158 Jabodetabek Commuter Units Near Retirement as KAI Sizes a 128-Trainset Replacement Program Over Ten Years
Official KAI Commuter data shows 1,164 units in service with 158 beyond operational life; the KAI president director says 86 ex-Japanese trainsets will be retired in stages and 128 new trainsets are needed this decade.
KAI Commuter has quantified the aging of the Jabodetabek commuter fleet in official statements published on 11 and 12 November. As of October 2026 the operator holds 1,164 electric multiple units, of which 1,006 remain usable, arranged into 98 trainsets with 89 available for daily service and nine under maintenance. The remaining 158 units have entered the end of their operational life.
Speaking at a press conference on 10 November, KAI president director Bobby Rasyidin said 86 ex-Japanese trainsets must be retired in stages and that total replacement demand in Jabodetabek over ten years reaches 128 trainsets. Orders in progress include 16 trainsets from the 2023 contract, with the TS-8 series targeted to start operations in December 2026, and a contract for 23 more trainsets, TS-17 to TS-39, to be signed with INKA in December 2026 with deliveries from 2028.
Until the new fleet arrives, service will continue to lean on the aging units, putting peak load on maintenance, airworthiness documentation and life-extension assessments through 2028. KAI has described maintaining 28-year-old stock as unusually demanding, citing short-lived electrical components across hundreds of units.