In short there are three bolts (left, center, right) on the back side of the intake manifold. Remove these along with the top bolts and the accelerator cables to gain access to the rear plugs/wires.
remove the pretty plastic on the top of the motor once remove you will have direct access to the front 3 spark plugs, to remove the rear spark plugs remove the intake manifold and then you will be able to access the back bank of spark plugs. then reassemble everything. tools needed ratchet and sockets and large extension
The 2007 Hyundai Sonata has 55.3 in. of rear hip room.
The 2014 Hyundai Sonata has 56.7 in. of rear shoulder room.
The 2002 Hyundai Sonata has 55.7 in. of rear shoulder room.
The 2005 Hyundai Sonata has 54.4 in. of rear hip room.
The 2001 Hyundai Sonata has 37.6 in. of rear head room.
The 2014 Hyundai Sonata has 34.6 in. of rear leg room.
The 2011 Hyundai Sonata has 54.9 in. of rear hip room.
The 2010 Hyundai Sonata has 55.3 in. of rear hip room.
The 2011 Hyundai Sonata has 34.6 in. of rear leg room.
The 2006 Hyundai Sonata has 37.4 in. of rear leg room.