o2 sensor
1 Answer
best site is probably rock auto. http://www.rockauto.com/en/catalog/hyundai,2005,elantra,2.0l+l 4,1431312,emission,oxygen+(o2)+sensor,5132 There are 2, upstream and downstream. Recommend you replace both. Computer is looking for a difference between the two (before the cat "cleans" and after)