serpentine belt but the bizarre thing is as soon as i turn on the A/C the noise goes.

Asked on 21 July 2017 by gianni

Answered by Honest John

I think you have managed to isolate that the noise is coming from the electromechanical a/c compressor clutch when it is disconnected (a/c off). On a Yaris, this is a separate part. I've had them replaced when they failed completely. Probably cost about £200 at a UK a/c specialist. (A dealer will probably recommend an entire new compressor that costs as much as the car is worth.)

Tags: air con unexplained noises

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