One problem related to o2 sensor has been reported for the 2005 Honda Accord. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Honda Accord based on all problems reported for the 2005 Accord.
Honda Accord ex - engine light came on. After getting tested oxygen sensor O2 sensor is defective. I have 3 other friends with Honda Accords and all of them problem with O2 sensors within 5 years of new Honda Accord ex.