R1 Concepts 2551-2305-00 Disc Brake Pad Set - Rear

Rear Brake Pads for Select Lexus and Toyota Models

R1 Concepts R1 Optimum OE Pads part number 2551-2305-00 are rear disc brake pads for a wide range of Lexus and Toyota vehicles. This OE-style pad set is built for direct rear brake service on select RX, NX, IS, RC, TX, RZ, Sienna, Highlander, RAV4 Prime, bZ4X, Solterra, and related applications.

The R1 Optimum OE Pads line focuses on factory-style fitment for everyday braking service. If you are replacing worn rear pads on a 2021-2026 Toyota Sienna or a 2022-2025 Lexus NX350, this pad set provides a straightforward replacement option for the rear axle.

Key Features

• R1 Concepts R1 Optimum OE Pads rear disc brake pad set
• Part number 2551-2305-00
• Rear position fitment for select Lexus and Toyota vehicles
• OE-style replacement for daily driving brake service
• Fits multiple hybrid, plug-in hybrid, and gas applications
• Compatible with select Subaru Solterra and Toyota bZ4X rear brake applications

Detailed Fitment and Application

Compatible With rear brake service on 2020-2026 Toyota Highlander, 2021-2026 Toyota Sienna, 2021-2024 Toyota RAV4 Prime, 2023-2025 Toyota bZ4X, 2024-2025 Toyota Grand Highlander, and 2025-2026 Toyota Crown Signia. It also fits rear applications on 2021-2025 Lexus IS300, IS350, RC300, and RC350, plus 2022-2025 Lexus NX250, NX350, NX350h, and NX450h+.

Additional rear fitment includes 2023-2026 Lexus RX350 and RX350h, 2024-2026 Lexus RX450h+, 2023-2025 Lexus RZ450e, 2024-2025 Lexus RZ300e, 2023-2025 Subaru Solterra, and 2024-2026 Lexus TX500h and TX550h+. Select 2026 applications also include Lexus RZ350e, RZ550e, TX350, Toyota bZ, and Toyota Grand Highlander, with notes for F-Sport Handling, Except MAX, and replacement full cast disc applications where listed.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Part Helps Address

• Rear brake pad wear
• Squealing or noisy rear brakes caused by worn friction material
• Reduced braking response from thin or uneven pads
• Brake vibration related to pad condition
• Service replacement for rear disc brake maintenance

Installation Notes and Tips

Verify rear axle fitment by year, make, model, and notes before ordering. Match the vehicle configuration carefully on Lexus RX500h, IS500, TX350, and Toyota Grand Highlander applications, since some listings include full cast disc, replacement disc, F-Sport Handling, or Except MAX notes. Inspect rotors, calipers, and pad hardware condition during brake service and follow the vehicle manufacturer’s brake bedding procedure after installation.

Quality Assurance

R1 Concepts manufactures the R1 Optimum OE Pads line as an OE-style brake pad solution for direct replacement service on supported Lexus and Toyota rear brake applications.