2021 Toyota 4Runner Master Cylinder — Part # N107761 — Aesop Auto-Knox Auto Parts of Knoxville-PRP Freight · Knoxville, TN

When replacing the master cylinder on your 2021 Toyota 4Runner, consider the drivetrain configuration as a key factor. This listing features a B-grade master cylinder specifically from a rear-wheel-drive (RWD) model. The master cylinder is a critical component in your vehicle's braking system, responsible for converting pedal pressure into hydraulic force to engage the brakes. A B-grade part suggests it has been inspected and is in good used condition but may show minor wear or cosmetic imperfections compared to new or A-grade parts. This master cylinder is sourced directly from a 2021 Toyota 4Runner, ensuring it matches the original specifications for that model year and drivetrain. However, buyers should verify compatibility with their specific vehicle configuration, including brake system type and any optional equipment, as variations can exist even within the same model year. Before purchasing, compare this part to your existing master cylinder, noting any differences in mounting points, reservoir size, and connector fittings. The seller's stock identifier N107761 can be used to reference this exact unit when communicating or searching for more details. For additional information on similar components or to explore options, visit the Master Cylinder category or browse other Toyota parts and 4Runner parts. Taking these steps will help ensure you select the right master cylinder for your vehicle's needs.