The Chrysler EZH is a 2,429 cc, inline‑four petrol engine produced between 2001 and 2006. It features a cast iron block, aluminum cylinder head, dual overhead camshafts (DOHC), and 16 valves. This iteration introduced variable valve timing (VVT) on the intake camshaft, enhancing low — end torque and emissions control while maintaining 150 hp output.
Fitted to the JR platform Chrysler Sebring, Dodge Stratus, and the MY2001–2006 Cirrus facelift, the EZH was engineered fo…
Production years 2001–2006 meet US Federal Tier 2 emissions standards (EPA Certification #AID-01-02).
The Chrysler EZH is a 2,429 cc inline‑four petrol engine engineered for mid‑size sedans (2001-2006). It combines DOHC 16-valve architecture with intake variable valve timing (VVT) to deliver improved low-end torque and fuel efficiency. Designed to meet US Federal Tier 2 emissions standards, it offers a balance of refinement and adequate power for daily driving.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,429 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 87.5 mm × 101.0 mm | |
Power output | 150 hp (112 kW) @ 5,500 rpm | |
Torque | 165 lb-ft (224 Nm) @ 4,000 rpm | |
Fuel system | Sequential multi-port fuel injection (SFI) | |
Emissions standard | US Federal Tier 2 | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | Unavailable |
The Chrysler EZH was used across Chrysler's JR platform with transverse mounting. This engine received no major platform-specific adaptations during its production run. All applications are documented in OEM service manuals.
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The EZH's primary reliability risk is VVT solenoid failure due to oil sludge, with elevated incidence in vehicles subjected to extended oil change intervals. Chrysler TSB 09-012-04 documents this as a known concern, while owner reports frequently cite the issue. Neglecting oil changes accelerates solenoid clogging, making adherence to the maintenance schedule critical.
Analysis derived from Chrysler technical bulletins (2001-2006) and owner-reported failure data (2001-2023). 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 EZH can be reliable long-term if critical maintenance, especially the 60,000-mile timing belt replacement and frequent oil changes for the VVT system, is performed. Addressing the known VVT solenoid issue proactively is key. With proper care, these engines can exceed 200,000 miles.
The most common documented problems are VVT solenoid clogging (TSB 09-012-04), timing belt failure if neglected, oil sludge from infrequent changes, and intake manifold gasket leaks. The VVT system is the primary differentiator from earlier engines.
The EZH 2.4L DOHC VVT engine was used in the Chrysler Sebring (2001-2006), Dodge Stratus (2001-2006), and the facelifted Chrysler Cirrus (2001-2006). It was the standard or optional engine in mid-to-high trim levels of these JR-platform sedans.
Minor power gains are possible with a cold air intake and exhaust, but the EZH has limited tuning potential. The ECU is not easily remappable, and the naturally aspirated design with VVT offers little headroom. Significant power increases are not practical without forced induction.
Fuel economy is similar to its predecessor. Expect approximately 20 mpg city and 28 mpg highway in a typical Sebring or Stratus. Real-world combined figures usually range between 22-24 mpg, with the VVT system providing marginal improvements in urban driving.
Yes. The Chrysler EZH is an interference engine. If the timing belt breaks or jumps time, the pistons will collide with the open valves, causing severe and expensive internal engine damage. Timely belt replacement is non-negotiable.
Chrysler specifies API SL (or higher) 5W-30 motor oil for the EZH engine. Using the correct viscosity and quality oil is absolutely crucial to prevent sludge buildup and ensure the proper operation of the variable valve timing solenoid.
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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