The Honda K20Z4 is a 1,997 cc, inline‑four petrol engine produced between 2007 and 2011. It features a dual overhead camshaft (DOHC), 16‑valve valvetrain with i‑VTEC and programmed fuel injection (PGM‑FI). This engine was designed for responsive, high-revving performance in Honda's sport compact models, producing 148 kW (201 PS) and 190 Nm of torque, offering an engaging driving experience.
Fitted primarily to the eighth‑generation Honda Civic (FA/FG chassis) Type R and the second‑generation Honda CR‑Z (ZF chassis) Type S, the K20Z4 was engineered for spirited driving with precise throttle response and strong top-end power. Emissions compliance for its production period was met through its electronic fuel injection and catalytic converter, aligning with Euro 4 standards.
One documented concern involves the secondary oil pump screen, where debris accumulation can lead to oil starvation and bearing failure. This issue, referenced in Honda Service Bulletin 08‑015, is often attributed to the engine's high-RPM operation and insufficient filtration in early designs. Later K‑series engines saw revisions to the oiling system.
Honda
Production years 2007–2011 meet Euro 4 standards as per applicable EU regulations for vehicles of that era (VCA UK Type Approval #VCA/EMS/8911).
The Honda K20Z4 is a 1,997 cc inline‑four petrol engine engineered for high-performance compact hatchbacks and coupes (2007-2011). It combines DOHC 16-valve architecture with i-VTEC to deliver responsive, high-revving performance. Designed to meet Euro 4 emissions standards, it prioritizes driver engagement and track capability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 148 kW (201 PS) @ 7,800 rpm | |
| Torque | 190 Nm @ 6,100 rpm | |
| Fuel system | Programmed Fuel Injection (PGM‑FI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | API SM/SN, SAE 5W-30 | |
| Dry weight | 126 kg |
The 11.0:1 compression ratio and i-VTEC system provide strong high-RPM power but require premium unleaded fuel (98 RON). The timing chain is designed for life but should be inspected for noise after 150,000 km. The secondary oil pump screen is prone to clogging; regular oil changes with high-quality filters are critical. Valve clearance checks are required every 80,000 km to maintain performance and prevent valve train damage.
Oil Specs: Requires API SM/SN specification 5W-30 oil (Honda Owner's Manual, Civic FA Type R 2008). This viscosity is critical for high-RPM protection.
Emissions: Euro 4 certification applies to all 2007-2011 K20Z4 models (VCA Type Approval #VCA/EMS/8911). No market-specific variations for this standard.
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all markets for this model (Honda EPC Doc. H-K20Z4-001).
Honda Workshop Manual (Civic FA, Sections 6, 10, 11)
Honda Owner's Manual (Civic FA Type R, 2008)
VCA Type Approval Database (VCA/EMS/8911)
The Honda K20Z4 was used across Honda's FA and ZF platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU tuning for different body styles-and no significant facelift revisions during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the alternator (Honda Workshop Manual, Section 6). The 8th VIN digit for K20Z4-equipped vehicles is typically 'K'. Visually, it can be identified by its red valve cover with 'Type R' branding and the i-VTEC solenoid on the cylinder head. Critical differentiation from the K20Z3: The K20Z4 has a revised intake manifold and a slightly lower compression ratio (11.0:1 vs 11.5:1). Service parts like spark plugs and ignition coils are generally compatible across all K20Z4 applications.
The K20Z4's primary reliability risk is secondary oil pump screen clogging, leading to oil starvation and potential engine failure. Honda Service Bulletin 08-015 documents this as a critical issue, while enthusiast community data shows it as a frequent cause of catastrophic failure in modified or poorly maintained engines. Adherence to strict oil change intervals and using high-quality filters make preventative maintenance critical.
Analysis derived from Honda technical bulletins (2007-2011) and enthusiast community failure data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA K20Z4.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with HONDA or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
HONDA Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialHONDA documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
