R1 Concepts ceramic brake pads for 2004–2010 Toyota Sienna rear applications use a premium ceramic formulation that the source describes as quieter, smoother, and longer lasting with reduced dust. These rotor-friendly, low-copper, asbestos-free pads are presented as plug-and-play rear replacements recommended for passenger vehicles and light-duty trucks and specified for daily use in the listed Sienna years.
R1 04-10 Toyota Sienna Rear R1 Ceramic Brake Pads