R1 Concepts 2551-1324-00 Disc Brake Pad Set - Front

Front Brake Pads for Lexus and Toyota

R1 Concepts R1 Optimum OE Pads, part number 2551-1324-00, are front disc brake pads for a wide range of Lexus, Toyota, Subaru, and EV applications. This pad set is built for drivers replacing worn front pads on vehicles such as the Toyota Highlander, Lexus RX350, and Toyota Sienna.

Key Features

• Front disc brake pad set for OE-style replacement service
• R1 Optimum OE Pads line from R1 Concepts
• Fits front brake applications across gas, hybrid, plug-in hybrid, and electric models
• Application-specific coverage for many Lexus RX, NX, TX, and RZ models
• Part number 2551-1324-00 for accurate ordering and lookup

Fitment Coverage

• Fits 2026 Lexus RX350, front; 340mm front disc; R1 Optimum OE Pads
• Fits 2023-2026 Lexus RX350h, front
• Fits 2024-2026 Lexus RX450h+, front
• Fits 2026 Lexus RZ350e, front
• Fits 2026 Lexus RZ550e, front
• Fits 2026 Lexus TX350, front; except F-Sport Handling
• Fits 2026 Toyota bZ, front
• Fits 2025-2026 Toyota Crown Signia, front
• Fits 2024-2026 Toyota Grand Highlander, front
• Fits 2011-2026 Toyota Sienna, front
• Fits 2022-2025 Lexus NX250, front
• Fits 2022-2025 Lexus NX350, front
• Fits 2022-2025 Lexus NX350h, front
• Fits 2022-2025 Lexus NX450h+, front
• Fits 2010-2025 Lexus RX350, front
• Fits 2024-2025 Lexus RZ300e, front
• Fits 2023-2025 Lexus RZ450e, front
• Fits 2024-2025 Lexus TX350, front
• Fits 2024-2025 Lexus TX500h, front
• Fits 2023-2025 Subaru Solterra, front
• Fits 2023-2025 Toyota bZ4X, front
• Fits 2008-2025 Toyota Highlander, front
• Fits 2021-2024 Toyota RAV4 Prime, front
• Fits 2018-2022 Lexus RX350L, front
• Fits 2010-2022 Lexus RX450h, front
• Fits 2018-2022 Lexus RX450hL, front
• Fits 2018-2021 Lexus NX300, front
• Fits 2015-2021 Lexus NX300h, front
• Fits 2015-2017 Lexus NX200t, front

Detailed Description

R1 Concepts 2551-1324-00 is a front disc brake pad set in the R1 Optimum OE Pads line, made for direct replacement service on many late-model Lexus and Toyota platforms. Coverage includes popular SUV and crossover applications such as the Lexus RX350, Lexus NX series, Toyota Highlander, Toyota Sienna, and Toyota RAV4 Prime, along with newer hybrid and battery-electric models including the Toyota bZ4X, Subaru Solterra, and Lexus RZ variants. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Replacement Reasons

• Front brake pads worn below service limits
• Squealing, grinding, or uneven brake noise from the front axle
• Reduced braking response during daily driving
• Brake dust buildup from aging pad material
• Need for OE-style front pad replacement on Lexus RX350, Toyota Highlander, or Toyota Sienna

Installation Notes and Tips

Confirm rotor size and trim before ordering, especially on 2026 Lexus RX350 applications with 340mm front discs and 2026 Lexus TX350 models that exclude F-Sport Handling. Inspect rotors, calipers, and pad hardware condition during service, and verify the front axle orientation before installation. Use the vehicle fitment list above to match the exact year, make, model, and position.

Quality Assurance

R1 Concepts positions the R1 Optimum OE Pads line as an OE-style brake pad solution for everyday replacement service. Part number 2551-1324-00 is cataloged for the confirmed front applications listed here.