The Honda K24Z4 is a 2,354 cc, inline‑four naturally aspirated petrol engine produced between 2013 and 2017. It features a dual overhead camshaft (DOHC) 16‑valve design with Honda's i — VTEC system engaging at 5,800 rpm and PGM‑FI fuel injection. This configuration prioritizes broad torque delivery and high — RPM power, making it ideal for performance — oriented mid — size applications.
Fitted primarily to the ninth — generation (FB) Honda Accord for the North American ma…
Honda
Production years 2013–2017 meet US EPA Tier 2 and CARB emissions standards for light-duty vehicles (EPA Engine Family K24Z4.5HAX).
The Honda K24Z4 is a 2,354 cc inline‑four naturally aspirated petrol engine engineered for mid-size performance applications (2013-2017). It combines DOHC i-VTEC architecture with PGM-FI electronic fuel injection to deliver a broad, flat torque curve and a high-RPM power peak. Designed to meet contemporary US emissions standards, it balances sporting character with daily-driver practicality.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,354 cc | |
Fuel type | Petrol (Gasoline) | |
Configuration | Inline‑4, DOHC, 16‑valve, i-VTEC | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 87.0 mm × 99.0 mm | |
Power output | 138 kW (187 PS) @ 6,400 rpm | |
Torque | 237 Nm @ 3,900 rpm | |
Fuel system | Honda PGM‑FI (Programmed Fuel Injection) | |
Emissions standard | US EPA Tier 2 / CARB | |
Compression ratio | 11.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven DOHC | |
Oil type | API SN 5W‑30 | |
Dry weight | 140 kg |
The Honda K24Z4 was used across Honda's FB platform with transverse mounting and was not licensed to other manufacturers. This engine received minor platform-specific adaptations-different intake manifolds and engine mounts between trim levels-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
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The K24Z4's primary long-term concern is oil consumption, with elevated incidence in high-RPM driven vehicles. Honda service data indicates this is a design characteristic rather than a defect, while owner reports frequently cite VTC actuator rattle. Aggressive driving and aftermarket exhausts without proper tuning can strain the ECU, making preventative maintenance critical.
Analysis derived from Honda technical bulletins (2013-2017) and aggregated owner workshop data (2014-2023). 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
Yes, the K24Z4 is generally very reliable with proper maintenance. Its chain-driven timing system and robust internals are proven for high mileage. The key to longevity is regular oil level checks and changes to manage the known oil consumption characteristic, and addressing VTC actuator rattle if it occurs.
The most frequent issues are oil consumption (a design characteristic), VTC actuator rattle on cold start, failing main relays, and carbon buildup in the throttle body. These are well-documented in Honda service bulletins and are generally manageable with proper maintenance.
The K24Z4 was exclusively fitted to the ninth-generation (FB) Honda Accord for the North American market between 2013 and 2017. It was used in the EX-L and Touring trim levels. It was not offered in other global markets like Europe or Japan, nor was it used in any other Honda models.
Absolutely. The K24Z4 responds exceptionally well to modifications. Common upgrades include performance cams, intake and exhaust systems, and ECU tuning, which can yield significant power gains. Its strong bottom end and high compression ratio make it a favorite for naturally aspirated builds, though it can also handle moderate forced induction.
Fuel economy is reasonable for a 2.4L engine of its era. Expect around 9.5-10.5 L/100km (30-27 mpg UK) in combined city/highway driving. Careful highway cruising can return figures closer to 7.5 L/100km (38 mpg UK). Economy suffers noticeably with aggressive driving.
Yes. The Honda K24Z4 is an interference engine. This means that if the timing chain jumps or breaks, the pistons will collide with the valves, causing severe internal engine damage. Fortunately, the chain is very robust and rarely fails if the engine is not over-revved.
Honda originally specified API SN grade 5W-30 synthetic oil. Modern high-quality 5W-30 synthetic oils meeting API SP or ACEA A5/B5 standards are excellent choices and provide better protection for the high-compression, high-RPM engine.
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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