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 P5Y4 was engineered for responsive low-end torque and exceptional fuel efficiency. Emissions compliance was achieved through a high 13.0:1 compression ratio, a 4-2-1 exhaust manifold to reduce residual gas, and precise direct injection, meeting Euro 5 standards across its production run.
One documented concern is occasional high-pressure fuel pump (HPFP) noise or failure, particularly in early production units, as noted in Mazda Technical Service Bulletin TSB‑14‑007‑15. This issue was often linked to specific fuel quality or filter clogging and was addressed by Mazda through revised pump calibration and updated service procedures.
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 high 13.0:1 compression ratio enables excellent fuel economy but requires precise ignition timing and high-octane fuel (RON 95 minimum) for optimal performance and to prevent knocking. The direct injection system necessitates periodic induction cleaning (every 80,000 km) to prevent carbon buildup on intake valves, as per Mazda TSB 14-007-15. Using SAE 0W-20 oil is critical for maintaining the efficiency of the variable valve timing system. Early production units may exhibit HPFP noise; a revised pump is available under warranty or service bulletin.
Oil Specs: Requires SAE 0W-20 meeting API SN/ILSAC GF-5 (Mazda Owner's Manual DJ). ACEA C2 is also acceptable.
Emissions: Euro 5 certification applies to all 2014–2018 P5Y4 engines (VCA Type Approval #VCA/MZ/8910). No market-specific variations.
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all applications (Mazda TIS Doc. SKY-HP-02).
Mazda Technical Information System (TIS): Docs SKY-15-01, SKY-HP-02, TSB 14-007-15
VCA Type Approval Database (VCA/MZ/8910)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front of the cylinder block, near the accessory drive belt (Mazda TIS Doc. ENG-ID-04). The 8th digit of the VIN is 'P' for P5-series engines. Visually, the P5Y4 can be identified by its compact size, silver intake manifold, and "SKYACTIV-G 1.5" badge on the engine cover. It is distinct from the larger P5-VPS (1.5T) by the absence of a turbocharger and associated plumbing. When sourcing parts, ensure compatibility with the specific model year, as ECU software versions may differ.
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.
Find answers to most commonly asked questions about MAZDA P5Y4.
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UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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