Three-Electric System Warranty

The Three-Electric System Warranty is a dedicated coverage package offered by new energy vehicle (BEV and PHEV) manufacturers for their three core electric powertrain assemblies—the high-voltage traction battery, drive motor, and motor control unit (MCU). As these critical components directly dictate the vehicle's driving range, power delivery, and core safety, and command substantial repair or replacement costs, this warranty serves as a primary buying consideration among EV car buyers, with its coverage scope and exclusion clauses strictly regulated under sales agreements.

Core Coverage Scope and Warranty Standards

The core warranty coverage primarily addresses the hardware functionality, manufacturing defects, and performance degradation of the three core powertrain assemblies: 

Core Assembly Hardware and System-Level Fault Coverage: 

The warranty explicitly covers mechanical and electrical breakdowns of the traction battery pack (including individual cells, modules, battery management system (BMS), and high-voltage wiring harnesses), drive motor unit, and inverter/MCU under normal operating conditions. In the event of non-user-induced faults, high-voltage insulation failures, sealed housing leaks, or sudden loss of drive, carmakers or their authorised service centres are obligated to inspect, repair, or replace the affected components free of charge under warranty terms. 

Battery Capacity Degradation Threshold and Industry Benchmarks: 

Addressing buyers' top concern over high-voltage battery health, the warranty terms clearly define an acceptable battery capacity degradation threshold. Manufacturers typically guarantee that over a set period or mileage cap, should the battery State of Health (SOH) fall below a defined threshold through natural degradation (industry standards generally benchmark this at 70% or 75% remaining capacity), the authorised distributor will inspect and either repair or replace the battery pack or defective modules at no cost. 

Safety Protocols and Warranty Exclusions 

Prohibition of Unauthorized Modifications, Tampering, and Non-Genuine High-Power Add-ons to Claim Warranty Coverage:

EV powertrains are highly integrated systems operating on lethal high voltages. Unauthorised modifications, tapping into high-voltage lines outside authorised service centres, aftermarket high-power accessory fitments, or BMS software tampering are strictly prohibited. Carmakers reserve full legal rights to void the three-electric warranty and decline claims for any fried circuits, damaged electronics, or battery thermal runaway arising from unauthorised tampering.

Prohibition of Concealing Physical Underbody Impact, Water Ingress, or Collision Damage to Lodge Regular Warranty Claims:

The three-electric warranty is strictly underwritten for manufacturing defects and normal wear and tear; it explicitly excludes physical destruction stemming from external impact, flash floods, or gross negligence. Masking undercarriage strikes or battery pack water submersion to lodge standard warranty claims is strictly barred. On-board telematics and the BMS log comprehensive crash and operational fault data; fraudulent or non-compliant claims will be rejected outright, and driving a structurally compromised EV risks catastrophic thermal runaway, fire, and severe electric shock hazards.