I have a 2011 Tundra with gray leather seats. Bought new in December 2011. Had it for 5 months now with only 2,200 miles on it. The leather is already showing signs of wear wear on the corner of the leather right where the seatbelt touches the seat. Is this normal wear? I can only imagine how bad the wear will be in 2 years with 20,000 miles if this is happening in just 5 months with 2,200 miles. Is this covered by warranty? fyi, I'm 6'0" 180lbs.