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

This A-Premium rear drum brake wheel cylinder restores reliable braking action for compatible Toyota and Scion rear wheels.

Designed as a direct-replacement brake wheel cylinder, this cast-iron unit fits rear left and right positions on a range of Toyota and Scion models. It recreates the original bore dimensions and thread sizes to work with existing drum brake hardware, helping maintain even hydraulic pressure and predictable pedal feel when installed correctly. The part is sold by A-Premium and is backed by a one-year unlimited-mileage guarantee for manufacturing defects.

Which models and years will this wheel cylinder fit?

This cylinder matches specific Toyota and Scion rear-drum applications. It covers multiple model years and is intended for rear left and right installations, but compatibility depends on the exact vehicle build and production location.

• Scion xB: 2004–2006 rear left and right fitment
• Toyota Yaris: 2007–2015 and select 2016–2017 LE/L models (note exceptions)
• Toyota Corolla: 2003–2007 and 2008 North American built vehicles
• Toyota Prius: 2003–2009 and Celica: 2003–2005 rear drum setups

What are the key specifications and hardware details?

The cylinder is cast iron with a nominal inside bore diameter and standard brake line thread. It includes the internal bleeder screw but ships without a bleeder screw cap. These details help ensure the part mates correctly with OEM brake plumbing and mounting points.

• Inside bore diameter: 0.75 inch (3/4") for listed models except select 2016–2017 Yaris
• Brake inlet thread: M10 x 1.0; thread diameter 10 mm
• Material: durable cast iron for longevity and resistance to deformation
• Bleeder screw included; cap not included

How do I confirm this is the right replacement for my vehicle?

Before purchasing, check your vehicle year, model, and whether the rear brakes are drum-style. Use OEM reference numbers and measurements to cross-check fitment; this reduces the chance of ordering the wrong part.

• Compare OEM reference numbers: W610156, WC370146, 4757002020 and related numbers
• Confirm rear drum configuration and inside diameter (0.75") on your current cylinder
• Enter your vehicle details in the listing’s vehicle selector to verify fit
• Contact seller with VIN or part photographs if you’re unsure

Who is this for? This A-Premium rear drum brake wheel cylinder is aimed at DIY mechanics, independent repair shops, and fleet owners who need an OEM-style replacement for rear drum brake systems on specified Toyota and Scion vehicles. If your car uses rear drum brakes and matches the listed models or OEM part numbers, this unit offers a cost-effective option with a manufacturer warranty. For vehicles not listed or for disc rear brakes, choose the appropriate replacement part. Always follow vehicle service manuals and safety procedures when replacing brake components, and have brakes bled and inspected after installation.