Chevrolet Cobalt SS problems by year
339 complaints across 2 model years, 2008–2009. 2009 draws the most at 222; 2008 the fewest at 117.
Read this first
Complaint volume tracks how many cars were sold as much as how reliable they were. A popular model year will always look worse than a rare one. Compare the dominant failure system between years rather than the raw totals.