This is the Bilstein B6 4600-series rear shock in 46mm monotube form, built for the rear axle of the 2004 Nissan Titan LE 4WD. The single-tube body is the design the B6 4600 line is built around, and it is positioned as a stock-height replacement. Owners on user forums say lifted rears generally need a different Bilstein series, so check your lift height before ordering. If you are searching for a 2004 Titan LE 4WD rear shock upgrade or a 46mm monotube rear damper, this is the part that matches.
Compared with a worn factory unit or a budget replacement, the case for a B6 4600 is consistency. The monotube design is meant to keep damping steady through repeated hard use, which matters on a truck that tows or runs rough roads. Owners on user forums report a firmer, better-controlled rear after the swap. One owner who also added air bags said the combination made the biggest difference, so treat the shock as one part of a rear-end upgrade rather than a complete fix.
Owners on user forums report that the rear swap is manageable at home. The rear can be replaced by raising the frame rather than the axle, but compressing the new shock takes real strength, and many owners support the frame on jack stands. Expect a snug upper bracket that some owners solved with a spacer. User forums also report that rear yellow Bilsteins mount boot-down. Confirm fitment against your VIN before ordering, since forum members report the shock fits non-XD Titans from 2004 to 2024.
Owners on user forums report that this B6 4600 rear fits non-XD Titans from 2004 through 2024, which includes the 2004 LE 4WD. Confirm the fitment against your truck's VIN with the manufacturer before ordering.
Owners on user forums point lifted rear applications, generally those above about one inch of lift, toward other Bilstein series such as the 5125. Check your lift height before choosing this B6 4600 for a lifted truck.
User forums cite the official guidance that rear yellow Bilsteins go boot-down, while the front units mount boot-up.
Owners on user forums describe the rear swap as a moderate job for a home mechanic. You can work without lifting the axle, but you will need enough strength to compress the new shock, and many owners raise the frame onto jack stands to make the job easier. Plan on a floor jack, jack stands, and a socket set. Use the factory torque specification for the mounting hardware rather than guessing. Common gotchas include an upper bracket that needs spreading or a spacer for a snug fit, a clunk from loose mounts, and a warning from owners not to drive with a shock removed. Avoid ratchet straps to compress the shock, since owners flag them as a slip hazard.
