2006-2012 Mazda CX-7 2.3L Inline-4 DOHC Turbo MZR Engine JDM L3-VDT

About this unit

Engine Specifications

• Engine Code: L3-VDT (MZR DISI Turbo)

• Displacement: 2.3 Liters (2,261 cc)

• Configuration: Inline 4-Cylinder

• Valvetrain: DOHC 16-Valve (Chain-Driven Timing with VVT)

• Fuel System: DISI (Direct Injection Spark Ignition)

• Forced Induction: Factory Turbocharged

• Horsepower Output: Approx. 244 hp @ 5,000 RPM (USDM CX-7 spec calibration)

• Torque Output: Approx. 258 lb-ft @ 2,500 RPM

Vehicle Fitment & Drivetrain Compatibility

This long block is configured as a direct mechanical replacement for North American crossover platforms:

• Mazda CX-7 (Grand Touring, Sport, Touring turbo models): 2006, 2007, 2008, 2009, 2010, 2011, 2012

• MazdaSpeed3 & MazdaSpeed6 Interchange Note: While this engine shares its foundational 2.3L L3-VDT block architecture with the high-performance MazdaSpeed3 and MazdaSpeed6 platforms, the internal compression mapping, oil pan shape, accessory mounts, and factory turbo wastegate clocks differ significantly. The CX-7 variant uses a slightly detuned internal profile to optimize lower-end torque for a crossover chassis. This unit is dressed and sold primarily as a direct drop-in replacement for the Mazda CX-7.

Long Block Installation Notes

PROFESSIONAL INSTALLATION WARNING: Direct-injected turbocharged engines operate under extreme fuel rail pressures and tight mechanical clearances. To protect your investment and maintain parts warranty protections, ensure your installer follows these steps:

1. Transfer USDM External Accessories & Turbo Hardware: This assembly is sold strictly as a Long Block (assembled engine block, cylinder head, oil pan, and internal moving components). You MUST swap over your vehicle’s original intake manifold, exhaust manifold, turbocharger assembly, intercooler piping, alternator, power steering pump, and A/C compressor.

2. Reuse Your Original Wiring & Sensors: JDM engine wiring harnesses are cut short during vehicle dismantling in Japan and are configured for right-hand drive architectures. Discard the JDM sub-harness and route your original USDM engine wiring loom. Additionally, transfer all of your original vehicle sensors (Crankshaft Position, Camshaft Position, and Water Temperature sensors) to guarantee error-free plug-and-play communication with your factory ECU.

3. Address the Timing Chain & VVT Actuator: The Mazda 2.3L DISI engine is well-known for factory timing chain stretch and variable valve timing (VVT) actuator wear over time. While the replacement JDM engine is resting accessible on the shop floor, we strongly recommend inspecting and replacing the timing chain components and VVT gear with a brand-new factory kit to ensure long-term bulletproof reliability.

4. Change Out External Gaskets & Seals: Replace the front crankshaft seal, rear main seal, and install fresh valve cover gaskets before sliding the engine block against your factory transmission.

5. Fluid & Maintenance Protocols: Refill the engine exclusively with high-quality 5W-30 full synthetic motor oil alongside a new premium oil filter. Because this engine utilize direct injection, always use top-tier fuel and inspect your high-pressure fuel pump (HPFP) lines for an absolute seal during assembly. Flush the radiator completely to remove any residual scale or debris before firing.

What is included

You receive exactly what is pictured. Engines are supplied as a long block assembly with the components visible in the photos. Accessories such as the alternator, starter, intake manifold or sensors are included only where you can see them on the unit, so check the photographs before ordering and ask us if anything is unclear.

Before you order

• Confirm the engine code against your own vehicle, not just the model year.
• Japanese market units can differ from the US version in intake, loom and sensors.
• Replace the timing components, water pump and seals while the unit is out. It is cheap insurance on an engine this age.
• Keep your original accessories until the swap is finished and running.