9 days left on warranty (What is ethical?)

I replaced both outside review mirrors at a local shop a year ago because they looked worn but the dealer wouldn't warranty them. Now the left of the 2 makes a rattling sound upon closing the door. I would ask the shop to take a look at the mirror and see if there is anything that can be tightened up or if it is normal wear but I feel bad asking 9 days short of a year (when they gave me a 1 year warranty on these parts.) Is it an unreasonable request to ask them to check this part at no charge when it is only 9 days shy of the end of the 1 year warranty that they gave me on the parts?