The Jeep 552 80 444 is a 2,987 cc, 60 — degree V6 turbo — diesel engine produced between 2014 and 2018. It features a DOHC 24 — valve layout, common rail direct injection, and a variable geometry turbocharger (VGT), delivering 184 kW (250 PS) and 600 Nm of torque for enhanced towing and highway performance. The twin — turbo configuration provides strong, linear power delivery ideal for heavy loads and high — speed cruising.
Fitted primarily to the WK2 Grand Cherokee SRT and certa…
All production years (2014–2018) meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/6789).
The Jeep 552 80 444 is a 2,987 cc V6 turbo-diesel engineered for high-performance SUV applications (2014–2018). It combines twin-turbocharging with common-rail direct injection to deliver exceptional torque and smooth power. Designed to meet stringent Euro 6 emissions standards, it prioritizes performance without compromising environmental compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,987 cc | |
Fuel type | Diesel | |
Configuration | 60° V6, DOHC, 24-valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 89.0 mm × 80.0 mm | |
Power output | 184 kW (250 PS) | |
Torque | 600 Nm @ 1,600–2,600 rpm | |
Fuel system | Bosch CP4.2 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 16.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Twin variable-geometry turbos (Honeywell) | |
Timing system | Chain-driven (front-mounted) | |
Oil type | Fiat 9.55535-S2 (SAE 5W-30) | |
Dry weight | 252 kg |
The Jeep 552 80 444 – Diesel (Fiat Powertrain) was developed for Jeep's high-performance WK2 platform with longitudinal mounting and is not licensed for other manufacturers. This engine received specific adaptations-a reinforced crankshaft and upgraded cooling system for the Grand Cherokee SRT-and from 2017 the EGR cooler was revised, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The 552 80 444's primary reliability risk is low-pressure EGR cooler failure, with elevated incidence in vehicles subjected to frequent high-load operation. Fiat Powertrain internal quality reports indicated a cluster of cooler replacements under warranty for 2014-2016 builds, while UK DVSA data shows turbo-related faults are the second most common issue. Adherence to specified oil change intervals and coolant quality is critical to mitigate these risks.
Analysis derived from Fiat Powertrain technical bulletins (2014–2018) and UK DVSA failure statistics (2016–2023). 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 552 80 444 offers exceptional performance but has known vulnerabilities, primarily the EGR cooler in early models. Vehicles with a full service history using Fiat-spec fluids and fuels can be very durable. The revised cooler (post-2017) significantly improves long-term prospects, making later models more desirable.
The most frequent issues are failure of the low-pressure EGR cooler, turbocharger actuator faults, AdBlue system malfunctions, and wear on the high-pressure fuel pump. These are well-documented in Fiat Powertrain service bulletins and are often linked to maintenance practices or component design in early production.
This high-output diesel engine was used exclusively in the Jeep Grand Cherokee (WK2) from 2014 to 2018, primarily in the SRT trim and certain Overland variants in international markets. It was marketed as the top-tier '3.0L V6 Turbo Diesel' option.
Yes, the engine has significant tuning potential. Stage 1 ECU remaps can safely increase power to 200–220 kW and torque to 650–700 Nm. More aggressive tunes require upgraded components. Ensure the EGR cooler and fuel system are in perfect condition before tuning to avoid accelerated failure.
Fuel economy is reasonable for a high-performance V6 diesel SUV. Expect combined figures of approximately 9.0–10.0 L/100km (28–31 mpg UK) for the Grand Cherokee SRT. Real-world consumption will vary significantly based on driving style, with spirited driving yielding higher figures.
Yes. This is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. The timing chain is designed to be durable, but proper oil maintenance is essential.
Fiat Powertrain mandates the use of Fiat 9.55535-S2 specification oil, typically a 5W-30 synthetic. This specific low-SAPS formulation is critical for protecting the emissions systems (DPF, SCR) and turbochargers. Using non-approved oil can lead to system blockages and is not covered under warranty.
Comprehensive technical documentation and regulatory references
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JEEP Official Site
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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
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