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 capability and highway stability. Emissions compliance was achieved through a three-way catalytic converter and cooled exhaust gas recirculation (EGR), meeting U.S. EPA Tier 2 Bin 5 standards, with select export models conforming to Euro 5 regulations (EU Regulation (EC) No 715/2007).
One documented concern is early intake manifold runner control (IMRC) actuator failure, identified in Chrysler Service Information Bulletin 18-014-13. This issue stems from plastic gear wear within the actuator mechanism, leading to improper airflow tuning and reduced low-end torque. Later production revisions included a redesigned actuator with reinforced polymer gears to improve durability.
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 DOHC V6 provides strong mid-range response ideal for towing and highway merging but requires adherence to 10,000 km oil change intervals to prevent phaser and IMRC actuator wear. SAE 5W-20 oil meeting Dodge MS-6395 specification is essential for proper phaser operation and oil pressure stability. Extended idling and short trips can accelerate wear due to thermal cycling. The engine management system is sensitive to fuel quality; use of TOP TIER detergent gasoline is recommended to maintain injector cleanliness. Post-2015 revisions addressed IMRC actuator gear durability; pre-2015 units should be inspected per SIB 18-014-13. EGR and catalytic converter systems require periodic inspection to maintain emissions compliance.
Oil Specs: Requires SAE 5W-20 meeting Dodge MS-6395 (Dodge SIB 18-014-13). Supersedes API SN requirements.
Emissions: U.S. models meet EPA Tier 2 Bin 5 (40 CFR Part 86). Euro 5 applies to export models only (EU Reg 715/2007).
Power Ratings: Measured under SAE J1349 standards. Output varies with fuel octane (minimum 87 AKI).
Dodge Technical Information System (TIS): Docs A39001, A39002, SIB 18-014-13
European Commission Regulation (EC) No 715/2007
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine ID tag mounted on the left-side cylinder head near the intake manifold (Dodge TIS A39015). The 8th VIN digit indicates engine type ('X' for EXN series). Pre-2015 models have silver valve covers with black cam covers; post-2015 units use black valve covers. Critical differentiation from Pentastar: EXN uses dual timing chains with phasers on both cams, while Pentastar uses a single chain with intake phaser only. Service parts require production date verification - IMRC actuators for engines before 08/2014 are incompatible with later units due to internal redesign (Dodge SIB 18-014-13).
The EXN's primary reliability risk is IMRC actuator failure on early builds, with elevated incidence in mixed driving conditions. Internal Chrysler data from 2014 reported a notable share of pre-2015 engines requiring actuator replacement before 100,000 km, while U.S. NHTSA records link a significant portion of check-engine-light incidents to airflow control faults in urban-driven SUVs. Frequent cold starts and stop-start cycles increase actuator stress, making inspection and timely replacement critical.
Analysis derived from Dodge technical bulletins (2012-2016) and U.S. NHTSA failure statistics (2013-2017). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DODGE EXN.
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