Warranty Policy

We Stand Behind Every Part We Sell

At Prime Auto Parts, we are committed to supplying quality engines, transmissions, trailers, and automotive components that meet our inspection standards. Our warranty is designed to provide confidence in your purchase while clearly outlining the coverage available for each product category.

Every eligible product is sold with written warranty coverage, and the specific warranty applicable to your purchase is confirmed on the product listing and your order confirmation.

Warranty Coverage by Product Category

Warranty coverage varies depending on the type of product purchased and its condition grade.

JDM Engines

Coverage: 30–90 Days

Our JDM engines are compression-tested before sale and are covered against internal mechanical failure when properly installed, maintained, and operated under normal conditions.

Coverage includes:

  • Engine block
  • Cylinder heads
  • Crankshaft
  • Camshaft
  • Internal lubricated components

Bolt-on accessories such as alternators, starters, power steering pumps, sensors, wiring, belts, hoses, and intake components are not covered unless specifically stated on the product listing.

Transmissions

Coverage: 30–90 Days

Our automatic and manual transmissions are inspected and tested before shipment.

Warranty coverage applies to internal mechanical failure occurring during normal operation.

Coverage includes:

  • Internal gear sets
  • Internal shafts
  • Valve body (automatic transmissions)
  • Torque converter (where applicable)
  • Internal lubricated components

External components, mounts, linkage assemblies, electrical connectors, and accessories are not covered unless otherwise stated.

Trailers

Coverage: One-Year Structural Warranty

New and dealer-inspected trailers include structural warranty protection covering manufacturing defects affecting the primary frame.

Coverage includes:

  • Main frame
  • Tongue assembly
  • Structural welds
  • Cross-members

Axles and suspension components are covered according to the applicable manufacturer’s warranty where applicable.

Normal wear items, electrical wiring, lighting, tires, brakes, bearings, and routine maintenance items are excluded unless otherwise specified.

Warranty Terms by Grade

Engines and transmissions are graded according to mileage, compression results, overall condition, and inspection findings.

Grade Typical Condition Warranty
Grade A Low mileage with excellent compression and minimal wear 90 Days
Grade B Moderate mileage with good compression and normal wear 60 Days
Grade C Higher mileage with acceptable compression and visible wear 30 Days
Run-Tested Tested and verified prior to shipment 30–90 Days (as listed)
Trailers New or dealer-inspected inventory One-Year Structural

The exact warranty period for every purchase is confirmed on the product listing and included in your order confirmation.

What Is Covered

Subject to the applicable warranty period, coverage includes:

  • Internal mechanical failure during normal use
  • Manufacturing defects present before delivery
  • Failures consistent with the product’s inspection and testing report
  • Structural weld defects on eligible trailers caused by manufacturing defects
  • Defects confirmed through our warranty review process

What Is Not Covered

Warranty coverage does not include:

  • Improper installation
  • Incorrect vehicle application
  • Damage caused by overheating
  • Lack of lubrication or required fluids
  • Cooling system failure
  • Neglect or poor maintenance
  • Racing, commercial abuse, or off-road misuse
  • Modified, dismantled, or altered products
  • Gaskets, seals, belts, hoses, filters, spark plugs, wiring, sensors, tires, brake components, bearings, or other normal wear items
  • Accident, collision, flood, fire, theft, or environmental damage
  • Products specifically sold “As-Is” or identified as having no warranty

Warranty Claim Process

If you experience an issue covered by your warranty, our claims process is designed to resolve it as efficiently as possible.

Step 1 – Contact Our Team

Provide your order number along with a detailed description of the issue you are experiencing.

Step 2 – Diagnostic Review

Our technical team will review your claim and may request supporting photographs, videos, inspection reports, or additional diagnostic information.

Step 3 – Claim Evaluation

After reviewing the submitted information, we will determine whether the issue qualifies under the applicable warranty coverage.

If approved, we will explain the available resolution options.

Step 4 – Resolution

Depending on the circumstances of the claim, Prime Auto Parts may provide one or more of the following:

  • Replacement part
  • Repair assistance where appropriate
  • Full or partial refund
  • Alternative mutually agreed solution

Where return shipping is required, instructions will be provided before any product is returned.

Core Charges

Some engines and transmissions are sold with a refundable core charge.

Core charge refunds are processed separately from warranty claims.

To receive a core refund, the returned core must meet the applicable return requirements and successfully pass inspection upon arrival.

Warranty Frequently Asked Questions

How long is my warranty?

Warranty periods vary by product category and condition grade. The exact warranty applicable to your purchase is shown on the product listing and your order confirmation.

Can I install the part myself?

Yes. You may install the product yourself or have it installed by a professional.

However, damage resulting from improper installation, incorrect application, or failure to follow accepted installation procedures is not covered.

What if my warranty expires?

If you experience a problem after the warranty period has expired, we still encourage you to contact our customer support team.

Although coverage cannot be guaranteed outside the warranty period, we will review your situation and determine whether any assistance can be offered.

How are core charge refunds processed?

Core refunds are issued after the eligible core has been returned, inspected, and approved according to our core return requirements.

Core refunds are handled independently from warranty claims.

Are trailers covered under the same warranty as engines?

No.

Trailers carry a separate structural warranty covering the frame and structural welds against manufacturing defects.

Coverage for axles and certain components may be provided under the respective manufacturer’s warranty.

Questions About Our Warranty?

If you have any questions regarding warranty coverage before purchasing an engine, transmission, trailer, or other automotive component, our knowledgeable team is happy to assist you.

We’re committed to providing clear warranty information, dependable customer support, and confidence with every purchase from Prime Auto Parts.