A-Premium Rear Drum Brake Wheel Cylinder for Toyota & Scion — Rear Left/Right, 3/4 in Bore, Cast Iron

A-Premium rear drum brake wheel cylinder designed to replace worn or leaking cylinders on compatible Toyota and Scion rear axles.

This cast-iron wheel cylinder restores hydraulic pressure to drum brakes by housing two pistons and the inlet port for brake fluid. It’s built to match original equipment bore size and threads for an easier installation on specified Toyota and Scion models. The part is sold for rear left and right positions and includes the bleeder screw but not a bleeder cap, with thread and bore dimensions provided so you can confirm fitment before ordering.

Which vehicles does this wheel cylinder fit?

This cylinder is manufactured to fit a range of Toyota and Scion rear drum brake applications produced in specific years. Always verify your vehicle details in the listing before purchase to avoid mismatches. Some model years and regional builds are excluded, so check the special notes.

• Scion xB: 2004–2006 (rear left and right)
• Toyota Yaris: 2007–2015 and 2016–2017 (LE/L variants; confirm exceptions)
• Toyota Corolla: 2003–2007 and certain 2008 North American-built units
• Toyota Prius: 2003–2009 and Toyota Celica: 2003–2005

How does the cylinder’s specification affect installation?

> The wheel cylinder’s inside bore, thread sizes, and included hardware determine whether it will bolt up and accept your brake line and bleeder. This A-Premium unit has a 0.75 inch (3/4") bore for most listed models, with M10 x 1.0 inlet thread and a 10 mm thread diameter. A bleeder screw is supplied, so you won’t need to source that piece separately, though the cap is not included.

• Inside diameter: 0.75 inch (except some Yaris variants)
• Brake inlet thread: M10 x 1.0
• Thread diameter listed as 10 mm for mounting/connection
• Includes bleeder screw; bleeder cap not included

What materials and quality assurances come with this part?

The cylinder is cast from iron to provide the durability expected for brake components and to mirror original equipment metallurgy for performance and longevity. A-Premium backs the part with a one-year unlimited-mileage guarantee, offering a level of assurance should manufacturing defects appear. Reference numbers are provided to help cross-check compatibility with OE parts lists.

• Material: cast iron for strength and wear resistance
• One-year unlimited-mileage warranty from A-Premium
• Multiple reference numbers included for part cross-referencing
• Sold as rear left and right replacement units

How should I prepare before installing this wheel cylinder?

Confirm vehicle fitment using the given model years and reference numbers, and inspect brake hardware and drum components for wear. Have basic brake tools and a fluid-bleeding setup ready; since the cap is not supplied, retain or replace the bleeder cap after bleeding. If you’re unsure about fit, consult the vehicle’s service manual or a professional mechanic.

• Check model year and special notes in listing before ordering
• Gather brake tools and a fluid-bleeding kit
• Inspect drums, shoes, and mounting hardware for wear
• Keep or obtain a bleeder cap if needed after bleeding

Who is this for: This A-Premium rear drum brake wheel cylinder is aimed at DIYers and professional technicians replacing failed or leaking rear wheel cylinders on compatible Toyota and Scion models. It’s suitable if you need a cast-iron replacement that matches OE bore and thread dimensions and comes with a manufacturer warranty for peace of mind. If your vehicle is outside the listed years or has a different brake configuration, consult fitment references or a parts specialist before purchasing.

FAQ

Q: Does this wheel cylinder include the bleeder screw?

A: Yes, the bleeder screw is included but the bleeder screw cap is not supplied.

Q: What is the bore size and thread specification?

A: The cylinder has a 0.75 inch bore (except some Yaris years) and M10 x 1.0 inlet thread.