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The 2009 Hyundai Accent has an inline 4 engine.
The 2009 Hyundai Accent has a 1.6 L base engine size.
The 2005 Hyundai Accent came equipped with the 1.6L 4-cylinder engine. The battery group size (BCI) for this application is 121R.
631 seems to be the correct size. :-)
Anyplace that sells batteries can advise you on the correct size.
The 2014 Hyundai Accent has a 1.6 L base engine size.
The 2003 Hyundai Accent has a 1.6 L base engine size.
The 2005 Hyundai Accent has a 1.6 L base engine size.
The 2007 Hyundai Accent has a 1.6 L base engine size.
The 2008 Hyundai Accent has a 1.6 L base engine size.
The 2013 Hyundai Accent has a 1.6 L base engine size.
The 2011 Hyundai Accent has a 1.6 L base engine size.