The Mazda HEE is a 1,496 cc, inline‑four naturally aspirated petrol engine produced between 2010 and 2016. It features dual overhead camshafts (DOHC), 16 valves, and variable valve timing (S — VT). In standard form it delivered 82 kW (112 PS) at 6,000 rpm and 142 Nm of torque at 3,500 rpm, providing responsive performance for urban and suburban driving.
Fitted to models such as the Mazda2 (DE), Mazda3 (BL), and Mazda CX — 3 (early variants), the HEE was engineered for fuel — effi…
All production years (2010–2016) meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Mazda HEE is a 1,496 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and crossovers (2010–2016). It combines DOHC architecture with S-VT variable valve timing to deliver responsive low-to-mid range torque and smooth operation. Designed to meet Euro 5 emissions standards, it balances urban drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,496 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 74.5 mm × 85.8 mm | |
Power output | 82 kW (112 PS) @ 6,000 rpm | |
Torque | 142 Nm @ 3,500 rpm | |
Fuel system | Multi-point electronic fuel injection (MPFI) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC with S-VT phaser | |
Oil type | Mazda M5 5W‑30 (API SN/ILSAC GF-5) | |
Dry weight | 110 kg |
The Mazda HEE was used across Mazda's DE and BL platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Mazda3 BL and compact accessory layout in the Mazda2 DE—and from 2014 the CX-3 adopted a slightly detuned variant for emissions calibration, creating minor ECU interchange limits. All adaptations are documented in OEM technical bulletins.
The HEE's primary reliability risk is S-VT cam phaser wear, with elevated incidence in short-trip urban use. Mazda internal data from 2014 indicated a notable rate of timing-related DTCs in vehicles with service intervals exceeding 15,000 km, while UK DVSA MOT records show low failure rates for emissions systems. Cold-start cycles without full warm-up increase sludge accumulation, making oil quality and interval adherence critical.
Analysis derived from Mazda technical bulletins (2010–2016) and UK DVSA failure statistics (2015–2023). 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 HEE is generally reliable with proper maintenance. Early models (2010–2012) had S-VT phaser issues, but revised parts from 2013 improved durability. Regular oil changes with Mazda M5 5W-30 and avoiding excessive short trips greatly enhance longevity. Most well-maintained HEE engines exceed 200,000 km without major issues.
The top issues are S-VT cam phaser sticking (causing rough idle), throttle body carbon buildup, exhaust heat shield rattles, and valve cover oil leaks. These are documented in Mazda service bulletins MZ-SB-10-015 and MZ-SB-11-008. None typically cause catastrophic failure if addressed promptly.
The HEE powered the Mazda2 (DE, 2010–2014), Mazda3 (BL, 2010–2013), and early CX-3 (DK, 2015–2016) as the 1.5 Skyactiv-G petrol variant. All are Euro 5-compliant and use multi-point fuel injection, distinguishing them from later direct-injection Skyactiv engines.
Limited tuning potential exists due to its naturally aspirated design and conservative ECU mapping. ECU remaps typically yield only +5–8 kW. Forced induction is not recommended without internal upgrades. Most owners focus on throttle response improvements rather than peak power gains.
Excellent for its class. In a Mazda2 1.5 (2012), expect ~6.2 L/100km (city) and ~4.3 L/100km (highway), or about 55 mpg UK combined. Real-world mixed driving typically returns 50–60 mpg (UK), depending on conditions and driving style.
Yes. The HEE is an interference engine. If the timing chain fails or jumps (extremely rare due to robust chain design), piston-to-valve contact can occur, causing severe internal damage. However, chain failures are uncommon; phaser issues are far more typical.
Mazda specifies 5W-30 synthetic oil meeting Mazda M5 standard (or API SN/ILSAC GF-5). Always use this grade to ensure proper S-VT phaser operation and sludge prevention. Change every 10,000–15,000 km or annually, whichever comes first.
Comprehensive technical documentation and regulatory references
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MAZDA Official Site
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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)
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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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