PZEV or regular? On my 2008 it all one unit with the filter, accessed from under rear seat. Mine was replaced under the extended fuel warranty Read up on it though there’s a few caveats that can turn it into a nightmare IIRC. Do it when near empty

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k