Size 19 for both the driver's side and passenger's side and a fairly specialized 14" rear wiper blade that is difficult to find in most stores. See sources and related links below for more information. Since there are currently over 22 different wiper arm attachments, do not buy wipers just by length only - be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.
The 2001 Nissan Xterra has the most common hook-end wiper arms. See sources and related links below for installation videos. Also, purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages. Locate and press the tab or button where the wiper blade is inserted into the hook of the wiper arm and pull wiper blade out of hook. You may have to rotate and flex the blade to make enough clearance for the hook to pass through.
The 2001 Nissan Xterra has 16 valves.
The 2001 Nissan Xterra is a gas-powered vehicle.
The 2001 Nissan Xterra has a 5-speed manual.
The 2001 Nissan Xterra has an inline 4 engine.
The 2001 Nissan Xterra has double overhead cam (DOHC).
The 2001 Nissan Xterra runs on regular unleaded.
The 2001 Nissan Xterra is 14 ft. 10 in. (178 in.) long.
The height of the 2001 Nissan Xterra is 6 ft. 2 in. (74 in.).
You'll need a wiper arm puller, pretty easy takes less than 5 mins to pull
The 2001 Nissan Xterra has 54.5 in. of front shoulder room.
The 2001 Nissan Xterra has 37.8 in. of rear head room.