Mumbai’s public transport operator Brihanmumbai Electric Supply and Transport (BEST) has ordered an extensive safety inspection across its fleet after a recent electric bus fire raised fresh concerns about the condition and maintenance of wet-lease buses operating in the city.
The move comes amid growing scrutiny over technical defects, maintenance practices, and operational safety in Mumbai’s rapidly expanding electric bus network.
Fire Incident Triggered Urgent Action
The latest action follows a fire involving an electric AC double-decker bus at the Kurla depot earlier this week.
According to officials:
- The bus was already out of service due to a technical issue
- The fire reportedly occurred during battery charging and maintenance
- Depot staff initially controlled the blaze before firefighters fully extinguished it
- No injuries were reported
Authorities suspect a possible “thermal incident” linked to the battery system, though a detailed investigation is still underway.
Defects Found in Wet-Lease Buses
BEST officials have now intensified inspections of wet-lease buses after earlier complaints highlighted serious defects in several vehicles.
Reported issues include:
- Steering lock problems
- Brake-related risks
- Poor vehicle condition
- Inadequate maintenance practices
- Repeated breakdowns
Some complaints also alleged that buses were returned to service without proper rectification of faults.
What Are Wet-Lease Buses?
Under the wet-lease model:
- Private operators procure and maintain buses
- Drivers and operational management are also handled by contractors
- BEST pays operators on a per-kilometre basis
The model has helped Mumbai rapidly expand its electric bus fleet without directly purchasing all vehicles. However, critics argue that outsourced maintenance can sometimes create accountability gaps.
BEST Orders Fleet-Wide Checks
Following the recent fire, BEST has directed:
- Immediate inspection of electric buses supplied by contractors
- Verification of maintenance standards
- Technical audits of battery systems and safety mechanisms
Officials say the goal is to ensure commuter safety and prevent further incidents.
Growing Safety Concerns Around E-Buses
The latest incident is not isolated.
In recent years:
- Multiple BEST buses, including CNG and electric vehicles, have reported fire incidents
- The Bombay High Court earlier questioned the lack of practical training for electric bus drivers
Experts say electric buses require:
- Specialized battery monitoring
- Thermal management systems
- Strict charging protocols
- Advanced maintenance expertise
Any lapse in these areas can increase operational risks.
The Bigger Challenge Behind Mumbai’s E-Bus Push
Mumbai is aggressively transitioning toward cleaner public transport, but the incidents highlight a critical challenge:
Fast Electrification vs Maintenance Readiness
While electric buses reduce emissions and fuel costs, the supporting ecosystem must evolve simultaneously:
- Skilled technicians
- Charging infrastructure
- Fire safety protocols
- Predictive maintenance systems
Without these, rapid fleet expansion can strain operational reliability.
Why Wet-Lease Oversight Matters
The wet-lease system improves scalability but also creates a layered responsibility structure:
- Operator maintains buses
- BEST oversees service delivery
- Manufacturers handle technical support
Clear accountability becomes essential when safety incidents occur.
The Road Ahead
BEST and suppliers are expected to:
- Complete fleet-wide inspections within days
- Submit technical findings
- Implement corrective measures before buses return fully to service
The incident may also lead to:
- Stricter maintenance audits
- Enhanced battery safety norms
- More rigorous training for electric bus operations
Technology
The latest electric bus fire has put the spotlight on the challenges of modernising Mumbai’s public transport system at scale. While BEST’s transition toward electric mobility is a major step toward sustainable urban transport, the incident underscores a crucial reality: technology adoption must be matched by equally strong safety and maintenance systems.
