Hyundai's midsize sedan is redesigned for 2006 with new styling, more power, and standard curtain side airbags. Compared to the 1999-2005 model, the '06 is longer and taller by about 2 inches and has more passenger and cargo space. Sonata continues with 4- and 6-cyl engines. GL and GLS models have a 162-hp 4-cyl vs. 138 for Sonata's previous 4-cyl. The GLS V6 and LX models have a 235-hp V6 vs. 170 for the previous V6. The 4-cyl offers a choice of 5-speed manual transmission or 4-speed automatic. The V6 uses a 5-speed automatic. Antilock 4-wheel disc brakes and traction/antiskid control are standard. So are front side airbags and curtain side airbags. The LX includes heated leather seats and automatic climate control.