A-Premium Rear Drum Brake Wheel Cylinder for Toyota — 7/8 inch Bore, Cast-Iron, Includes Bleeder Screw

This A-Premium rear drum brake wheel cylinder is a direct-fit replacement for many Toyota Pickup, Tacoma, 4Runner and T100 models, delivering a 7/8" (0.875") bore, cast-iron construction, and supplied bleeder screw for both rear driver and passenger sides.

If your vehicle’s rear drum brakes are leaking, soft under braking, or the parking brake performance feels inconsistent, the wheel cylinder is a common wear item that restores hydraulic pressure to the rear shoes. A-Premium’s replacement unit matches OEM thread sizing and bore dimensions, is pressure- and high-temperature tested, and includes a one-year unlimited-mileage guarantee for added confidence.

Which Toyota models and years does this wheel cylinder fit?

This cylinder covers a range of Toyota Pickups, Tacomas, 4Runners and T100s across late 1980s through early 2000s model years. Fitment varies by drivetrain and body style—4WD and RWD applications are listed in the compatibility details, so confirm with your vehicle selector before ordering.

• Pickup: 1987–1990 (4WD, 1/2 Ton), 1991 (4WD), 1992–1995 (4WD, 1/2 Ton)
• Tacoma: 1995–2004 (4WD standard/extended cab), 1998–2004 (RWD Pre Runner)
• 4Runner: 1987–1988, 1990–1991, 2001–2002 (with 16" wheels)
• T100: 1993–1994 (RWD base and SR5)

What are the key specifications I need to know before buying?

The most important dimensions are the inside bore and the inlet thread size—this unit has a 0.875 inch (7/8") inside diameter and an M10 x 1.0 inlet thread. The cylinder is cast iron, designed for rear driver and passenger side replacement, and includes the necessary bleeder screw but not a bleeder cap.

• Inside diameter: 0.875 inch (7/8")
• Brake inlet thread: M10 x 1.0 (10 mm thread diameter)
• Material: cast iron for durability
• Bleeder screw included; bleeder screw cap not included

How is quality and reliability verified for this brake wheel cylinder?

A-Premium subjects this cylinder to rigorous pressure and temperature testing to ensure consistent performance under real-world conditions. Tests include pressure cycles from 0.2 MPa up to 20 MPa and high-temperature exposure at 120°C to check sealing and material integrity.

• Pressure-tested across a wide range to reveal leaks or seal failures
• High-temperature test at 120°C for thermal stability
• Manufactured to match reference numbers W37841, 4755035170, 4755035190, 4755035280, 4755035340

Do I get support or a warranty with this part?

Yes — A-Premium backs this brake wheel cylinder with a one-year unlimited-mileage warranty, giving you protection against manufacturing defects. The brand also provides fitment guidance and a vehicle selector on the product page, so verify your exact year/drive configuration before purchase.

• One-year unlimited-mileage manufacturer warranty
• Product fitment reference numbers included for cross-checking
• Customer guidance: enter vehicle info and read the Special Notes before ordering

Who is this for? This A-Premium rear drum brake wheel cylinder is intended for DIY mechanics and professional technicians restoring or maintaining older Toyota trucks and SUVs with drum brakes. If your vehicle matches the listed model years and you need a durable, tested, cast-iron replacement with correct thread and bore dimensions, this unit is a practical choice to return rear brake hydraulic function and reliability.