It sounds like your ac compressor clutch. It might just be low on refrigerant. Possible leak. But I'm almost sure it just needs a refill.Hey I have a 06 TSX with 190k miles, I don't know if my ac is going out but I do get a knocking sound from the engine bay when the ac is on and it seems to go away when the ac is turned off. Did anyone experience a similar issue prior to their ac compressor going out?
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