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Japanese Domestic Market (JDM) Engines

Directly imported Japanese Domestic Market engines. Each unit is compression tested, logged, and shipped on a dedicated engine pallet with insured European road freight.

99 listings · page 1 of 5

How to buy a JDM engine

JDM stands for Japanese Domestic Market: engines built for cars sold in Japan, removed there and imported used. Their appeal is access to versions that were never sold new in the US. Honda's first Civic Type R, the EK9, was offered to the Japanese market only, so its engine reaches US buyers this way. Because every JDM engine is a used engine, the buying process is about identification and condition rather than catalog specifications.

Identify the exact engine and version

Start with the engine code stamped on the block, then the version within that code. Japanese-market and US-market versions of the same engine can be rated and equipped differently. Toyota quoted 280 PS for the twin-turbo 3.0-liter in the Japanese-market Supra RZ, while the US Supra Turbo was rated at 320 hp. Toyota added VVT-i to the US non-turbo Supra for 1998. Compare the listing's code and version to what your chassis, mounts and gearbox were built for.

Know what the listing includes

Listings in this department range from a bare engine to a package with transmission, wiring harness (loom) and engine computer. A harness and computer from the Japanese-market car can save time, but they were built for that car, so plan on adapting them to your chassis. Confirm turbochargers, intake, alternator and other accessories on the listing rather than assuming they are present.

Check condition, not stated mileage

Treat mileage on an imported engine as unverified unless documents come with it. Judge the engine on evidence: compression readings (taken before shipping where the design allows), the condition of the oil and coolant passages, and for turbo engines, the state of the turbochargers. Plan on timing-component service, a water pump, seals and gaskets for an engine of unknown history before you run it hard.

Match the gearbox and drivetrain

If the engine comes with its transmission, confirm that the gearbox is the one paired with that engine in the donor car, whether it includes a limited-slip differential, as some Honda packages here do, and what your axles, mounts and shifter linkage will need. A front-drive engine and gearbox will not drop into a rear-drive chassis without major changes, so settle the layout of your project first.

Emissions and registration

An engine swap into a road vehicle is regulated. EPA policy treats a light-duty engine switch as tampering unless the result matches a certified configuration of the same or newer model year as the chassis or there is a reasonable basis for knowing emissions are not adversely affected, and EPA notes it is generally not possible to put one maker's engine in another maker's chassis and match a certified configuration. In California every engine change must pass an initial inspection at a Smog Check Referee Center. Check your state's rules before you buy, especially for a cross-brand swap.

Shop by make

Browse Toyota JDM engines or Honda JDM engines. For a gearbox to suit a swap, see transmissions, or ask about a specific listing through contact.

Ordering jdm engines

How are these units inspected before shipping?
Every unit is inspected and documented before it is palletized. Engines and motors receive a compression check where the design allows, and the recorded condition notes ship with the unit.
What does freight cost and how long does delivery take?
Insured European road freight starts at £92.92 for standard units and £155.56 above £2,088.00, priced by delivery zone across the UK and Continental Europe. Handling is 1–2 business days. Transit is typically 1 to 6 business days (1–3 business days UK, 3–6 business days Continental Europe). Depending on your exact location and carrier route it can take up to 10 business days. See our freight shipping policy.
Can I return a unit if it is not right?
Yes, within 30 days of delivery under our refund and return policy. Remorse returns carry a 15% restocking fee and return freight; defective or damaged units are covered by us.
Is a JDM engine the same as the US version of that engine?
Not always. Japanese-market and US-market versions can differ in rating and hardware. Toyota, for example, quoted 280 PS for the Japanese-market Supra RZ twin-turbo, while the US Supra Turbo was rated at 320 hp. Compare engine codes and part numbers rather than assuming the two are interchangeable with your harness, computer and emissions equipment.
Can I verify the mileage on a JDM engine?
Usually not from the engine alone, so treat any mileage figure as unverified unless documents come with it. Judge the engine by compression readings, the condition of the oil and coolant, turbocharger shaft play on turbo engines, and how complete it is. Budget for timing-component service, a water pump and seals before hard use.
Is a JDM engine swap legal in California?
It can be, but it must meet state rules. California requires every vehicle with an engine change to pass an initial inspection at a Smog Check Referee Center, and federal policy only allows a switch that matches a certified configuration of the same or newer model year as the chassis. Cross-brand swaps rarely meet that standard.
Does a JDM engine come with an ECU and wiring harness?
Only when the listing says so. Some packages in this department include the engine computer, wiring harness and transmission, while others are the engine alone. A Japanese-market harness and computer were built for the original car, so expect some adaptation for your chassis, and check that sensors and connectors are present.