I have 2009 Odyssey with 140,000 miles. Check engine light came on. Dealer says I need a catalytic converter. Seems odd to me as the 3 previous Chrysler mini vans I had and drove to 250,000+ miles never needed to replace the cat. converter. Any thoughts? Is this normal? Also, my Honda dealer gave me 2 options, a Honda OEM replacement or a non-OEM which is $300 - $400 less. Appreciate thoughts from others.