Warranty & Inspection

Every engine we sell is multi-point inspected and compression-tested before it ships. Here's exactly what's covered, for how long, and how to file a claim.

Warranty terms at a glance

Item	Warranty
Naturally-aspirated (standard) engines	90 Days
Turbo / supercharged / performance engines	30 Days
Replacement transmissions	30 Days
Performance transmissions	30 Days
Rotary engines (RX-7 13B / 20B)	As-Is
All electronic parts & accessories	As-Is

The warranty period begins on the date of sale. Repairs or exchanges do not extend the original term. Warranty covers the engine being in serviceable condition given the nature of used engines — it is a start-up/serviceability warranty, not a guarantee against all wear.

Inspection & testing

JDM Alliance LA prides itself on quality. Every engine passes a multi-point inspection and compression test, and we only ship engines with positive compression results. All units are genuinely imported low-mileage engines (typically 20,000–60,000 miles) pulled from running vehicles in Japan.

What the warranty covers

All internal engine components: pistons, rings, pins, crankshaft and main bearings, connecting rods and rod bearings, camshaft and bearings, intake and exhaust valves, valve springs, seals, guides, oil pump, push rods, rocker arms and shafts. The engine block, cylinder walls and cylinder head are warranted free of cracks or distortion. Head gaskets are warranted for 30 days regardless of engine type. We reserve the right to repair with serviceable used parts or exchange the engine at our discretion.

What the warranty does not cover

External parts

VVT-i / VTEC systems, intake/exhaust manifolds, distributor, starter, alternator, water pump, thermostat, belts, hoses, sensors, injectors, ECUs, flywheel, clutch, pressure plate, mounts — all external accessories are provided for testing/convenience only and are not warranted.

Labor & freight

Labor to remove/install an engine, towing, and freight or delivery charges are not covered.

Misuse & overheating

Damage from abuse, neglect, accident, improper installation, overheating (clogged radiator, stuck thermostat, faulty water pump), modification, forced induction the engine wasn't designed for, or competitive/racing use.

Maintenance items

Tune-ups, filters, hoses, belts, lubricants, coolants, spark plugs, and normal wear-and-tear without an actual breakdown. Damage from a defective/uninstalled timing belt is not covered — a new timing belt must be installed.

Requirements to keep your warranty valid

Failure to follow these voids the warranty. The engine must be installed, maintained, and adjusted by a certified mechanic. Set ignition timing to manufacturer spec. Change the oil after the first 500 miles. Re-torque cylinder head bolts to spec. Inspect and service the cooling system, replacing coolant if rusted or contaminated. You must replace the timing belt, oil filter, water pump and spark plugs before/at installation.

How to file a warranty claim

Contact us and we'll email a warranty claim form to complete. The customer is responsible for freight on returned engines. No replacement is sent until our staff inspects and verifies the returned engine. If found defective, we will send a replacement or issue a refund minus shipping. The engine must be returned in the same condition it was sent — missing parts are charged to the customer. If a wrong/defective engine is not returned within 60 days of a replacement being sent, the customer is charged the full engine price plus freight. We cannot accept an engine that has been disassembled or parted.

Freight & delivery inspection

Do not sign the freight release without first inspecting the outer packaging for damage. Freight companies will not let you open the package before signing, so note any visible damage on the release form. Shipping insurance is provided by the freight company, not JDM Alliance LA. If you sign without noting damage, the carrier is released from responsibility and damages will not be reimbursed.

Sales policy

All sales are final — no refunds or exchanges except as covered by warranty above, or where we posted incorrect Japanese specifications.
Deposits are non-refundable. Orders can be cancelled only if not yet shipped.
A $25 fee applies to cancelled orders paid by check.
Cancelled / refused / returned orders are charged 25% restocking plus all freight to return the item to our warehouse.
Shipping/transportation charges are non-refundable. Local pickup at our Vernon warehouse is always free.

Emissions note: Engines may not comply with the emission laws of your state. You are required to transfer emission devices from your original engine. Add-on parts are attached for testing/convenience only and are free of charge; the purchase price represents the long block (cylinder head and short block).

Questions about a specific engine's warranty? Call us at (442) 888-0318 or email info@jdmalliancela.com.