The Mazda F6JA is a 1,998 cc, inline‑four naturally aspirated petrol engine produced between 2012 and 2018. It features Mazda's Skyactiv-G technology, including direct injection, a high 13.0:1 compression ratio, and dual overhead camshafts (DOHC). This architecture prioritizes thermal efficiency, translating to strong real-world fuel economy without sacrificing responsiveness.
Fitted primarily to the DJ-generation Mazda 6 and BM-generation Mazda 3, the F6JA was engineered for refined, everyday driving with an emphasis on efficiency and low emissions. Compliance with Euro 5 and later Euro 6 standards was achieved through precise combustion control and a sophisticated exhaust aftertreatment system.
One documented area for attention is potential carbon buildup on intake valves, a known characteristic of direct-injection engines without port injection. Mazda Service Information addresses cleaning procedures to maintain optimal airflow and prevent drivability issues.
Mazda
Production years 2012–2015 meet Euro 5 standards; 2016–2018 models meet Euro 6 compliance (VCA UK Type Approval #VCA/EMS/5678).
The Mazda F6JA is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for mid‑size sedans and hatchbacks (2012-2018). It combines Skyactiv-G direct injection with a high compression ratio to deliver responsive performance and class-leading fuel efficiency. Designed to meet Euro 5 and Euro 6 standards, it balances spirited driving with low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 83.5 mm × 91.2 mm | |
| Power output | 118–121 kW (160–165 PS) | |
| Torque | 210–213 Nm @ 4,000 rpm | |
| Fuel system | Direct Injection (Skyactiv-G) | |
| Emissions standard | Euro 5 (2012-2015); Euro 6 (2016-2018) | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Mazda Genuine 0W-20 or 5W-30 (API SN/RC) | |
| Dry weight | Approx. 120 kg |
The high compression ratio provides a linear, responsive power delivery ideal for highway cruising and city driving. Due to its direct injection system, periodic intake valve cleaning (every 60,000–80,000 km) is recommended to prevent carbon buildup, which can cause rough idle or hesitation. Using the specified low-viscosity oil (0W-20) is critical for optimal fuel economy and engine protection. The timing chain is designed for longevity but should be inspected if unusual noise is detected. Fuel quality meeting EN 228 standards is recommended.
Oil Specs: Requires Mazda Genuine 0W-20 or 5W-30 meeting API SN/RC (Mazda Owner's Manual). Lower viscosity aids efficiency.
Emissions: Euro 5 certification applies to 2012-2015 models; Euro 6 applies to 2016-2018 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Output consistent across model years with minor ECU calibrations (Mazda TSM F6).
Mazda Technical Service Manual (TSM): Section F6 Engine
Mazda Electronic Parts Catalogue (EPC): Doc. MZ-F6-2012
VCA Type Approval Database (VCA/EMS/5678)
The Mazda F6JA was used across Mazda's DJ and BM platforms with transverse mounting. This engine received platform-specific ECU calibrations and exhaust tuning. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the exhaust manifold (Mazda TSM F6). The 8th digit of the VIN is 'F' for this 2.0L Skyactiv-G petrol engine. Visually, it can be identified by its compact design, plastic intake manifold, and 'SKYACTIV-G 2.0' badge on the engine cover. Critical differentiation from the larger F8 engine: The F6JA has a smaller displacement (1998cc vs 2488cc) and different engine mount configurations. Service parts are generally consistent across the DJ and BM platforms for this engine code.
The F6JA's primary documented maintenance item is intake valve carbon buildup, common to direct-injection engines. Mazda service data indicates cleaning is typically recommended after 80,000 km for optimal performance, while owner feedback often cites improved idle smoothness post-cleaning. Extended oil change intervals or frequent short trips can accelerate deposit formation, making adherence to service schedules critical.
Analysis derived from Mazda technical bulletins (2012-2018) and owner-reported data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA F6JA.
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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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