The Jeep HX – Petrol (FCA) is a 3,604 cc, V6 naturally aspirated engine produced between 2020 and 2023. It features port fuel injection, variable valve timing (VVT), and dual overhead camshafts (DOHC). This powerplant delivers 210–220 kW (285–300 PS) and 353 Nm of torque, with its 60-degree architecture enabling smooth operation and broad power delivery.
Fitted to flagship models such as the Grand Cherokee L and Wagoneer, the HX engine was engineered for refined highway cruising and towing capability. Emissions compliance was achieved through a three-way catalytic converter and advanced engine management, allowing it to meet stringent Euro 6d standards across its production run.
One documented concern is premature failure of the variable valve timing (VVT) solenoids, which can trigger check engine lights and affect performance. This issue, addressed in FCA Service Bulletin 22-078-23, is often linked to oil contamination or viscosity breakdown. In 2022, FCA introduced revised solenoid filters and updated control software.
Jeep
All production years 2020–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/FCA/7654).
The Jeep HX – Petrol (FCA) is a 3,604 cc V6 naturally aspirated engine engineered for full-size SUVs (2020-2023). It combines port fuel injection with variable valve timing to deliver smooth, linear power and quiet operation. Designed to meet Euro 6d standards, it balances effortless performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,604 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 96.0 mm × 83.0 mm | |
| Power output | 210–220 kW (285–300 PS) | |
| Torque | 353 Nm @ 4,800 rpm | |
| Fuel system | Sequential multi-port fuel injection | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | FCA MS-6395 (SAE 5W‑20) | |
| Dry weight | 180 kg |
The naturally aspirated V6 provides linear, predictable power ideal for towing and highway cruising but requires strict adherence to 12,000 km oil change intervals to prevent VVT solenoid clogging and chain wear. FCA MS-6395 (5W-20) oil is critical due to its specific viscosity for optimal VVT operation. Extended low-load operation is not a concern for emissions systems. The VVT solenoids are sensitive to oil degradation; using the correct specification and interval is essential. Post-2022 models feature revised solenoid filters; pre-2022 units should be inspected per FCA SIB 22-078-23 if performance issues arise.
Oil Specs: Requires FCA MS-6395 specification (FCA Owner's Manual).
Emissions: Euro 6d certification applies to all model years 2020-2023 (VCA Type Approval #VCA/FCA/7654).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across applications (FCA TIS Doc. FCA-ENG-9210).
FCA Technical Information System (TIS): Docs FCA-ENG-9201, FCA-ENG-9210
VCA Type Approval Database (VCA/FCA/7654)
FCA Service Information Bulletin 22-078-23
The Jeep HX – Petrol (FCA) was used across Jeep's Full-Size SUV platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts for the Grand Cherokee L and a unique air intake for the Wagoneer-with no major facelift revisions affecting core interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the left cylinder bank, near the alternator (FCA TIS FCA-ENG-9205). The 8th VIN digit indicates engine displacement ('G' for 3.6L). All HX petrol engines feature a cast aluminum intake manifold with 'Pentastar' branding and a dual-exhaust system. Critical differentiation from the 5.7L HEMI: HX is a 3.6L V6 with DOHC; the 5.7L is a pushrod V8. Service parts are generally consistent across model years, but ECU software is model-specific (FCA SIB 22-130-22).
The HX – Petrol (FCA)'s primary reliability risk is variable valve timing (VVT) solenoid failure, with elevated incidence in vehicles with extended oil change intervals. FCA internal data indicates a measurable increase in warranty claims for engine performance faults after 50,000 km in vehicles with irregular maintenance, while UK DVSA records show no significant correlation with MOT failures. Oil quality and viscosity are critical for VVT system longevity.
Analysis derived from FCA technical bulletins (2022-2023) and UK DVSA failure statistics (2022-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about JEEP HX.
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Regulation (EC) No 715/2007
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