The Bilstein B6 4600 Series rear shock (part 24-186056) is a 46mm monotube damper for the rear axle of the 2005 Toyota Tacoma Base 4WD. A monotube body keeps the working piston and oil in one pressure tube, which is the design choice that separates this unit from a twin-tube stock shock. For a buyer who wants a rear damper with a monotube layout in place of the factory unit, this is the core reason to pay for the Bilstein.
Search terms this part typically matches include 2005 Tacoma base 4WD rear shock upgrade, Bilstein B6 4600 24-186056 monotube rear damper, 46mm monotube Tacoma rear shock, and stock height Tacoma rear shock replacement. Confirm your truck is a 6-lug model before ordering, since listings disagree on whether 2WD trucks are covered and the 5-lug Tacoma is not a match. Check the manufacturer's fitment notes for air-leveling or Nivomat-equipped rear suspensions before you buy. Replacing a rear shock is usually a jack-stand and hand-tool job, so have the manufacturer's install guidance and the included hardware list ready before you start.
