JDM OF CALIFORNIA INC – WARRANTY POLICY

Engine & Transmission Warranty

Our warranty covers only the head and block internals of engines and transmissions. All electronic parts are sold “as-is” with no warranty.

Standard Replacement Engines & Transmissions

  • Coverage: 90-day warranty covering head and block only.
  • Warranty Start Date: Begins on the purchase date / From day of pick up or delivery.

Out-of-State Purchasers or Shipping by Freight.

  • The warranty period will begin on the date of delivery to account for shipping time.

Performance Swaps

  • Coverage: 30-day warranty on head and block for engines and transmissions with VTEC, turbo, or supercharged systems.

Rotary Engines

  • All rotary engines and transmissions are sold “as-is” with no warranty coverage.

Catalytic Converter Requirement : Warranty is void if the catalytic converter is non-functional or missing.

  • All Engines & transmissions must be installed within the warranty coverage period.

  • Warranty coverage applies only to the head and block of the engine and transmission and excludes any labor costs associated with removal, installation, diagnostics, or other services. Labor is not covered under warranty.

  • Non-Transferable Warranty: The warranty provided by JDM of California is non-transferable and applies only to the original purchaser of the product.
  • Electronic Units (ECUs): No warranty.

Required Maintenance

To maintain warranty coverage, the following maintenance procedures must be completed before using the engine:

For Engines:

  1. Replace the engine oil and oil filter, and inspect all gaskets.
  2. Install a new timing belt or chain, thermostat, and water pump.
  3. Flush the cooling system and refill it with antifreeze.
  4. Install new spark plugs, belts, and hoses.

For Transmissions:

  1. Inspect and replace the flex plate if needed.
  2. Replace the oil pan gasket, seals, and filter.
  3. Flush and inspect cooling lines, properly align the torque converter (for automatic transmissions), and add transmission fluid according to the manufacturer’s specifications.
  4. Reset the control module and adjust the neutral safety switch.

DISCLAIMER:

JDM of California is not liable for improper installation or use of any engine/transmission. The following circumstances and parts are not covered by our warranty:

  • Professional Installation Required
    • Engines and transmissions must be installed by a certified mechanic. If a certified mechanic does not perform the installation, the warranty is void.
    • We do not provide technical support for installations. We strongly recommend consulting a qualified professional mechanic if you are unfamiliar with the installation process.
  • Non-Covered Parts
    • The warranty does not cover external engine parts, including (but not limited to) axles, power steering, oil/water pumps, intake and exhaust manifolds, carburetors, distributors, coil packs, ignitors, valve covers, alternators, starters, emission devices, thermostats, belts, hoses, clutches, flywheels, pulleys, wiring, ECUs, turbo/supercharger units, fuel systems, injectors, oil pumps, gaskets, seals, sensors, solenoids, or plastic trims. 
  • Please use the original accessories from the original engine.
  • Required System Overhauls
    • Oil System: An oil system overhaul, including a system flush and oil pump replacement, is required. Engine damage from insufficient oil or oil pressure will void the warranty.
    • Timing Overhaul: Timing belt/chain/tensioner replacement is required.
    • Cooling System: A complete cooling system overhaul is required. Damage caused by engine overheating is not covered.
  • Prohibited Modifications
    • Any modifications or forced induction (Nitrous/Alcohol Injection/Turbo/Supercharger/Aftermarket ECU upgrades) not designed for the engine will void the warranty.
    • Swapping or removal of head(s), crank, rods, pistons, cams, or gears, or opening the transmission casing will void the warranty. 
  • Any labor for installation or removal of any defective part of an engine/transmission is not covered under warranty.
  • No Returns or Exchanges
    • Performance engines are non-returnable and non-exchangeable.
  • Improper Maintenance or Installation: Damage resulting from incorrect installation, insufficient oil, overheating, or failure to adhere to recommended maintenance procedures.
  • Customer must perform cooling system overhaul. Loss caused by overheating of the engine unless overheating is the direct result of the failure of an internal part of the engine.
  • Any tune-ups and adjustments in belts, hoses, filters, emission control devices, spark plugs, etc. are not covered under warranty.
  • Decrease in performance of any covered part due to normal wear and tear unless actual breakdown occurs. JDM OF CALIFORNIA will not be held responsible if the engine purchased does not fit into the designated vehicle. Before purchasing the engine/transmission, the customer must verify that the engine will fit into said vehicle. We will not be held responsible if an incorrect engine is purchased.
  • On most of the JDM engines we recommend using all original accessories from original vehicle such as intake and exhaust manifold, brackets, harness, ECU, injectors etc. (Use long block only). 
  • CANCEL ORDER or RETURN: UP TO 35% CANCELLATION FEES. 

  • Fitment: It is the customer’s responsibility to verify that the engine/transmission will fit the designated vehicle. We do not accept responsibility for incorrect fitment.

GENERAL INFORMATION:

Low-Mileage Used Engines, Transmissions, and Parts from Japan

At JDM California, we specialize in bringing you low mileage used engines, transmissions, and parts, imported directly from Japan. Carefully selected for their exceptional condition and reliability, these components are sourced from vehicles with minimal wear, ensuring optimal performance and extended lifespan.

Whether you’re upgrading, repairing, or restoring, our inventory offers cost-effective, dependable solutions that keep your vehicle running smoothly. With a reputation for quality and a commitment to excellence, JDM California is your trusted destination for authentic Japanese automotive parts.

JDM of California provides its customers with used imported Japanese engines with low mileage. External parts of the engines such as belts, hoses, seals, gaskets, and plastic covers are sometimes damaged during shipping and can be replaced by the customer’s mechanic using parts from the designated vehicle. Cosmetic damage such as scratches on valve cover is normal on used engines and does not reflect upon performance of said engine. In addition, replaceable parts such as sensors, exhaust pipes, and air intake boxes may be missing if they are broken or damaged. JDM OF CALIFORNIA is not responsible for these parts as the warranty only covers internal parts, which would prevent the engine/transmission from operating incorrectly.

ALL OUR PERFORMANCE ENGINES ARE SOLD FOR OFF ROAD HIGHWAYS OF CALIFORNIA.

SMOG & EMISSIONS:

JDM of California is not responsible for meeting emissions or smog compliance. Please check with local authorities regarding emissions regulations.

Defective Engine Claim Procedure

In the unlikely event that an engine, head, block, or transmission is found to be defective, please follow the steps below to submit a claim. All required information should be sent via email to JDM of California.

  • Detailed Work Order: Provide a comprehensive written description (work order) from a Certified Mechanic, detailing the defect. Include clear photographs of the affected part.

  • Certification and Contact Information: Attach a copy of the Certified Mechanic’s certification and contact information. JDM of California will verify the legitimacy of these documents with the Certified Mechanic.

    • Note: The Certified Mechanic must be independent of the original purchaser of the engine from JDM of California.

  • Once the documentation is received, JDM of California will assess the claim and determine whether a refund for the defective part(s) or a replacement engine/transmission will be provided. Please note the following:

    • Warranty Limitations: Shipping costs, labor, and any new parts purchased by the customer, such as a timing belt, water pump, or gaskets, are not covered under warranty.
    • Return Requirements: If a replacement is authorized, the defective engine/transmission must be returned complete and without missing parts. Any missing components will be removed from the replacement before shipment.
    • Return Shipping: The cost of return shipping is the responsibility of the customer.

SALES & SHIPPING POLICY:

  • Refused/Returned Orders: A 35% restocking fee, based on the total invoiced amount, will be applied to all refused or returned orders. Additionally, the customer will be responsible for both original and return shipping charges. No exceptions.
  • Shipping Liability: JDM of California is not responsible for any damage that occurs during the shipment of engines, transmissions, or parts.
  • Installation and Application Expenses: JDM of California is not liable for any expenses incurred in the installation or application of our products, including but not limited to shipping and labor costs.
  • Shipping Timeline: Orders typically ship within 2-4 business days, with an estimated delivery timeframe of 3-14 business days depending on the location.
  • Non-Refundable Shipping Fees: Shipping fees and delivery fees are non-refundable.
  • Order Cancellation: A 2.90% cancellation fee will be applied to all online order cancellations.
  • $35.00 service charge on all returned checks.
  • We do not accept personal checks.

Accessories / Parts Warranty

All sales of used accessories, including body parts, interior components, wheels, seats, and suspensions, are final and sold “as-is” without warranty or eligibility for return/exchange.

JDM of California is not responsible for any damage caused by improper installation, including but not limited to:

  • Over-tightening or under-tightening of bolts, sensors, fittings, or components

  • Stripped threads

  • Cracked housings (including oil filter housings, sensor ports, or mounting points)

  • Broken bolts or damaged bolt holes

  • Damage caused by improper torque specifications

Any damage resulting from incorrect installation, excessive force, or failure to follow manufacturer torque specifications will void warranty coverage for the affected components.

All external components (including sensors, switches, housings, and fittings) are sold as-is and are not covered under warranty.

Policy on Resold Products

  • JDM of California does not provide product information, history, or warranty support for items purchased from a third party.
  • If a product was purchased from a previous customer, reseller, or any marketplace platform not directly associated with JDM of California, we reserve the right to refuse any requests for information, support, or warranty claims related to the product.
  • To ensure the authenticity and warranty of your purchase, always buy directly from JDM of California.

 

JDM of California reserves the right to modify this warranty policy at any time.