The Honda L15Z4 is a 1,498 cc, inline‑three naturally aspirated petrol engine produced between 2015 and 2020. It features a dual overhead camshaft (DOHC) design with i-VTEC variable valve timing and lift, delivering 88 kW (120 PS) and 145 Nm of torque. This engine prioritizes fuel efficiency and smooth low-to-mid-range power delivery for urban and suburban commuting.
Fitted primarily to the fourth-generation Honda Jazz (GE) and the second-generation Honda HR-V (RV), the L15Z4 was engineered for responsive, economical daily driving. Emissions compliance was achieved through precise fuel metering and a close-coupled catalytic converter, meeting Euro 6 standards across its production run.
One documented concern is potential issues with the VTEC oil pressure switch, which can trigger false 'Check Engine' lights, noted in Honda Service Bulletin A16-045. This is often linked to electrical connector corrosion or switch failure. Honda addressed this with updated switch part numbers and revised diagnostic procedures.
Honda
All production years 2015–2020 meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/5679).
The Honda L15Z4 is a 1,498 cc inline‑three naturally aspirated petrol engine engineered for compact hatchbacks and crossovers (2015-2020). It combines i-VTEC variable valve timing with port fuel injection to deliver smooth, economical performance. Designed to meet Euro 6 standards, it balances urban efficiency with reliable operation.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,498 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 73.0 mm × 89.4 mm | |
| Power output | 88 kW (120 PS) @ 6,600 rpm | |
| Torque | 145 Nm @ 4,600 rpm | |
| Fuel system | Port fuel injection (PFI) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 13.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Honda 0W-20 (or 5W-30) | |
| Dry weight | 98 kg |
The i-VTEC system optimizes valve timing for efficiency but requires regular oil changes with Honda 0W-20 to ensure proper hydraulic actuation. The high 13.5:1 compression ratio demands RON 95+ fuel to prevent knocking and maintain performance. The timing chain is generally maintenance-free but should be inspected if a rattle is heard. The engine’s compact size and light weight contribute to the vehicle’s agility and fuel economy.
Oil Specs: Requires Honda 0W-20 specification for optimal i-VTEC operation (Honda Owner's Manual GE4). 5W-30 is an acceptable alternative in some climates.
Emissions: Euro 6 certification applies to all 2015–2020 models (VCA Type Approval #VCA/EMS/5679). No market-specific variations.
Power Ratings: Measured under SAE J1349 standards. Peak output requires RON 95+ fuel (Honda TIS Doc. L15Z4-003).
Honda Technical Information System (TIS): Docs L15Z4-001, L15Z4-002, L15Z4-003
VCA Type Approval Database (VCA/EMS/5679)
SAE International: J1349 Engine Power Certification Standards
The Honda L15Z4 was used across Honda's GE and RV platforms with transverse mounting. This engine received platform-specific adaptations-revised engine mounts and intake manifolds for the HR-V-creating minor interchange limits with other L15 variants. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the alternator (Honda TIS L15Z4-004). The 8th VIN digit for GE4 Jazz is 'G'; for RV2 HR-V it is 'R'. Visually, the L15Z4 has a black plastic valve cover. Critical differentiation from the L15B series: The L15Z4 is naturally aspirated and uses port injection, while L15B engines are turbocharged with direct injection. ECU and sensor configurations are not interchangeable.
The L15Z4's primary reliability risk is related to the VTEC oil pressure switch, with incidence highest in humid climates. Honda internal service data indicates this is typically an electrical fault rather than an oil pressure problem, and most cases are resolved with a switch replacement. Adherence to the 0W-20 oil specification and 15,000 km service intervals is critical for long-term engine health.
Analysis derived from Honda technical bulletins (2015-2020) and UK DVSA failure statistics (2016-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA L15Z4.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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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
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VCA Certification Portal
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