The Mazda 8AN1 is a 1,998 cc, inline‑four naturally aspirated petrol engine produced between 2012 and 2018. It features dual overhead camshafts (DOHC), 16 valves, and Mazda's Skyactiv — G direct injection technology. This architecture delivers a balance of efficiency and linear power, with outputs typically around 118–121 kW (160–165 PS) and 210 Nm of torque.
Fitted primarily to the DJ — generation Mazda 6 and BM — generation Mazda 3, the 8AN1 was engineered for refined da…
Mazda
Production years 2012–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Mazda 8AN1 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 13.0:1 compression ratio to deliver responsive power and improved fuel efficiency. Designed to meet Euro 5 standards, it balances performance with reduced emissions.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol | |
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 Nm @ 4,000 rpm | |
Fuel system | Direct Injection (Skyactiv-G) | |
Emissions standard | Euro 5 | |
Compression ratio | 13.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | Mazda Genuine 0W-20 or 5W-30 | |
Dry weight | Approx. 125 kg |
The Mazda 8AN1 was used across Mazda's DJ/BM platforms with transverse mounting. This engine received minor ECU calibrations for different model weights but no major mechanical revisions affecting core compatibility during its production run. All adaptations are documented in OEM technical bulletins.
The 8AN1's primary documented service consideration is intake valve carbon buildup, with elevated incidence in vehicles subjected to frequent short trips or low-quality fuel. Mazda service data indicates this is a maintenance item rather than a design flaw, while owner reports suggest it can affect idle smoothness and fuel economy if neglected. Adherence to fuel quality recommendations and periodic inspections make this a manageable concern.
Analysis derived from Mazda technical bulletins (2012-2018) and aggregated UK MOT failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
Yes, the 8AN1 is generally considered a reliable engine. Its main long-term consideration is potential carbon buildup on intake valves, which is manageable with quality fuel and periodic cleaning. With regular oil changes using the correct specification, the timing chain and other components are robust. Many examples exceed 200,000 km without major issues.
The most frequently documented issues are intake valve carbon buildup affecting idle and performance, and occasional noise from the VVT actuator on cold starts. Less common are failures of the high-pressure fuel pump. Minor oil consumption can occur in some high-mileage engines, which Mazda often deems acceptable within limits.
The 8AN1 2.0L Skyactiv-G petrol engine was used in the second-generation (DJ) Mazda 6 from 2012 to 2018 and the third-generation (BM) Mazda 3 from 2013 to 2016. It was the base petrol engine for these models in many markets, including Europe and the UK.
Yes, the 8AN1 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 147-150 kW (200 PS) and torque to 240-250 Nm. The engine's high compression ratio and robust internals handle these gains well. Further modifications like an intake or exhaust can yield additional results, but significant power increases require internal work.
Official combined figures for the Mazda 6 2.0L are around 5.8 L/100km (49 mpg UK). Real-world consumption typically ranges from 6.5-8.0 L/100km (35-43 mpg UK) depending on driving style and conditions. The Mazda 3, being lighter, often achieves slightly better economy, commonly returning 40-48 mpg UK on mixed driving.
Yes. The Mazda 8AN1 is an interference engine. This means if the timing chain were to fail or jump timing, the pistons could collide with the open valves, causing catastrophic internal engine damage. Fortunately, the timing chain is very durable with proper maintenance.
Mazda recommends using their Genuine 0W-20 oil for optimal fuel economy and performance, or 5W-30 for general use, especially in older vehicles or hotter climates. The oil must meet API SN/ILSAC GF-5 specifications or higher. Using the correct low-viscosity oil is crucial for the VVT system and overall engine protection.
Comprehensive technical documentation and regulatory references
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MAZDA Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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
Type-approval guidance and documentation.
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