Merits Pioneer 5 (S534/S53431) Scooter Parts

This page covers replacement parts for the Merits Pioneer 5 (S534/S53431) mobility scooter. Parts include battery packs, the on-board charger, a charging port, tires and tubes, wheel assemblies, the motor, transaxle and brake, a controller, throttle and speed pots, key switches and keys, armrests and pads, and a basket.

The Pioneer 5 requires two 12V 14 Ah batteries; the packs we list are 12 Ah and 15 Ah, and 12 Ah batteries are a compatible alternative. It uses an on-board charger, so off-board chargers are not suitable. Tires are 8"x2" (200x50). The controller, motor brake and S534 rear wheel are shared with the Pioneer 5 DLX (S541); check whether you have the S534 or S53431. The model number is on a label on the frame, usually under the seat. As an authorized Merits dealer, we supply genuine OEM Merits parts, with compatible alternatives on select items. Can't find your part? Contact us with your model number and a photo of the old part, and our team will help track it down.