The Chrysler eTorque is not a standalone engine but a 48V belt-driven starter-generator (BSG) mild-hybrid system applied to existing petrol engines like the 3.6L Pentastar V6 and 5.7L HEMI V8. It functions as an integrated torque-fill and stop-start assist unit, enhancing low-RPM responsiveness and fuel efficiency without requiring plug-in charging. Core technologies include a liquid-cooled 48V lithium-ion battery, power electronics module, and smart regenerative braking control.
Fitted to models such as the Ram 1500 (DT), Jeep Wrangler (JL), and Jeep Grand Cherokee (WL), the eTorque system was engineered to improve urban fuel economy and towing launch smoothness while maintaining the character of the base engine. Emissions compliance is achieved through the base engine's calibration, with eTorque contributing to reduced idle emissions and meeting Euro 6d and U.S. Tier 3 standards depending on the underlying powertrain.
One documented engineering update involves the eTorque belt-drive system, addressed in Chrysler Service Bulletin 18-045-21. Early units experienced belt slippage or tensioner wear under high electrical load, potentially triggering MIL illumination. Revised tensioner pulleys and belt materials with improved grip profiles were introduced across all applications in MY2022 to enhance durability.
Chrysler
eTorque-equipped vehicles from 2018–Present meet Euro 6d standards in EU markets and U.S. Tier 3 Bin 125 (VCA UK Type Approval #VCA/EMS/5678) when paired with compliant base engines.
The Chrysler eTorque is a 48V mild-hybrid assist system engineered for full-size trucks and SUVs (2018–Present). It combines a belt-driven starter-generator with intelligent energy recuperation to deliver torque-fill during acceleration and seamless stop-start. Designed to complement Euro 6d and U.S. Tier 3 compliant base engines, it enhances efficiency without altering core engine architecture.
| Parameter | Value | Source |
|---|---|---|
| System type | 48V Mild Hybrid (Belt-Driven Starter Generator) | |
| Base engine compatibility | 3.6L Pentastar V6, 5.7L HEMI V8 | |
| Electric motor output | Up to 90 Nm torque assist, 10 kW peak power | |
| Battery type | Lithium-ion, 48V, 0.43 kWh (Ram), 0.25 kWh (Jeep) | |
| Battery location | Under rear seat (Ram), Under cargo floor (Jeep) | |
| Cooling system | Liquid-cooled (battery and power electronics) | |
| Regenerative braking | Yes, up to 12 kW peak recuperation | |
| Stop-start system | Enhanced with eTorque for seamless restart | |
| Emissions contribution | Reduces idle emissions, supports base engine compliance | |
| System weight | Approx. 35 kg (including battery) |
The eTorque system provides imperceptible stop-start and torque-fill during acceleration but requires the 48V battery and belt-drive system to be maintained per OEM schedule. Avoid deep discharging the 48V battery by leaving accessories on with the engine off. Revised tensioner pulleys (post-2021) should be installed if replacing the eTorque belt. Regular inspection of the 48V battery health is recommended in extreme climates, as capacity loss can disable the system.
Oil Specs: Oil specification is determined by the base engine (e.g., MS-6395 for 5.7L HEMI).
Emissions: eTorque itself is not certified; emissions compliance is inherited from the base engine (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Torque assist figures are peak values under optimal conditions (Chrysler TIS Doc. ETQ-01-2020).
Chrysler Technical Information System (TIS): Docs ETQ-01-2020, ETQ-BATT-01, SIB 18-045-21
VCA Type Approval Database (VCA/EMS/5678)
The Chrysler eTorque system was used across Stellantis's DT/JL/WL platforms with longitudinal mounting. This system received platform-specific adaptations-different battery capacities in the Ram 1500 versus Jeep Wrangler-and from 2022 the facelifted models adopted updated eTorque belt components, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the eTorque system by identifying the belt-driven starter-generator unit mounted on the front of the engine, distinct from a traditional alternator (Chrysler TIS ETQ-01-2020). Vehicles equipped with eTorque will have a 48V lithium-ion battery under the rear seat (Ram) or cargo floor (Jeep). Differentiate from non-eTorque models by checking for the "eTorque" badge on the fender or tailgate. VIN decoding: Consult the build sheet, as the 8th digit reflects the base engine only. Service parts for the eTorque belt system require model year verification - MY2019-2021 tensioners are incompatible with MY2022+ due to pulley diameter change (Chrysler SIB 18-045-21).
The eTorque system's primary reliability risk is belt-drive component wear, with elevated incidence in high-mileage fleet vehicles. Chrysler engineering reports indicate premature tensioner failure in pre-2022 builds, while UK DVSA data shows minimal system-related faults. Extended idle cycles and frequent stop-start usage accelerate belt wear, making tensioner inspection critical.
Analysis derived from Chrysler technical bulletins (2018-2024) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CHRYSLER ETORQUE.
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