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) platforms, the P5Y8 was engineered for refined, engaging driving with an emphasis on fuel economy and low emissions. Compliance with Euro 6d-TEMP and later standards is achieved through a sophisticated engine management system, cooled exhaust gas recirculation (EGR), and a gasoline particulate filter (GPF).
One documented service consideration is potential carbon buildup on intake valves, mitigated by the dual-injection system but still noted in Mazda Service Information Bulletin SI-001-20. This characteristic is inherent to direct injection designs. Minor ECU calibration updates were implemented for enhanced emissions control in model year 2021.
Mazda
Production years 2019–2020 meet Euro 6d-TEMP standards; 2021–Present models meet Euro 6d standards depending on market (VCA UK Type Approval #VCA/EMS/5678).
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 | API SP, SAE 0W-20 | |
| Dry weight | Not specified in available OEM docs |
The high compression ratio and dual-injection system provide smooth, efficient power but require strict adherence to 0W-20 API SP specification oil to protect internals and maintain GPF function. While the dual-injection design significantly reduces intake valve carbon buildup compared to pure direct injection, periodic inspection is still advised. The timing chain is designed for the engine's lifespan but should be checked for noise during major services. Fuel quality meeting EN 228 standards is recommended for optimal performance and emissions.
Oil Specs: Requires API SP / ILSAC GF-6 0W-20 oil (Mazda Owner's Manual BP Series). This viscosity is critical for fuel economy and emissions system protection.
Emissions: Euro 6d-TEMP certification applies to initial 2019-2020 models; 2021+ models typically meet Euro 6d (VCA Type Approval Records).
Power Ratings: Measured under JIS or DIN standards depending on market (Mazda Group PT-2023). Output varies slightly by specific model and market tuning.
Mazda Workshop Manual (BP Series CX-30/Mazda3)
Mazda Owner's Manual (BP Series)
Mazda Group Powertrain Specifications (PT-2023)
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.
Locate the engine code stamped on a flat pad on the front of the engine block, near the gearbox flange (Mazda Workshop Manual BP Series). The code will read "P5Y8". Visually, it can be identified by its "SKYACTIV-G 2.0" branding on the plastic engine cover and the presence of a gasoline particulate filter (GPF) in the exhaust system. The dual-injection fuel rail is not externally visible. Parts compatibility is generally high across the BP platform, but confirm specific part numbers using the VIN, as ECU software versions vary by model year for emissions compliance.
The P5Y8's primary reliability consideration is maintaining the gasoline particulate filter (GPF) and using correct oil specifications. Mazda's internal data indicates robust mechanical reliability, while UK DVSA MOT data shows emissions system faults as a common area for attention. Adherence to specified oil grades and driving patterns that allow for passive GPF regeneration are critical for long-term trouble-free operation.
Analysis derived from Mazda technical bulletins (2019-Present) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA P5Y8.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with MAZDA or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialMAZDA documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
