The Mazda L3M6 is a 2,260 cc, inline‑four naturally aspirated petrol engine produced between 2003 and 2009. It features dual overhead camshafts (DOHC), 16 valves, and Mazda's MZR variable valve timing (VVT) system. In standard form it delivered 118 kW (160 PS), with torque figures around 205 Nm, providing a balance of mid-range responsiveness and smooth high-RPM power.
Fitted to models such as the BK-generation Mazda 3 and the first-generation CX-7 (non-turbo variants), the L3M6 was engineered for drivers seeking refined performance and everyday drivability. Emissions compliance was met through precise fuel metering and catalytic converter efficiency, allowing it to meet Euro 4 standards across its production run.
One documented area for attention is premature failure of the variable valve timing (VVT) solenoid, which can trigger check engine lights and affect performance. This issue, referenced in Mazda Service Bulletin 03-007/08, is often linked to oil contamination or sludge buildup restricting solenoid operation. Mazda addressed this with revised solenoid components in later production.
Mazda
Production years 2003–2009 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/2345).
The Mazda L3M6 is a 2,260 cc inline‑four naturally aspirated petrol engine engineered for compact and crossover SUVs (2003-2009). It combines MZR VVT technology with a cast-iron block for durability to deliver smooth, linear power and reliable performance. Designed to meet Euro 4 standards, it balances spirited driving with everyday practicality.
| 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) @ 6,000 rpm | |
| Torque | 205 Nm @ 4,000 rpm | |
| Fuel system | Sequential Multi-Point Injection (SFI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 9.7:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC with VVT | |
| Oil type | Mazda Genuine 5W-30 | |
| Dry weight | 130 kg |
The MZR VVT system provides a broad torque curve ideal for daily driving but requires strict 10,000 km oil change intervals using 5W-30 oil to prevent solenoid clogging and sludge buildup. The timing chain is designed for longevity but relies on clean oil for lubrication. The 9.7:1 compression ratio allows use of regular 95 RON fuel without penalty. The VVT solenoid is susceptible to failure if oil changes are neglected; revised components per SIB 03-007/08 improve reliability. Catalytic converter efficiency is critical for maintaining Euro 4 compliance.
Oil Specs: Requires Mazda Genuine 5W-30 meeting API SL/SM specifications (Mazda Owner's Manual). Critical for VVT solenoid function and timing chain life.
Emissions: Euro 4 certification applies to all 2003-2009 L3M6 models (VCA Type Approval #VCA/EMS/2345).
Power Ratings: Measured under SAE J1349 standards. Rated output achieved with 95 RON fuel (Mazda TIS Doc. MZR-01).
Mazda Technical Information System (TIS): Docs MZR-01, ENG-102
Mazda Service Information Bulletin (SIB): 03-007/08
VCA Type Approval Database (VCA/EMS/2345)
The Mazda L3M6 was used across Mazda's BK and ER platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the CX-7 for its heavier chassis-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-102). The 8th VIN digit for L3M6-equipped vehicles is typically 'L'. Visually, the engine features a silver aluminum valve cover with "MZR" branding and a centrally mounted intake manifold. Critical differentiation from the L3-VDT: The L3M6 is naturally aspirated and lacks the turbocharger, intercooler, and associated plumbing. Service parts for the VVT solenoid were revised in 2007; pre-2007 units require the updated part per SIB 03-007/08.
The L3M6's primary reliability risk is variable valve timing (VVT) solenoid failure, with elevated incidence in vehicles subjected to extended oil change intervals. Mazda internal reports noted a correlation between solenoid faults and oil sludge, while owner feedback frequently cites check engine lights with P0011/P0021 codes. Maintaining strict oil quality and change schedules is critical to prevent costly diagnostics and repairs.
Analysis derived from Mazda technical bulletins (2003-2009) and aggregated owner-reported failure data (2008-2018). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA L3M6.
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