I bought the rear 18” blade with wiper frame for 3.99 from the Walmart a few days ago. It will most likely last no more than a month, but I’m covered for the couple of times when the rain stops by.

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2003 X5 4.6is Estoril Blue, acquired March 2018
2013 128i M Sport 6 MT Space Grey daily driver
2010 535xi 6 MT Barbera Red