Since S859 primarily corresponds to parking brake shoes, please note the following points during purchase and installation to avoid common mistakes:
Key Dimensions: Always confirm that the old part has an inner diameter of 170 mm and a lining width of 33 mm or 40 mm – these are the basics for fitment. Note that on some models like Toyota 4Runner, Scion xB, and certain Honda models, the dimensions may be 200 mm × 40 mm, which differs.
Replace in Pairs for Safety: To ensure balanced parking brake force on the rear axle, always replace all 4 shoes on both sides simultaneously. One standard set meets this requirement.
Inspect Brake Discs: When replacing shoes, always inspect the drum surface (the inside of the rear disc) for excessive wear or grooves. Since the parking drum is integral to the disc, damage requires replacement of the entire brake disc assembly.
Verify Physical Dimensions: Although S859 generally corresponds to a 170 mm inner diameter, some applications like the 4Runner and specific EBC kits use 200 mm – always verify against your vehicle or other references.
