The Mazda P5X2 is a 2,488 cc, inline‑four naturally aspirated petrol engine produced between 2019 and 2024. It features dual overhead camshafts (DOHC), 16 valves, and Mazda's Skyactiv-G direct injection technology with a high 13.0:1 compression ratio. This engine prioritizes smooth, linear power delivery for its class, producing outputs of 138 kW (187 PS) and 252 Nm of torque.
Fitted primarily to the third-generation Mazda CX-5 (KF chassis) and Mazda6 (GJFL chassis), the P5X2 was engineered for refined highway cruising and responsive urban driving. Emissions compliance was achieved through precise combustion control and a dual-stage exhaust after-treatment system, meeting Euro 6d-TEMP and later Euro 6d standards.
One documented service consideration involves potential oil dilution under specific, sustained low-temperature operating conditions, as noted in Mazda Service Bulletin 01-012/20. This is linked to the engine's aggressive thermal management strategy and is mitigated by allowing the engine to reach full operating temperature during regular use.
Mazda
Production years 2019–2021 meet Euro 6d-TEMP standards; 2022–2024 models meet Euro 6d standards depending on market (VCA UK Type Approval #VCA/EMS/8765).
The Mazda P5X2 is a 2,488 cc inline‑four naturally aspirated petrol engine engineered for mid-size SUVs and sedans (2019-2024). It combines Skyactiv-G direct injection with a high geometric compression ratio to deliver smooth, linear power and class-competitive fuel efficiency. Designed to meet stringent Euro 6d-TEMP and Euro 6d standards, it balances responsive performance with low emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,488 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 89.0 mm × 100.0 mm | |
| Power output | 138 kW (187 PS) @ 6,000 rpm | |
| Torque | 252 Nm @ 4,000 rpm | |
| Fuel system | Skyactiv-G Direct Injection (13.0:1 CR) | |
| Emissions standard | Euro 6d-TEMP (2019-2021); Euro 6d (2022-2024) | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Mazda Genuine 0W-20 | |
| Dry weight | Approx. 135 kg |
The high compression ratio provides strong, linear power 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 oil dilution under sustained, very short trips in cold climates, as per Mazda Service Bulletin 01-012/20; this is mitigated by allowing the engine to reach full operating temperature regularly. Regular oil changes with the specified 0W-20 oil are critical.
Oil Specs: Requires Mazda Genuine 0W-20 specification (Mazda Owner's Manual). ACEA C2/C5 is the minimum standard for low-SAPS formulations.
Emissions: Euro 6d-TEMP certification applies to 2019-2021 models (VCA Type Approval #VCA/EMS/8765). Euro 6d certification applies to 2022-2024 models.
Power Ratings: Measured under SAE J1349 standards. Output is optimized for 95 RON fuel (Mazda Workshop Manual 02A).
Mazda Technical Information System: Workshop Manual 02A, Service Bulletin 01-012/20
VCA Type Approval Database (VCA/EMS/8765)
SAE International: J1349 Engine Power Certification Standards
The Mazda P5X2 was used across Mazda's KF and GJFL platforms with transverse mounting. This engine received platform-specific adaptations-primarily in exhaust routing and engine mount stiffness for the CX-5-but remained fundamentally unchanged throughout its production, ensuring broad parts compatibility. All adaptations are documented in OEM technical bulletins.
The engine code 'P5X2' is stamped on the front face of the cylinder block, adjacent to the alternator (Mazda Workshop Manual 02A). The 8th digit of the VIN for compatible models is typically 'P'. Visually, it can be identified by its black plastic intake manifold and the 'SKYACTIV-G 2.5' badge on the engine cover. It is distinct from the turbocharged PY-VPTS engine by the absence of a turbocharger and associated plumbing. When sourcing parts, ensure compatibility with the specific model year, as emissions equipment (e.g., GPF) was updated for Euro 6d compliance.
The P5X2's primary documented service consideration is potential oil dilution under specific, sustained low-temperature operating conditions. Mazda internal data indicates this is a rare occurrence managed by the vehicle's ECU, while UK DVSA records show no systemic failures linked to this engine. Using the correct low-viscosity oil and allowing the engine to reach full operating temperature are critical for long-term reliability.
Analysis derived from Mazda technical bulletins (2019-2024) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA P5X2.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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