Noticed Sunday I had lost the right rear clear back-up lens. Checked the left, it came off in my hand! I checked the Brickboard & was relieved that this could be purchased seperately. I called Don Beyer Volvo & the woman working Parts said that I had to buy the entire assy, & lucky for me she said she had it stock for $180. She would not listen to me. Not untill I called back with the Volvo part # for the lens kit did she change her story. Thank God for the Brickboard! Anyway, just a tip to the wagon people, you might want to give the lenses a tug.My next vacation I am going to read the 900 FAQ front to back. I am sure it will save me more frustration in the future.