2003–2007 Honda Accord 3.0L V6 JDM J30A Replacement Engine

Get your Accord back on the road with a JDM Honda J30A 3.0L V6 replacement engine for compatible 2003–2007 Honda Accord V6 applications.

Imported from Japan, this used J30A offers a practical alternative to rebuilding a high-mileage or damaged original engine. J-Spec Auto Sports inspects and compression tests the engine before sale to help verify its internal condition.

Engine Details

• Engine Code: J30A
• Displacement: 3.0L
• Configuration: V6
• Valvetrain: SOHC VTEC
• Fuel Type: Gasoline
• Aspiration: Naturally Aspirated
• Application: 2003–2007 Honda Accord V6
• Condition: Used JDM
• Testing: Compression tested
• Installation Type: Long-block replacement
• Origin: Japan

2003–2007 Honda Accord V6 Application

This JDM J30A can serve as a replacement long block for compatible seventh-generation Honda Accord V6 models.

Applications include:

• 2003 Honda Accord 3.0L V6
• 2004 Honda Accord 3.0L V6
• 2005 Honda Accord 3.0L V6
• 2006 Honda Accord 3.0L V6
• 2007 Honda Accord 3.0L V6

Honda used different versions of the 3.0L J-Series engine during this generation. Therefore, treat this JDM engine as a replacement long block rather than assuming every attached component will interchange directly.

Long-Block Installation

Keep your original Accord engine until the replacement is completely installed and tested.

Your technician should compare both engines and transfer the required USDM components from the original engine.

Depending on the application, these components may include:

• Intake manifold
• Exhaust manifolds
• Engine wiring harness
• Sensors
• Throttle components
• Alternator
• A/C compressor
• Power-steering components
• Engine mounts and brackets
• Flexplate or flywheel
• Emissions-related equipment
• Other USDM-specific accessories

Using the correct original components helps maintain compatibility with your Accord’s wiring, ECU and emissions systems.

Compression Tested Before Sale

J-Spec Auto Sports compression tests this engine before offering it for sale.

We also identify the engine by its stamped serial number and visually inspect accessible components. Contact us if you would like additional testing information or photographs before ordering.

What Is Included?

You will receive the JDM Honda J30A engine assembly shown in the product photos.

Unless specifically guaranteed in writing, accessories remaining attached to a used imported engine should be considered convenience items. Plan to reuse the appropriate components from your original engine.

Recommended Pre-Installation Service

Take advantage of the engine being outside the vehicle and inspect or replace accessible maintenance items before installation.

We recommend checking:

• Engine oil and filter
• Spark plugs
• Valve cover gaskets
• Front and rear crankshaft seals
• Camshaft seals
• Timing belt and related components
• Water pump
• Thermostat
• Drive belts
• Accessible coolant hoses and seals

Prime the lubrication system before the first startup. After installation, fill the engine with the correct fluids and properly bleed the cooling system.

Shipping & Installation

J-Spec Auto Sports ships engines by freight throughout the continental United States.

Professional installation is also available at our Richmond, Virginia facility. Contact us for current installation pricing and scheduling.

Frequently Asked Questions

Will this engine fit a 2003–2007 Honda Accord V6?
This JDM J30A is intended as a long-block replacement for compatible 2003–2007 Accord V6 applications. Verify your vehicle and original engine before ordering.

Is this a J30A4 or J30A5?
This is a Japanese-market J30A. Do not assume the attached components are identical to a U.S.-market J30A4 or J30A5. Use the engine as a long block and transfer the required original USDM components.

Is this a complete plug-and-play engine?
No. Plan to transfer the necessary accessories, sensors and external components from your original engine.

Has the engine been tested?
Yes. J-Spec Auto Sports compression tests the engine before sale.

Should I keep my old engine?
Yes. Do not discard your original engine until the JDM replacement has been completely installed, started and verified.

Do you ship nationwide?
Yes. Freight shipping is available throughout the continental United States.

Does J-Spec offer installation?