The Mazda P5Y8 is a 1,998 cc, inline‑four naturally aspirated petrol engine produced from 2019 to present. It features Skyactiv — G technology with a 13.0:1 compression ratio, dual injection (direct and port), and a 4 — 2 — 1 exhaust manifold, delivering 132–135 kW (178–182 PS) for responsive, linear acceleration. The high compression ratio enables efficient combustion for strong low — rpm torque and everyday drivability.
Fitted to the Mazda3 (BP) and CX — 30 (BP) platform…
Mazda
Production years 2019–2020 meet Euro 6d-TEMP standards; 2021–Present models meet Euro 6d standards depending on market .
The Mazda P5Y8 is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for premium compact SUVs and hatchbacks (2019-Present). It combines Skyactiv-G technology with dual injection (direct and port) to deliver responsive, linear power and high efficiency. Designed to meet stringent Euro 6d-TEMP and Euro 6d emissions standards, it balances spirited performance with low running costs.
| 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 | 132–135 kW (178–182 PS) | |
Torque | 200–205 Nm @ 4,000 rpm | |
Fuel system | Dual Injection (Direct + Port) | |
Emissions standard | Euro 6d-TEMP / Euro 6d | |
Compression ratio | 13.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven camshafts | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | Not specified in available OEM docs |
The Mazda P5Y8 was used across Mazda's BP platform with transverse mounting. This engine received minor ECU calibration updates for emissions compliance in different model years, creating potential software incompatibilities. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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
Yes, the P5Y8 engine is generally considered very reliable mechanically. Its Skyactiv-G design prioritizes durability. The main long-term considerations are proactive maintenance of the GPF system and strict adherence to the specified 0W-20 oil to prevent issues. With proper care, it should provide excellent service life.
The most frequently documented issues relate to the emissions system: GPF clogging from short trips, intake manifold runner control faults, and occasional high-pressure fuel pump noise or failure. Valve cover gasket leaks are also a common wear item. These are covered in Mazda's service information.
The P5Y8 2.0L Skyactiv-G engine is used in the current generation Mazda3 (BP chassis, 2019-Present) and CX-30 (BP chassis, 2019-Present) in various trim levels globally. It is the standard petrol engine for these models in many markets.
Modest gains are possible through ECU remapping, typically unlocking 10-20 kW extra by optimizing ignition and fuel maps. Significant power increases are limited by the naturally aspirated design and high compression ratio. Any tuning should be performed by a reputable specialist and may impact emissions compliance and warranty.
Fuel economy is very good for its performance. Expect approximately 6.0-6.5 L/100km (43-47 mpg UK) combined in a manual transmission Mazda3, and slightly higher figures for automatics or the heavier CX-30. Real-world economy is highly dependent on driving style and trip length, especially concerning GPF regeneration.
Yes. The Mazda P5Y8 is an interference engine. If the timing chain were to fail or jump significantly, the pistons would contact the valves, causing severe internal engine damage. Fortunately, the timing chain is designed to last the engine's lifetime under normal conditions.
Mazda mandates API SP (or ILSAC GF-6) specification 0W-20 viscosity oil. Using the correct low-viscosity oil is crucial for fuel economy, emissions system (particularly GPF) protection, and overall engine longevity. Do not substitute with thicker oils.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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