One problem related to manifold/header/muffler/tail pipe has been reported for the 2013 Kia Motor RIO. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Kia Motor RIO based on all problems reported for the 2013 RIO.
Oil consumption with no obvious tail pipe smoke. Not leaking oil. Perhaps a quart of oil added to engine every 750 miles. This issue started around 115,000 miles. No low oil pressure indicater light activated. I had to replace catalytic converter do to oil deposits.