With a quantity of two pieces, the Seal,piston is the most used part in the REAR CALIPER (MODEL P/R/S/T) diagram.
The sub assemblies and components that make up this Rear Caliper (model P/r/s/t) include this Caliper Assembly,rear, the most expensive part.
The most reasonably priced component used on the Gs500e 1990 (l) (e01 E02 E04 E15 E16 E17 E21 E22 E24 E25 E34 E39 Rear Caliper (model P/r/s/t) is the Bolt.