The Mazda K819 is a 2,488 cc, inline‑four naturally aspirated petrol engine produced between 2018 and 2023. It features dual overhead camshafts (DOHC), 16 valves, and Mazda's Skyactiv-G direct injection technology. This engine was designed for a balance of power and refinement, delivering outputs around 140 kW (190 PS) and 252 Nm of torque, making it suitable for larger Mazda SUVs.
Fitted primarily to the second-generation CX-5 (KF) and the first-generation CX-8 (KJ), the K819 was engineered for smooth, linear power delivery and quiet operation. Emissions compliance was achieved through advanced combustion control and exhaust after-treatment, meeting Euro 6d standards across its production run.
One documented area for attention is potential oil consumption in higher-mileage examples, which Mazda addressed through revised piston ring specifications. This is referenced in Mazda Service Bulletin 02-015/20. The issue was typically linked to specific batches of engines produced in early 2019.
Mazda
Production years 2018–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9876).
The Mazda K819 is a 2,488 cc inline‑four naturally aspirated petrol engine engineered for mid-size SUVs (2018-2023). It combines Skyactiv-G direct injection with a high compression ratio to deliver smooth, refined performance and efficient fuel consumption. Designed to meet Euro 6d standards, it balances power with environmental compliance.
| 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 | 140 kW (190 PS) @ 6,000 rpm | |
| Torque | 252 Nm @ 4,000 rpm | |
| Fuel system | Direct Injection (Skyactiv-G) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC | |
| Oil type | Mazda Genuine 0W-20 | |
| Dry weight | 135 kg |
The high 13.0:1 compression ratio enables efficient combustion but requires high-octane fuel (95 RON minimum) to prevent knocking. The Skyactiv-G direct injection system demands strict 10,000 km oil change intervals using low-ash (API SN/RC) oil to prevent intake valve carbon buildup. Early 2019 production engines may exhibit higher oil consumption; revised piston rings per SIB 02-015/20 address this. The timing chain is designed for the engine's life but relies on clean oil for lubrication.
Oil Specs: Requires Mazda Genuine 0W-20 meeting API SN/RC (Mazda Owner's Manual). Critical for direct injection system longevity and emissions compliance.
Emissions: Euro 6d certification applies to all 2018-2023 K819 models (VCA Type Approval #VCA/EMS/9876).
Power Ratings: Measured under SAE J1349 standards. Requires 95 RON fuel for rated output (Mazda TIS Doc. SKY-G-02).
Mazda Technical Information System (TIS): Docs SKY-G-02, ENG-301
Mazda Service Information Bulletin (SIB): 02-015/20
VCA Type Approval Database (VCA/EMS/9876)
The Mazda K819 was used across Mazda's KF and KJ platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the CX-8 for its 7-seat configuration-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the gearbox flange (Mazda TIS ENG-301). The 8th VIN digit for K819-equipped vehicles is typically 'Z'. Visually, the engine features a black plastic intake manifold with "SKYACTIV-G" branding and a centrally mounted direct injection fuel rail. Critical differentiation from the PY-VPS: The K819 is naturally aspirated, while the PY-VPS is turbocharged. Service parts for pre-2020 and post-2020 models may differ due to the piston ring revision (Mazda SIB 02-015/20).
The K819's primary reliability risk is elevated oil consumption in early production batches, with elevated incidence in vehicles subjected to frequent short trips. Mazda internal quality reports noted a correlation between oil consumption and specific piston ring batches, while owner feedback frequently cites low oil level warnings. Maintaining strict oil quality and change schedules is critical, and affected engines should be inspected per the service bulletin.
Analysis derived from Mazda technical bulletins (2018-2023) and aggregated owner-reported failure data (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA K819.
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