Toyota is recalling more than half a million cars for three separate problems. The biggest recall applies to Sienna Minivans produced between 2004 and 2011. Cable corrosion on those vans could cause the spare tire to fall off. Highlander SUVs manufactured within the past year may have a software glitch affecting the front passenger seatbelt. A third recall involves Lexus cars made in 2012 for a potential brake pedal problem.