A-Premium Rear Drum Brake Wheel Cylinder Compatible with Toyota & Scion — Cast Iron 3/4in Bore, OE Fit

A-Premium Rear Drum Brake Wheel Cylinder is a cast-iron replacement cylinder engineered to restore rear drum braking function on compatible Toyota and Scion models.

This wheel cylinder is a direct-fit aftermarket replacement designed for rear left and right positions on a range of Toyota and Scion vehicles. It matches OE-style dimensions and thread patterns so you can replace a leaking or seized cylinder without modifying lines or backing plates. The unit ships with the bleeder screw installed and is built from cast iron for durability under repeated brake use.

Which vehicles can use this wheel cylinder?

This A-Premium cylinder fits specific Toyota and Scion models across multiple years, covering common platforms that use rear drum brakes. Check your exact year and submodel before ordering to ensure correct bore size and fitment.

• Scion xB: 2004–2006 (rear left and right)
• Toyota Yaris: 2007–2015, and select 2016–2017 LE/L models (verify notes)
• Toyota Corolla: 2003–2007 and 2008 North American built models
• Toyota Prius: 2003–2009; Toyota Celica: 2003–2005

What are the key specifications and hardware included?

The cylinder has a 3/4-inch inside bore (except some 2016–2017 Yaris models) and an M10 x 1.0 brake inlet thread. The package includes the bleeder screw but not a protective bleeder cap.

• Material: cast iron for strength and wear resistance
• Inside diameter: 0.75 inch (verify for some Yaris years)
• Brake inlet thread size: M10 x 1.0; thread diameter: 10 mm
• Bleeder screw included; bleeder screw cap not included

How do I confirm fitment and replace the part correctly?

Enter your vehicle information where shown on the product listing and compare the reference numbers to your existing cylinder before purchase. During installation, inspect brake lines, boots, and wheel cylinder mounting for wear, and follow standard brake bleeding procedures after replacement.

• Compare reference numbers: W610156, WC370146, 4757002020, 4757020101, and others listed
• Verify bore size for your specific year/model (especially 2016–2017 Yaris)
• Replace boots and springs if corroded; bleed system to remove air

Who is this for? This wheel cylinder is aimed at DIY mechanics, independent repair shops, and fleet maintainers who need a reliable, OE-style rear drum wheel cylinder for Toyota and Scion vehicles. It’s suitable for anyone replacing a leaking, stuck, or internally corroded cylinder and who wants a cast-iron component with an aftermarket warranty for peace of mind. Always confirm exact model year and part references before ordering to ensure perfect compatibility.