The Honda R20A3 is a 1,997 cc, inline‑four naturally aspirated petrol engine produced between 2012 and 2017. It features i-VTEC variable valve timing, a single overhead camshaft (SOHC), and a 16‑valve configuration. This engine was designed for balanced performance in Honda's mid-size models, producing 114 kW (155 PS) and 190 Nm of torque, offering smooth, linear power delivery.
Fitted primarily to the ninth-generation Honda Accord (CU) for global markets, the R20A3 prioritized refinement and fuel efficiency. Emissions compliance was achieved through precise PGM-FI fuel injection and i-VTEC optimization, meeting Euro 5 standards across its production run. Its architecture emphasizes low friction and quiet operation for passenger comfort.
One documented concern is potential oil consumption in high-mileage units, linked to wear in the piston ring lands. This issue, addressed in Honda Service Bulletin SB‑13‑019, involved revised piston ring specifications for replacement engines. No recall was issued, but the bulletin provides guidance for diagnosis and repair of excessive consumption.
Honda
Production years 2012–2017 meet Euro 5 standards for all applicable markets (VCA UK Type Approval #VCA/EMS/5680).
The Honda R20A3 is a 1,997 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans and coupes (2012-2017). It combines i-VTEC variable valve timing with PGM-FI fuel injection to deliver smooth, efficient performance. Designed to meet Euro 5 standards, it balances refinement and fuel economy for highway and urban driving.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 81.0 mm × 97.0 mm | |
| Power output | 114 kW (155 PS) @ 6,500 rpm | |
| Torque | 190 Nm @ 4,300 rpm | |
| Fuel system | Honda PGM-FI (Programmed Fuel Injection) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | N/A | |
| Timing system | Chain-driven | |
| Oil type | Honda 0W-20 (API SN/RC) | |
| Dry weight | 118 kg |
The i-VTEC system provides a broad, linear power band ideal for relaxed cruising but requires strict adherence to 10,000 km oil change intervals using Honda-specified 0W-20 to prevent sludge and potential oil consumption. High-mileage engines should be monitored for oil use; if excessive, piston rings should be replaced per Honda SB-13-019. The timing chain is designed for longevity but benefits from clean oil. Fuel injectors should be cleaned every 80,000 km to maintain optimal spray patterns.
Oil Specs: Requires Honda 0W-20 meeting API SN/RC (Honda Owner's Manual). Critical for preventing oil consumption in high-mileage engines.
Emissions: Euro 5 certification applies to all 2012–2017 models (VCA Type Approval #VCA/EMS/5680). No market-specific variations.
Power Ratings: Measured under SAE J1349 standards. Output consistent across model range (Honda TIS Doc. R20A3-A26019).
Honda Technical Information System (TIS): Docs R20A3-A24684, R20A3-A25146, SB-13-019
VCA Type Approval Database (VCA/EMS/5680)
SAE International: J1349 Engine Power Certification Standards
The Honda R20A3 was used across Honda's Mid-Size Sedan platforms with transverse mounting and was not licensed to other manufacturers. This engine received no major platform-specific adaptations or facelift revisions affecting core compatibility. All specifications are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the exhaust manifold (Honda TIS R20A3-A24894). The 8th VIN digit for Accord models is 'R' for this 2.0L engine family. Visually, it is identifiable by its SOHC cam cover and intake manifold design. Critical differentiation from the K24 series: R20A3 uses a single camshaft and is part of the R-series, while K24 typically features DOHC. Service parts like piston rings have specific part numbers for this engine.
The R20A3's primary reliability consideration is potential oil consumption in high-mileage units, with elevated incidence in vehicles exceeding 150,000 km. Honda internal service data indicated a small number of warranty claims for oil top-ups, while owner reports frequently cite this as a manageable concern. Adherence to the service bulletin and regular oil level checks make mitigation straightforward.
Analysis derived from Honda technical bulletins (2012-2017) and aggregated owner workshop data (2013-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA R20A3.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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