The Mazda P5Y4 is a 1,496 cc, inline‑four naturally aspirated petrol engine produced between 2014 and 2018. It features dual overhead camshafts (DOHC), 16 valves, and incorporates Mazda's SKYACTIV — G technology for improved thermal efficiency. In standard form, it produced 88 kW (120 PS) and 148 Nm of torque, prioritizing fuel economy and smooth, linear power delivery for urban and highway use.
Fitted primarily to the DJ — generation Mazda2 and select CX — 3 variants, the…
Mazda
Production years 2014–2018 meet Euro 5 standards for all markets (VCA UK Type Approval #VCA/MZ/8910).
The Mazda P5Y4 is a 1,496 cc inline‑four naturally aspirated petrol engine engineered for subcompact and crossover models (2014-2018). It combines DOHC 16-valve architecture with direct injection and a high compression ratio to deliver exceptional fuel economy and responsive low-RPM torque. Designed to meet Euro 5 standards, it prioritizes efficiency without sacrificing drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,496 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 74.5 mm × 85.8 mm | |
Power output | 88 kW (120 PS) @ 6,000 rpm | |
Torque | 148 Nm @ 3,500 rpm | |
Fuel system | Direct Injection (DI) | |
Emissions standard | Euro 5 | |
Compression ratio | 13.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | SAE 0W-20 (API SN/ILSAC GF-5) | |
Dry weight | 98 kg |
The Mazda P5Y4 was used across Mazda's DJ platform with transverse mounting. This engine received minor ECU calibration updates during its production run but no significant mechanical revisions, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The P5Y4's primary reliability risk is high-pressure fuel pump (HPFP) noise or failure in early production units, as documented in Mazda TSB 14-007-15. UK DVSA data indicates this issue was most prevalent in vehicles registered in 2014-2015. Using fuel that meets EN 228 standards and adhering to the specified 0W-20 oil change intervals are critical preventative measures.
Analysis derived from Mazda technical bulletins (2014-2018) and UK DVSA failure statistics (2016-2023). 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 P5Y4 is generally a very reliable and efficient engine. Its main concerns are potential HPFP issues in early models (addressed by TSB) and typical GDI carbon buildup. With regular maintenance, using the correct 0W-20 oil, and quality fuel, it offers excellent long-term durability. The timing chain is designed for life.
The most frequently reported issues are HPFP noise/failure (mainly early production), carbon buildup on intake valves (common to all GDI engines), VVT solenoid malfunctions, and worn engine mounts. These are well-documented in Mazda service bulletins and owner reports.
The P5Y4 1.5L Skyactiv-G petrol engine was used in the third-generation Mazda2 (DJ chassis, 2014-2018) and the first-generation Mazda CX-3 (DK chassis, 2015-2018). It was the base petrol engine for these models in many global markets.
Gains are very limited due to its high compression and naturally aspirated design. A remap might yield 5-8 kW, but risks engine knock. Most 'tuning' focuses on throttle response. Significant power increases require forced induction, which is not a common or supported modification for this engine.
Fuel economy is outstanding for its class. Expect around 5.5 L/100km combined for a Mazda2, translating to roughly 51 mpg (UK). Real-world figures are often even better, making it one of the most economical non-hybrid petrol engines available during its production run.
Yes. The P5Y4 is an interference engine. If the timing chain were to fail (an extremely rare event), the pistons would collide with the open valves, causing catastrophic internal engine damage. This highlights the importance of using the correct oil to ensure chain lubrication.
Mazda specifies SAE 0W-20 engine oil meeting API SN or ILSAC GF-5 standards. Using a high-quality full synthetic 0W-20 oil is strongly recommended to protect the VVT system, maintain fuel economy, and ensure the longevity of the timing chain.
Comprehensive technical documentation and regulatory references
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MAZDA 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
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