The 2008 Honda Pilot takes a special 14" rear wiper blade for the special rear arm. Your dealer will have them (may be expensive) or you may want to look into "Trico Exact Fit Rear Blades" that fit these new special arms - you can find them online.
The good news is - specialized rear arms do not automatically mean the wiper blade is difficult to change - it just means you need to get the right blade for easy (and successful) installation.
Correct replacement windshield wiper blades are not only correct length, but also correct attachment. Never just buy by length only. Always lookup your vehicle in an application guide at the store or now-a-days you can 'lookup wiper size' online. The key to an easy install is correct size/correct part numbers.
The new replacement wiper will have step-by-step, illustrated instructions for removal and installation. Take your new wiper blade and instructions out to your vehicle and physically get the old and new wipers in your hands and take a look. The instructions will make 100% sense once you're looking and touching them.
Most wiper replacements snap off and on, do not require tools and take approximately 2-15 minutes.
I have a 2008 Honda Pilot myself. The driver's side is a 24" in. blade, and the passenger side a 21 in. blade.
The 2008 Honda Pilot has a V6 engine.
The 2008 Honda Pilot has 24 valves.
The 2008 Honda Pilot is a gas-powered vehicle.
The 2008 Honda Pilot has a 5-speed automatic.
The 2008 Honda Pilot has single overhead cam (SOHC).
The 2008 Honda Pilot is 15 ft. 8 in. (188 in.) long.
The 2008 Honda Pilot's turning circle is 38.0 ft..
The 2008 Honda Pilot runs on regular unleaded.
The curb weight of the 2008 Honda Pilot is 4264 lbs..
The 2008 Honda Pilot has a 28.1 degrees angle of approach.
The 2008 Honda Pilot has a 22.5 degrees angle of departure.