Returns, RMAs & Core Returns

This page explains our procedures for product returns (RMA) and core returns. Please read the section that applies to your situation to ensure fast processing and avoid delays.

Quick Links:
Product Returns (RMA) Core Returns

Product Returns, Exchanges & Warranty (RMA Required)

An RMA (Return Merchandise Authorization) is required for all product returns, exchanges, and warranty claims. Do not ship anything back until you receive your RMA number by email. Returns sent without an approved RMA number may be refused or delayed.

How to Request an RMA

  1. Submit the RMA request form.
  2. Our team will review your request.
  3. If approved, you will receive your RMA number by email.
  4. Once you have your RMA number:
    • Download the RMA Return Slip from this page.
    • Write your Name, RMA Number, and Order Number on the slip.
    • Place the slip inside the return package.
  5. Ship the item to the address provided in your RMA email.
Important: All RMA returns must include a printed RMA Return Slip inside the package with your RMA number clearly written on it. Returns received without proper identification may be delayed or refused.
Download RMA Return Slip

Eligible Returns

  • Incorrect items shipped
  • Defective or damaged items
  • Warranty claims (subject to manufacturer inspection)
  • Unused and uninstalled items (within the approved return window)

Non-Returnable Items

  • Installed or modified parts
  • Electrical components (if applicable)
  • Special-order or custom items
  • Clearance or closeout items

All returns are inspected before approval. Refunds are issued to the original payment method. Please allow 3–7 business days after inspection for processing.

Core Returns (Core Charge Refunds)

Core returns are separate from RMAs and follow the policy below unless otherwise instructed.

What Is a Core?

A core is your original used part that was replaced by a new or remanufactured unit. The core charge helps keep rebuildable parts in circulation and reduces overall costs.

Core Charge Timeline

  • 0–21 days: 100% refund of the core charge
  • 22–60 days: 80% refund of the core charge
  • 61–90 days: 50% refund of the core charge
  • Over 90 days: No guaranteed refund; acceptance at Diesel Fuel Injection Service’s discretion
  • After 6 months: Cores may be accepted at our discretion, but refunds are not guaranteed

All cores are subject to inspection. Incomplete, damaged, or non-rebuildable cores may be denied credit or receive partial credit at our discretion.

Core Return Procedure

  1. Download the Core Return Slip from this page.
  2. Complete the slip with your order and part information.
  3. Package your core following the guidelines below.
  4. Place the completed slip inside the box.
  5. Ship the core using your preferred carrier.
  6. Email your tracking number to: returns@dfispdx.com
Important: Core returns must include a completed Core Return Slip inside the package. Core refunds cannot be guaranteed without proper paperwork and a tracking number.
Download Core Return Slip

Core Packaging Requirements

  • Use the original packaging from your new part if possible
  • Drain all fluids (oil, fuel, coolant, etc.) before shipping
  • Reinstall any plugs or caps that came with the new part
  • Wrap the core in a plastic bag to prevent leaks and carrier rejection
  • Secure the item inside the box to prevent damage during transit

Shipping & Processing

  • Ship via UPS, FedEx, USPS, or Freight (for large/heavy items)
  • Insured shipping is recommended for high-value cores
  • Cores are inspected upon arrival; refunds are processed within 3–7 business days after inspection

Non-Acceptable Cores

  • Severely rusted or damaged beyond reuse
  • Missing critical components
  • Not drained of fluids
  • Improperly packaged or leaking

Core Department Contact

Email: returns@dfispdx.com
Phone: 503-235-1947

Policy Acknowledgment

By submitting a return or core, you acknowledge that you have read and agree to the policies and procedures listed above.