Turn brake-pedal pressure into rear shoe movement with this Dorman drum brake wheel cylinder, part number W37684 from the Dorman - First Stop line, a direct-fit rear replacement for the 1986-1989 Nissan D21, 1993-1995 Nissan Pathfinder and 1998-2005 Nissan Pickup. Dorman engineered it to match the fit, function and performance of the original wheel cylinder on these vehicles, and it is manufactured and tested for quality assurance.
When you press the pedal, hydraulic pressure from the master cylinder acts on the cups inside the wheel cylinder bore. That pushes the brake shoes outward against the drum.
- Ideal replacement: Engineered as a direct match for the original drum brake wheel cylinder on the listed applications.
- Cost-effective fix: Dorman recommends replacing the cylinder whenever the drum brakes are serviced, as a fast, economical step toward proper brake performance.
- Quality materials: Built with high-quality EPDM rubber cups and boots.
- Professionally tested: The wheel cylinder bores are surface-tested to give the pressure cups an optimum sealing surface.
Signs a wheel cylinder may need replacing include brake fluid seeping inside the drum or onto the backing plate, fluid-soaked brake shoes, and a soft or sinking brake pedal. Diagnose the cause before replacing parts, because other hydraulic components can produce similar symptoms. For engine-level fitment details, see the Buyer's Guide tab.
Interchange: 784-04309 · 84-04309 · W-51309 · 072-8373 · 134.42309 · 135.42309 · 375-67029
78404309 · 8404309 · W51309 · 0728373 · 13442309 · 13542309 · 37567029 · 18E258 · W906577 · 33964 · WC13964 · 44100F40 · 4410008G10 · 4410008G12 · 4410086G10 · WC37684 · F114208 · WC114208
This part cross-references / interchanges with the following part numbers:
18E258, 784-04309, 84-04309, W906577, W-51309, 072-8373, 33964, 134.42309, 135.42309, WC13964, 375-67029, 44100F40, 4410008G10, 4410008G12, 4410086G10, WC37684, F114208, WC114208
