The Dodge EXN is a 3,950 cc, V6 gasoline engine produced between 2012 and 2016. It features dual overhead camshafts (DOHC), variable valve timing (VVT), and sequential fuel injection. Designed for mid — size SUV and light — truck applications, it delivered 220 kW (299 PS) and 385 Nm of torque, offering strong towing capability and responsive on — road performance.
Fitted to models such as the Dodge Durango and Ram 1500, the EXN engine was engineered for versatile all — terrain…
Production years 2012–2014 meet U.S. EPA Tier 2 Bin 5; 2015–2016 models comply with Euro 5 standards in export markets (EU Regulation (EC) No 715/2007).
The Dodge EXN is a 3,950 cc V6 gasoline engine engineered for mid-size SUVs and light trucks (2012–2016). It combines DOHC architecture with variable valve timing to deliver responsive mid-range power and smooth operation. Designed to meet U.S. EPA Tier 2 and Euro 5 emissions standards, it balances performance with regulated efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,950 cc | |
Fuel type | Gasoline | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 99.0 mm × 85.0 mm | |
Power output | 220 kW (299 PS) @ 6,100 rpm | |
Torque | 385 Nm @ 4,500 rpm | |
Fuel system | Sequential multi-port fuel injection | |
Emissions standard | U.S. EPA Tier 2 Bin 5; Euro 5 (export) | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Dual chain-driven (intake/exhaust phasers) | |
Oil type | SAE 5W-20 (Dodge MS-6395) | |
Dry weight | 204 kg |
The Dodge EXN was used across Dodge's Durango and Ram platforms with longitudinal mounting. This engine received platform-specific adaptations-shorter intake manifolds in the Ram 1500 and revised cooling in the Durango-and from 2015, the updated Durango models adopted reinforced IMRC actuators, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from Dodge technical bulletins (2012-2016) and U.S. NHTSA failure statistics (2013-2017). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The EXN delivers solid performance and towing capability, but early models (2012-2014) had reliability concerns, particularly IMRC actuator failure. Later revisions (post-2015) improved actuator durability, so well-maintained examples can be robust. Regular servicing and using high-quality oil (5W-20 MS-6395) greatly aid longevity.
The biggest issues are IMRC actuator failure (leading to airflow faults), cam phaser wear, coolant leaks from thermostat housing, and ignition coil failures. These are well-documented in Dodge service bulletins and NHTSA filings.
The EXN was primarily used in the Dodge Durango (2012-2016) across SXT, R/T, and Citadel trims. It also appeared in the Ram 1500 (2012-2014) ST and Big Horn models. No passenger car applications were equipped with this engine.
Aftermarket ECU tuning is common on the EXN platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In a Durango, typical consumption is ~15.6 L/100km (city) and ~10.2 L/100km (highway), or about 18 mpg UK combined. Real-world figures vary by load and driving style, but expect 16-20 mpg (UK) on mixed roads for a healthy EXN.
Yes. The EXN is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, causing catastrophic internal damage. Timing system maintenance is critical—any unusual noise should be investigated immediately.
Dodge specifies SAE 5W-20 synthetic oil meeting MS-6395 specification. Use a quality oil designed for modern gasoline engines and change it every 10,000 km to ensure proper phaser and actuator lubrication.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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