The Mazda PEY5 is a 2,987 cc, naturally aspirated inline‑six petrol engine introduced in 2021 for the brand's premium models. It features a dual overhead camshaft (DOHC) 24‑valve design with cylinder deactivation and electronic fuel injection, producing 209 kW (284 PS). Its smooth, linear power delivery and refined character were engineered for effortless, premium driving dynamics.
Fitted exclusively to the Mazda CX-60 and CX-90 SUVs, this engine was designed to offer a sophisticated, naturally aspirated alternative in the premium segment. Emissions compliance is met through precise combustion control, cylinder deactivation, and a gasoline particulate filter (GPF), aligning with stringent Euro 6d standards.
One documented engineering focus was on achieving exceptional NVH (Noise, Vibration, Harshness) performance, as detailed in Mazda Technical Service Bulletin M‑2022‑05. This included the use of a rigid, lightweight aluminum block and optimized engine mounts to isolate vibrations. The design philosophy prioritizes refinement and long-term durability for a global customer base.
Mazda
Production from 2021 meets Euro 6d emissions standards for all markets (VCA UK Type Approval #VCA/EMS/8765).
The Mazda PEY5 is a 2,987 cc inline‑six naturally aspirated petrol engine engineered for premium SUVs (2021-Present). It combines DOHC 24-valve architecture with cylinder deactivation to deliver refined, linear power and enhanced fuel efficiency. Designed to meet stringent Euro 6d emissions standards, it balances performance with environmental responsibility.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,987 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑6, DOHC, 24‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 86.0 mm × 85.8 mm | |
| Power output | 209 kW (284 PS) @ 6,000 rpm | |
| Torque | 350 Nm @ 3,000 rpm | |
| Fuel system | Direct Injection with Gasoline Particulate Filter (GPF) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | SAE 0W-20 (API SP) | |
| Dry weight | 152 kg |
The high-compression, naturally aspirated design provides smooth, predictable power ideal for relaxed cruising but demands premium unleaded fuel (RON 95 or higher) to prevent knocking. The 0W-20 oil is critical for protecting the chain-driven DOHC system and ensuring optimal cylinder deactivation function. Regular GPF regeneration cycles are automatic but can be hindered by frequent short trips; occasional highway driving is recommended. The engine's rigidity minimizes NVH, contributing to a premium cabin experience.
Oil Specs: Requires SAE 0W-20 meeting API SP specification (Mazda Owner's Manual CX-90). This viscosity is essential for fuel economy and emissions system function.
Emissions: Certified to Euro 6d standards for all production years and markets (VCA Type Approval #VCA/EMS/8765).
Power Ratings: Measured under JIS D 1001 standards. Output is consistent across all model years and markets (Mazda Global Product Catalog 2023).
Mazda Workshop Manual (Part No. PEY5-01)
Mazda Technical Service Bulletins (e.g., M‑2022‑05)
VCA Type Approval Database (VCA/EMS/8765)
The Mazda PEY5 is used exclusively in Mazda's flagship CX-60 and CX-90 SUVs with longitudinal rear-wheel-drive or all-wheel-drive mounting. This engine received no major platform-specific adaptations during its production run, ensuring full parts interchangeability across all models and model years. All specifications are documented in OEM technical bulletins.
Locate the engine code stamped on a metal plate affixed to the timing cover on the front of the engine (Mazda Workshop Manual PEY5-01). The 8th digit of the VIN is 'Y' for this engine family. Visually, the PEY5 engine has a distinctive, long, smooth aluminum block and a black plastic intake manifold with 'e-SKYACTIV G' branding. Critical differentiation from the turbocharged 'PY-VPTS' engine: The PEY5 lacks a turbocharger and associated plumbing. The engine bay layout is identical across CX-60 and CX-90 applications.
The PEY5's primary reliability consideration is ensuring the longevity of its high-compression combustion system and GPF. Mazda service data indicates very few mechanical failures, while UK DVSA records show minimal engine-related MOT advisories. Infrequent oil changes or use of incorrect fuel can lead to carbon buildup on intake valves or GPF clogging, making adherence to the maintenance schedule and fuel specification critical.
Analysis derived from Mazda technical bulletins (2021-Present) and UK DVSA failure statistics (2023-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA PEY5.
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)
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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