The Mazda L823 is a 2,260 cc, inline‑four petrol engine produced between 2001 and 2008. It features an aluminium block and head, DOHC, and sequential multi‑point fuel injection. This engine, part of the MZR family, delivers a balance of performance and refinement for its class, producing 118 kW (160 PS) and 211 Nm of torque in its most common configuration.
Fitted to models like the Mazda6 (GG/GY), Mazda3 (BK), and MX-5 (NC), the L823 was engineered for responsive everyday driving with an emphasis on smooth power delivery and mid-range flexibility. Emissions compliance for its era was managed through its electronic fuel injection and catalytic converter system, meeting Euro 3 and Euro 4 standards depending on the model year and market.
One documented service consideration involves the variable intake manifold system, which can develop vacuum leaks or actuator faults over time. Mazda service documentation, such as Technical Service Bulletin 01-002/05, notes potential for carbon buildup on the intake valves, which can affect idle quality and fuel economy if not addressed during major services.
Mazda
Production years 2001–2005 meet Euro 3 standards; 2006–2008 models meet Euro 4 standards depending on market (Mazda Service Manual, Group 3L; VCA Type Approval #VCA/MZ/5678).
The Mazda L823 is a 2,260 cc inline-four petrol engine engineered for mid-size sedans and sports cars (2001-2008). It combines DOHC with a variable-length intake manifold to deliver responsive power and good mid-range torque. Designed to meet Euro 3 and Euro 4 emissions standards, it offers a practical blend of performance and efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,260 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 87.5 mm × 94.0 mm | |
| Power output | 118 kW (160 PS) | |
| Torque | 211 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi-point fuel injection (SFI) | |
| Emissions standard | Euro 3 (2001-2005); Euro 4 (2006-2008) | |
| Compression ratio | 9.7:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | SAE 5W-30 (API SL/SM or equivalent) | |
| Dry weight | 135 kg |
The variable intake manifold provides a broad torque curve for responsive driving but requires periodic inspection for vacuum leaks and carbon buildup on the intake valves. Using the specified 5W-30 oil is critical for protecting the timing chain and valve train. The timing chain is generally robust but should be inspected for wear or noise during major services. The engine responds well to regular oil changes and air filter replacements to maintain optimal performance and fuel economy.
Oil Specs: Requires SAE 5W-30 with API SL/SM rating or equivalent specification (Mazda Workshop Manual, Mazda6).
Emissions: Euro 3 certification applies to 2001-2005 models; Euro 4 applies to 2006-2008 models (VCA Type Approval #VCA/MZ/5678).
Power Ratings: Measured under SAE J1349 standards. Output figures are for naturally aspirated variants (Mazda PT-2005).
Mazda Workshop Manual, Mazda6 (Model Year 2002)
Mazda PT-2005 Specifications Document
Mazda Technical Service Bulletin 01-002/05 (Intake System)
VCA Type Approval Database (VCA/MZ/5678)
The Mazda L823 was used across Mazda's Mazda6 and Mazda3 platforms with transverse mounting. This engine received minor ECU and accessory drive adaptations for different model years and markets, creating potential interchange limits for ancillary components. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the timing cover (Mazda Workshop Manual, Mazda6). The 8th digit of the VIN typically corresponds to the engine type for this era. The L823 is visually identified by its inline-four configuration, aluminium block, and "L8" casting marks on the block. Critical differentiation from the smaller L3 engine: The L823 has a larger displacement (2.3L vs 2.0L) and different bore/stroke dimensions. When sourcing parts, verify the specific model year and market, as accessory brackets and ECU calibrations can vary.
The L823's primary reliability risk is age-related wear in the variable intake manifold system, with elevated incidence in high-mileage or poorly maintained examples. Mazda service documentation highlights vacuum leaks and carbon buildup as common causes for drivability complaints. Extended service intervals and use of incorrect oil can accelerate wear on internal engine components, making adherence to the factory maintenance schedule critical.
Analysis derived from Mazda technical bulletins (2001-2008) and workshop manual procedures. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA L823.
Comprehensive technical documentation and regulatory references
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MAZDA Official Site
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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
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VCA Certification Portal
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