B, mine just started to do the same thing. Right front airbag going soft in the cold of the mountains. Got it back to sea level and it still goes down a little but nothing like it does in the mountains. As to why it does this, I'm at a loss. Gonna have it changed after X-mas.

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2006 4.8iS Black/Black with custom Audison Voce/Image Dynamics sound
Production Date - 10/05