The Honda K24A3 is a 2,354 cc, inline‑four naturally aspirated petrol engine produced between 2002 and 2005. It features a dual overhead camshaft (DOHC) valvetrain and Honda's i — VTEC system, engineered for refined torque and reliability in premium compact applications. Peak output is 160 PS (118 kW) at 6,000 rpm and 220 Nm of torque at 3,600 rpm, delivering smooth, linear power ideal for touring.
Fitted primarily to the North American and European — market Honda Accord (C…
Honda
Production years 2002–2005 meet Euro 3 standards .
The Honda K24A3 is a 2,354 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans and coupes (2002-2005). It combines DOHC architecture with Honda's i-VTEC system to deliver smooth, torque-rich performance. Designed to meet Euro 3 standards, it prioritizes refinement and drivability while maintaining emissions compliance for its era.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,354 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 87.0 mm × 99.0 mm | |
Power output | 118 kW (160 PS) @ 6,000 rpm | |
Torque | 220 Nm @ 3,600 rpm | |
Fuel system | PGM-FI (Programmed Fuel Injection) | |
Emissions standard | Euro 3 | |
Compression ratio | 9.7:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 150 kg |
The Honda K24A3 was used across Honda's CL/CM platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the TSX-and featured a unique intake manifold for the Accord trim. All adaptations are documented in OEM technical bulletins.
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The K24A3's primary reliability risk is VTEC oil pressure switch failure, with elevated incidence in vehicles with neglected oil changes. Honda SIB 03-047 identifies the switch as a common failure point, while timing chain tensioner wear remains a secondary risk for high-mileage engines. Extended oil intervals and use of incorrect viscosity make VTEC component longevity and timing chain integrity critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 K24A3 is generally very reliable if maintained correctly. Its main concern is the VTEC oil pressure switch, with timing chain tensioner wear becoming a factor in high-mileage examples. With regular oil changes using the correct specification, these engines can easily surpass 200,000 km. Neglecting maintenance is the primary cause of major failures.
The most common issues are VTEC oil pressure switch failure (causing P1259 code), timing chain tensioner wear causing rattling noises, VTC actuator failure leading to rough idle, and excessive oil consumption due to piston ring wear in some high-mileage engines.
The K24A3 was used in the seventh-generation Honda Accord (chassis codes CL9, CM2) for North American and European markets from 2002 to 2005, as well as the first-generation Acura TSX (chassis code CL9) from 2004 to 2005.
Yes, the K24A3 can be tuned. Basic modifications like an induction kit and exhaust can yield small gains. More significant power increases come from ECU remapping and performance cams. Its robust DOHC design can handle moderate power increases, but supporting modifications are recommended for reliability.
Fuel economy is respectable for a 2.4L engine. Expect around 9.5 L/100km (30 mpg UK) in mixed driving for a manual transmission model. Careful highway driving can see figures closer to 7.5 L/100km (38 mpg UK), while aggressive city driving will be higher.
Yes. The K24A3 is an interference engine. This means if the timing chain jumps teeth, the pistons will collide with the open valves, causing severe and expensive internal engine damage. While the chain is robust, tensioner failure can lead to this scenario.
Honda recommends 5W-30 or 10W-40 engine oil meeting their specifications. Using a high-quality synthetic or semi-synthetic oil is highly recommended, especially for the VTEC and VTC systems. Oil should be changed every 10,000 km or 6 months to ensure all systems operate reliably.
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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