The Honda C30A3 is a 2,977 cc, 60° V6 naturally aspirated petrol engine produced between 1997 and 2001. It features a dual overhead camshaft (DOHC) with 24 valves and Honda's VTEC variable valve timing system. This design prioritized high — revving performance and broad power delivery, producing 206 kW (280 PS) and 294 Nm of torque.
Fitted exclusively to the first — generation Honda NSX (NA1 chassis), the C30A3 was engineered for supercar — level responsiveness, precision…
Honda
Production years 1997–2001 meet applicable Japanese 1998 Emissions Standards and US EPA Tier 1 regulations for its model year (Honda Emissions Certification Docs).
The Honda C30A3 is a 2,977 cc 60° V6 naturally aspirated petrol engine engineered for the flagship NSX supercar (1997-2001). It combines VTEC variable valve timing with a 24-valve DOHC layout to deliver exhilarating, high-RPM power and razor-sharp throttle response. Designed to meet late-1990s emissions standards, it balances exotic performance with Honda's hallmark reliability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,977 cc | |
Fuel type | Petrol | |
Configuration | 60° V6, DOHC, 24-valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 90.0 mm × 78.0 mm | |
Power output | 206 kW (280 PS) @ 7,300 rpm | |
Torque | 294 Nm @ 6,500 rpm | |
Fuel system | Honda PGM-FI (Programmed Fuel Injection) | |
Emissions standard | Japanese 1998 Standards / US EPA Tier 1 | |
Compression ratio | 10.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 192 kg |
The Honda C30A3 was used exclusively in Honda's NA1 platform with mid-engine, transverse mounting. This engine received no platform-specific adaptations across its production run, ensuring parts uniformity. All service procedures and specifications are documented in a single, dedicated OEM technical manual.
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The C30A3's primary documented reliability concern is clutch release bearing wear in manual transmission models, with elevated incidence in high-performance or track-driven examples. Honda service data indicated a notable number of replacements were required after 80,000 km in aggressively driven vehicles, while owner reports frequently cite clutch pedal issues as a precursor. Heat soak from the mid-engine layout is a contributing factor.
Analysis derived from Honda technical bulletins (1997-2001) and aggregated owner repair data (2000-2010). 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 C30A3 is renowned for its exceptional reliability and durability, often described as 'bulletproof' when properly maintained. Its main weakness is the clutch release bearing in manual cars under hard use. With strict adherence to the 90,000 km timing belt schedule and regular oil changes, it can easily surpass 300,000 km. It's a testament to Honda's engineering excellence.
The most frequent issues are clutch release bearing wear (manuals), timing belt failure if not replaced on schedule, VTEC solenoid/oil pressure switch failures preventing VTEC engagement, and broken exhaust manifold studs. These are well-documented in Honda service literature and are generally straightforward to fix with OEM parts.
The C30A3 was used exclusively in the first-generation Honda NSX (NA1 chassis) from 1997 to 2001. It was fitted to both the coupe and Targa top variants, serving as the sole engine option for this model during its production run, replacing the earlier C30A.
Aftermarket ECU tuning is common on the C30A3 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.
As a high-performance V6, fuel economy is not its strong suit. In an NSX, expect around 14.0-16.0 L/100km (17-20 mpg US / 20-24 mpg UK) in combined driving. Gentle highway cruising can yield figures around 11.0 L/100km (25 mpg US / 30 mpg UK). Actual figures are heavily dependent on driving style.
Yes. The Honda C30A3 is an interference engine. If the timing belt fails, the pistons will contact the open valves, causing severe internal engine damage. This makes adhering to the 90,000 km replacement interval absolutely critical to prevent catastrophic failure.
Honda originally specified API SJ or SL grade oil, typically in 5W-30 viscosity. Modern high-quality 5W-30 or 0W-30 full synthetic oils meeting API SP or higher standards are excellent choices and provide superior protection for the DOHC VTEC valvetrain, especially under high-RPM conditions.
Comprehensive technical documentation and regulatory references
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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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