The Dodge EZS is a 3,970 cc, V8 gasoline engine produced between 2018 and 2023. Developed as part of the Chrysler HEMI family, it features dual overhead camshafts (DOHC), variable valve timing (VVT), and port fuel injection with optional cylinder deactivation. In standard tune, it delivers 375 kW (510 PS) and 644 Nm of torque, providing high-performance capability in muscle car and performance SUV applications.
Fitted to the Dodge Challenger SRT Hellcat and Charger SRT Hellcat, the EZS was engineered for maximum power delivery and track-ready performance. It meets U.S. EPA Tier 2 Bin 5 and Euro 6 emissions standards through advanced exhaust gas recirculation (EGR), a high-flow three-way catalytic converter, and precise air-fuel ratio control via wideband oxygen sensing. The supercharged design enables rapid throttle response and sustained high-RPM power output.
One documented concern is premature supercharger pulley bearing wear, particularly in 2018–2020 units operating under frequent wide-open-throttle conditions. This issue, referenced in Dodge Service Information Bulletin 18-022-20, results in whining noises and potential belt slippage. From 2021 onward, a revised bearing assembly and updated duty cycle monitoring were implemented to improve durability.
Production years 2018–2023 meet U.S. EPA Tier 2 Bin 5 and Euro 6 standards (VCA UK Type Approval #VCA/EMS/7890).
The Dodge EZS is a 3,970 cc V8 gasoline engine engineered for high-performance muscle cars and sedans (2018–2023). It combines a roots-type supercharger with variable valve timing to deliver aggressive acceleration and track-focused power delivery. Designed to meet Tier 2 Bin 5 and Euro 6 standards, it balances extreme performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,970 cc | |
| Fuel type | Gasoline | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Supercharged (IHI TVS2650) | |
| Bore × stroke | 101.6 mm × 92.0 mm | |
| Power output | 375 kW (510 PS) @ 6,200 rpm | |
| Torque | 644 Nm @ 4,200 rpm | |
| Fuel system | Sequential port fuel injection | |
| Emissions standard | U.S. EPA Tier 2 Bin 5 / Euro 6 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water-cooled | |
| Valvetrain | DOHC, dual VVT (intake and exhaust) | |
| Timing system | Timing chain (dual-row, front-mounted) | |
| Oil type | Mopar SAE 5W-20 (MS-6395) | |
| Dry weight | 248 kg |
The EZS's supercharged design provides aggressive throttle response ideal for performance driving but demands strict adherence to 10,000 km oil change intervals using Mopar MS-6395 5W-20 oil to protect the timing chain and supercharger bearings. Use of 91 AKI (RON 95) premium fuel is required to prevent detonation under boost. Supercharger pulley bearing wear is common in 2018–2020 models; inspection per Dodge SIB 18-022-20 is advised. Cylinder deactivation system (Active Fuel Management) may develop lifter wear after 80,000 km, requiring periodic oil analysis. EGR and catalytic converter efficiency should be monitored to avoid misfire codes and emissions test failures.
Oil Specs: Requires Mopar SAE 5W-20 (MS-6395) specification (Dodge SIB 18-022-20). Substitutes must meet MS-6395 standard.
Emissions: Euro 6 certification applies to all export models (2018–2023) (VCA Type Approval #VCA/EMS/7890). U.S. models meet EPA Tier 2 Bin 5.
Power Ratings: Measured under SAE J1349. Output varies slightly between Challenger and Charger due to intake tuning (Dodge TIS D/EZS/PERF/010).
Dodge Technical Information System (TIS): Docs D/EZS/ARCH/002, D/EZS/SUP/003, SIB 18-022-20
VCA Type Approval Database (VCA/EMS/7890)
SAE International: J1349 Engine Power Certification Standards
Chrysler HEMI Engineering: H8-4000-ME
The Dodge EZS was used across Dodge's Challenger SRT Hellcat and Charger SRT Hellcat platforms with longitudinal mounting. This engine received platform-specific adaptations-tuned intake manifolds in the Challenger and reinforced engine mounts in the Charger-and from 2021 the updated supercharger hardware introduced revised pulley bearing materials, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the right-side engine block near the exhaust manifold (Dodge TIS D/EZS/ID/005). The 8th VIN digit indicates engine type ('H' for EZS series). Pre-2021 models have silver supercharger housings with black pulleys; post-2021 units feature all-black pulley assemblies. Critical differentiation from HEMI ESS: EZS uses Bosch EDC17CP45 ECU with trapezoidal diagnostic connector, while ESS uses EDC17CP14. Service parts require model-year verification—supercharger bearings and intake manifolds are not interchangeable between pre- and post-2021 models (Dodge SIB 18-022-20).
The EZS's primary reliability risk is supercharger pulley bearing failure in early builds, with elevated incidence in track-focused use. Internal Dodge data from 2020 reported a significant share of pre-2021 engines requiring bearing replacement before 80,000 km, while UK DVSA records link emissions-related failures to EGR and catalytic converter degradation in high-mileage units. Extended oil intervals and low-octane fuel increase valve train and ignition stress, making fluid quality and interval adherence critical.
Analysis derived from Dodge technical bulletins (2018-2022) and UK DVSA failure statistics (2019-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DODGE EZS.
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