The Mazda HE3 is a 1,998 cc, inline‑four naturally aspirated petrol engine produced between 2012 and 2018. It features dual overhead camshafts (DOHC), 16 valves, and Mazda's Skyactiv-G direct injection technology. This engine was designed for efficiency, delivering outputs around 118 kW (160 PS) and 210 Nm of torque, making it suitable for responsive everyday driving.
Fitted primarily to the DJ-generation Mazda 3 and second-generation CX-5, the HE3 was engineered for a balance of fuel economy and linear power delivery. Its character is defined by smooth, high-revving performance. Emissions compliance was achieved through advanced combustion control and exhaust after-treatment, meeting Euro 5 standards across its production run.
One documented area for attention is the variable valve timing (VVT) actuator, which can develop internal wear or sticking, leading to timing errors. This is referenced in Mazda Service Bulletin 01-009/15. The issue is often linked to oil quality or extended service intervals. Mazda addressed this in later production with revised actuator components.
Mazda
Production years 2012–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Mazda HE3 is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for compact and crossover SUVs (2012-2018). It combines Skyactiv-G direct injection with a high compression ratio to deliver smooth, high-revving performance and efficient fuel consumption. Designed to meet Euro 5 standards, it balances spirited driving with everyday economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 83.5 mm × 91.2 mm | |
| Power output | 118 kW (160 PS) @ 6,000 rpm | |
| Torque | 210 Nm @ 4,000 rpm | |
| Fuel system | Direct Injection (Skyactiv-G) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC with VVT | |
| Oil type | Mazda Genuine 0W-20 or 5W-30 | |
| Dry weight | 122 kg |
The high 13.0:1 compression ratio enables efficient combustion but requires high-octane fuel (95 RON minimum) to prevent knocking. The Skyactiv-G direct injection system demands strict 10,000 km oil change intervals using low-ash (API SN/RC) oil to prevent intake valve carbon buildup. The VVT system is sensitive to oil quality; using incorrect viscosity or extended intervals can lead to actuator failure per Mazda SIB 01-009/15. The timing chain is designed for the engine's life but relies on clean oil for lubrication.
Oil Specs: Requires Mazda Genuine 0W-20 or 5W-30 meeting API SN/RC (Mazda Owner's Manual). Critical for VVT and direct injection system longevity.
Emissions: Euro 5 certification applies to all 2012-2018 HE3 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Requires 95 RON fuel for rated output (Mazda TIS Doc. SKY-G-01).
Mazda Technical Information System (TIS): Docs SKY-G-01, ENG-205
Mazda Service Information Bulletin (SIB): 01-009/15
VCA Type Approval Database (VCA/EMS/5678)
The Mazda HE3 was used across Mazda's DJ and KE platforms with transverse mounting. This engine received platform-specific adaptations-lightweight subframes in the CX-5 and revised engine mounts in the facelifted Mazda 3 (2015)-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the gearbox flange (Mazda TIS ENG-205). The 8th VIN digit for HE3-equipped vehicles is typically 'Y'. Visually, the engine features a black plastic intake manifold with "SKYACTIV-G" branding and a centrally mounted direct injection fuel rail. Critical differentiation from the PE-VPS: The HE3 has a simpler VVT actuator on the intake cam only, while the PE-VPS features dual VVT. Service parts for pre-2015 and post-2015 models may differ due to the VVT actuator revision (Mazda SIB 01-009/15).
The HE3's primary reliability risk is variable valve timing (VVT) actuator failure, with elevated incidence in vehicles subjected to extended oil change intervals. Mazda internal reports noted a correlation between actuator faults and non-compliant oil usage, while owner feedback frequently cites a rattle on cold start. Maintaining strict oil quality and change schedules is critical to prevent costly repairs.
Analysis derived from Mazda technical bulletins (2013-2018) and aggregated owner-reported failure data (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA HE3.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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