The Honda K24Z2 is a 2,354 cc, inline‑four petrol engine produced between 2010 and 2015. It features a dual overhead camshaft (DOHC) with 16 valves and Honda's i — VTEC (intelligent Variable Valve Timing and Lift Electronic Control) system. This technology enables continuously variable intake cam timing and a switch to a high — lift cam profile, delivering a peak output of 138 kW (187 PS) and 232 Nm of torque.
Fitted primarily to the eighth — generation Honda Accord (CU) for th…
Honda
Production years 2010–2015 meet applicable US EPA Tier 2 Bin 5 emissions standards for passenger vehicles of that era (Honda Internal Emissions Certification Docs).
The Honda K24Z2 is a 2,354 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans (2010-2015). It combines DOHC 16-valve architecture with i-VTEC variable valve timing to deliver a broad, torque-rich powerband and efficient cruising. Designed to meet mid-2010s US emissions standards, it balances everyday drivability with mechanical refinement.
| 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 | 138 kW (187 PS) @ 6,800 rpm | |
Torque | 232 Nm @ 4,400 rpm | |
Fuel system | PGM-FI (Programmed Fuel Injection) | |
Emissions standard | US EPA Tier 2 Bin 5 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | 5W-20 (API SM/SN) | |
Dry weight | 132 kg |
The Honda K24Z2 was used across Honda's CU platform with transverse mounting. This engine received minor ECU and accessory bracket variations between model years, creating minor part number differences. All adaptations are documented in OEM technical bulletins.
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The K24Z2 is renowned for its durability and refinement, with the primary long-term concern being wear in the i-VTEC oil pressure switch or solenoid, particularly if oil changes are neglected. Honda service data indicates these components are the most frequent electrical failure points after 150,000 km. Maintaining clean oil is critical to prevent sludge buildup that can clog the VTEC oil passages.
Analysis derived from Honda technical bulletins (2010-2015) and aggregated workshop repair data. 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 K24Z2 is exceptionally reliable when maintained properly. Its robust internals mean it can easily surpass 300,000 km. The main long-term concerns are the i-VTEC solenoid and VTC actuator. Regular oil changes with the correct low-viscosity oil are paramount for longevity.
The most frequent issues are i-VTEC system failures (solenoid/switch), individual ignition coil failures, valve cover gasket leaks, and VTC actuator rattle on cold start. These are well-documented in Honda service bulletins and are generally inexpensive to fix.
The K24Z2 engine was used almost exclusively in the eighth-generation Honda Accord (CU chassis) for the North American market from 2010 to 2015. It was typically found in the EX, EX-L, and Touring trim levels.
Aftermarket ECU tuning is common on the K24Z2 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Fuel economy is very good for its size. Expect around 9.5-10.5 L/100km in mixed driving (approximately 27-30 mpg UK). Highway cruising can see figures closer to 7.0 L/100km (40 mpg UK), depending on driving style and vehicle condition.
Yes. The Honda K24Z2 is an interference engine. This means if the timing chain breaks, the pistons will contact the valves, causing catastrophic engine damage. Fortunately, the chain is very robust and rarely fails with proper maintenance.
Honda recommends 5W-20 engine oil meeting API SM or SN specifications. Using a high-quality full synthetic oil is highly recommended, especially for protecting the VTEC system and VTC actuator. Change intervals should be every 10,000 km or 6 months.
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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