noun
spare parts; replacement parts
Refers to extra components kept on hand for repair or replacement, especially in machinery, electronics, or vehicles.
この機械の予備部品はもう生産されていない。
Spare parts for this machine are no longer produced.
故障に備えて予備部品を注文した。
I ordered spare parts in case of breakdown.
Compound of 予備 (yobi, 'reserve, spare') and 部品 (buhin, 'parts, components').