My wife recently noticed the samething on my '09. I would like to know what it is as well. It does seem to be related to the fan for the climate control

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| ZCW | ZPP | ZPS | ZRC | ZSP | ZTP | 322 | 2VA | 456 | 4AD | 4UB | 610 | 655 | 6FF | 6FL | Combox + CIC retro |