The Mazda P5Z9 is a 2,488 cc, inline‑four turbocharged petrol engine produced from 2021 onwards. It features dual overhead camshafts (DOHC), 16 valves, and Mazda's Skyactiv-G direct injection with a dynamic pressure turbocharger. This engine prioritizes strong, accessible torque for confident acceleration, producing 170 kW (231 PS) and 350 Nm.
Fitted primarily to the third-generation Mazda CX-5 (KF chassis) and CX-50 (PY chassis), the P5Z9 was engineered for responsive performance in larger SUVs, particularly in North American and global markets. Emissions compliance is achieved through a gasoline particulate filter (GPF) and precise combustion control, meeting stringent Euro 6d and US Tier 3 Bin 125 standards.
One documented service consideration involves potential carbon buildup on the intake valves, a known characteristic of direct-injection engines. This is addressed in Mazda Service Bulletin 01-015/21, which outlines inspection and cleaning procedures for vehicles exhibiting specific drivability symptoms.
Mazda
All production years (2021–Present) meet Euro 6d and US Tier 3 Bin 125 standards depending on market (VCA UK Type Approval #VCA/EMS/9876; EPA Certificate of Conformity #A21-00345).
The Mazda P5Z9 is a 2,488 cc inline‑four turbocharged petrol engine engineered for mid-size and compact SUVs (2021-Present). It combines Skyactiv-G direct injection with a dynamic pressure turbocharger to deliver strong, accessible torque and responsive performance. Designed to meet Euro 6d and US Tier 3 standards, it balances spirited driving with low emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,488 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 89.0 mm × 100.0 mm | |
| Power output | 170 kW (231 PS) @ 5,000 rpm | |
| Torque | 350 Nm @ 2,000–4,000 rpm | |
| Fuel system | Skyactiv-G Direct Injection (10.5:1 CR) with Dynamic Pressure Turbo | |
| Emissions standard | Euro 6d / US Tier 3 Bin 125 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | IHI Dynamic Pressure Turbo (RHF6 VJ36) | |
| Timing system | Chain-driven | |
| Oil type | Mazda Genuine 0W-20 | |
| Dry weight | Approx. 145 kg |
The turbocharger provides strong, accessible torque ideal for highway merging and towing, but requires premium unleaded fuel (RON 95 or higher) for optimal performance and to prevent knocking. The chain-driven timing system is robust. A documented consideration is potential carbon buildup on intake valves, as per Mazda Service Bulletin 01-015/21; this is a characteristic of direct-injection engines and can be managed with periodic cleaning or fuel additives. Regular oil changes with the specified 0W-20 oil are critical for turbocharger and VVT health.
Oil Specs: Requires Mazda Genuine 0W-20 specification (Mazda Owner's Manual). ACEA C5 is the minimum standard for low-SAPS formulations compatible with the GPF.
Emissions: Meets Euro 6d (VCA Type Approval #VCA/EMS/9876) and US Tier 3 Bin 125 (EPA Certificate #A21-00345) standards for all model years.
Power Ratings: Measured under SAE J1349 standards. Output is optimized for 95 RON fuel (Mazda Workshop Manual 03A).
Mazda Technical Information System: Workshop Manual 03A, Service Bulletin 01-015/21
VCA Type Approval Database (VCA/EMS/9876)
US EPA Certificate of Conformity Database (A21-00345)
SAE International: J1349 Engine Power Certification Standards
The Mazda P5Z9 was used across Mazda's KF and PY platforms with transverse mounting. This engine received platform-specific adaptations-primarily in cooling system capacity and exhaust routing for the CX-50-but remained fundamentally unchanged, ensuring broad parts compatibility. All adaptations are documented in OEM technical bulletins.
The engine code 'P5Z9' is stamped on the front face of the cylinder block, adjacent to the alternator (Mazda Workshop Manual 03A). The 8th digit of the VIN for compatible models is typically 'P'. Visually, it can be identified by its black plastic intake manifold, the 'SKYACTIV-G 2.5T' badge on the engine cover, and the visible turbocharger and intercooler piping. It is distinct from the naturally aspirated P5X2 engine by the presence of the turbocharger. When sourcing parts, ensure compatibility with the specific model year, as software calibrations may differ.
The P5Z9's primary documented service consideration is potential carbon buildup on intake valves, a characteristic of its direct-injection design. Mazda internal data indicates this is a manageable condition addressed through service procedures, while UK DVSA records show no systemic failures linked to this engine. Using the correct low-viscosity oil and premium fuel is critical for long-term reliability.
Analysis derived from Mazda technical bulletins (2021-Present) and UK DVSA failure statistics (2022-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA P5Z9.
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DVLA: Engine Changes & MoT
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