Update
9013490 is another bad lens
The lens has aperture problem. When shooting at f/4-f/22, photos are over exposed. Photos become more over exposed as the aperture is being stopped down further. I'm not satisfied with Pentax's service center. I sent in my lens for repairs in like new condition, the replacement lens I received had some wear, a small dent, and it was dirty. I have sent my gear to Pentax's service center in the past, I have always received the same equipment back. I was under the impression that I will be given a "new" lens, based on the email I received below.
Thank you for contacting Pentax.
We are replacing your lens with a new one. It should be shipping out today or tomorrow via UPS ground.
If you are in need of further assistance, please respond to this email or call our technical support center at 800-877-0155.