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 certain international-market models, the 552 80 444 was engineered for drivers demanding maximum diesel performance with refined operation. Emissions compliance for all units was achieved through a diesel particulate filter (DPF) and selective catalytic reduction (SCR) with AdBlue, meeting Euro 6 standards (VCA UK Type Approval #VCA/EMS/6789).
One documented concern is premature failure of the low-pressure EGR cooler, which can lead to coolant contamination and overheating. This issue, highlighted in Fiat Powertrain Service Bulletin FPT-SB-2016-03, is often linked to internal corrosion and thermal fatigue. In 2017, a revised cooler design with improved materials was introduced for production.
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 twin-turbo setup delivers exceptional low-end torque and high-altitude performance but demands strict 15,000 km oil change intervals using Fiat 9.55535-S2 (5W-30) to protect turbo bearings and the high-pressure fuel system. Ultra-low-sulfur diesel (EN 590) is mandatory to prevent CP4.2 pump failure. The AdBlue/SCR system requires periodic refills; neglect can trigger limp mode. The revised EGR cooler (post-2017) should be installed during replacement per FPT-SB-2016-03. DPF regeneration is frequent under urban driving.
Oil Specs: Requires Fiat 9.55535-S2 (5W-30) specification (Fiat Powertrain SIB FPT-SB-2016-03). Equivalent to ACEA C2.
Emissions: Certified to Euro 6 standards for all model years (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across model years (Fiat Powertrain Group Specification FPT-GS-002).
Fiat Powertrain Technical Information: Docs FPT-TM-103, FPT-ER-204, SIB FPT-SB-2016-03
VCA Type Approval Database (VCA/EMS/6789)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on a flat boss on the left-hand side of the engine block, just below the cylinder head (Fiat Powertrain TIS FPT-TIS-006). The 8th digit of the VIN is typically '9' for this high-output diesel V6. All models feature black intake manifolds and twin turbochargers visible from above. Critical differentiation from the 552 63 088: Higher power output (250 PS vs 241 PS), twin-turbo setup, and specific 'SRT' or '3.0L V6 TURBO DIESEL' badging. Service parts for the EGR system require model year verification as pre-2017 and post-2017 coolers are not interchangeable (Fiat Powertrain SIB FPT-SB-2016-03).
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.
Find answers to most commonly asked questions about JEEP 552-80-444.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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