I've been meaning to replace the O2 sensors on both my '98 and '96 Zetecs and noticed there are two types: universal and OE. Which is the best to get? I assume OE is best, but what makes the universal one different othe than it's about $10 cheaper?

Also, what brands have you bought/recommend, and how much do they cost?

Thanks everyone.

'98 Mystique Zetec w/ auto trans 103,900 miles Kenwood KDC-MPV7017 CD/MP3 HU Kenwood KFC-6889ie 6x8" 3-way speakers '96 Mystique Zetec ATX 108,000 miles