RM 31 is the society's only operating railcar and is one of four preserved railcars of the Standard class. The PRS is actively restoring RM 5, which has had to be largely rebuilt due to its rotten wooden frame, and RM 121. Parts of RM 119 and RM 133 are being used on RM 121. It used to be believed that no 88 seater railcar would survive for preservation, but the PRS and the RM 133 Trust recovered RM 133 from its resting place at Auckland International Airport where it had been used by the rescue services for training. As both ends were affected by a fire, it has subsequently been decided to dedicate all efforts to the restoration of RM 121. Both ends of RM 121 have now been recovered and other parts have been sourced from the remnants of RM 133 and RM 119. The society aims to fully rebuild an operational 88 seater.