My 2001 Sienna XLE had the same problem. It looked too complicated for me, and I didn't want to mess with the fuel system, so I had a Toyota dealer do it. It's fairly expensive because it also requires inlet and outlet valves.
Sorry for the delay in responding. Most of the miles are from frequent trips between Ontario Canada, Chicago and Minneapolis. I also drive a lot of miles in my vocation as a pastor.
Stan
Hi. I'm new to the Club, too, but a long-term Toyota owner. - A 2001 Sienna XLE purchased new, now has 240,000 kms on it; a 2002 Camry XLE 4 cylinder now has 150,000 kms on it, and a 2006 Lexus GS300 with 130,000 kms.
I'm happy with all of them.
Stan