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 market, the K24Z4 was engineered to offer accessible performance with everyday refinement. Emissions compliance for its era was achieved through precise fuel metering and ignition control, meeting US EPA Tier 2 and California Air Resources Board (CARB) standards applicable to 2013–2017 model years.
One documented service consideration is the potential for oil consumption due to piston ring design, which can lead to low oil levels if not monitored, as noted in Honda Service Bulletin 14‑028. This is typically caused by ring flutter under high-RPM conditions. The engine was succeeded by the more powerful K24W in 2018.
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 DOHC i-VTEC system provides a broad torque curve and high-RPM power but requires strict adherence to 10,000 km oil change intervals to prevent excessive consumption and ensure engine longevity. Using the specified API SN 5W-30 oil is critical for protecting the high-compression internals. The chain-driven timing system is robust and maintenance-free for the life of the engine. The PGM-FI system demands a healthy battery for optimal sensor operation. Oil consumption is a known characteristic and levels should be checked monthly, per Honda SIB 14-028.
Oil Specs: Requires API SN 5W-30 specification (Honda Owner's Manual). ACEA A5/B5 is an acceptable modern equivalent.
Emissions: Meets US EPA Tier 2 and CARB standards for 2013-2017 model years (EPA Engine Family K24Z4.5HAX).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all model variants (Honda Workshop Manual).
Honda Technical Information System (TIS): Workshop Manual (2013), SIB 14-028
US Environmental Protection Agency (EPA) Engine Certification Database
Honda EPC (Electronic Parts Catalogue) Doc. H-K24Z4-13
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front of the engine block, just below the cylinder head and behind the alternator (Honda Workshop Manual). The 8th VIN digit for K24Z4-equipped FB Accords is typically 'K'. Visually, it features a black or silver valve cover with "i-VTEC" embossed on top. Critical differentiation from the K24Z7: The K24Z4 has a unique intake manifold casting and camshaft profiles tuned for the Accord. The engine harness connector for PGM-FI is unique to this engine family.
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.
Find answers to most commonly asked questions about HONDA K24Z4.
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