Free Nationwide Shipping·Money-Back Guarantee — Everywhere, Guaranteed·Easy Financing on Engines & Transmissions

ALL 50 STATES • B2B & B2C • SAME-DAY DISPATCH BEFORE 3PM CT+1 714-502-5463

Warranty & Core Returns.

Honest terms in plain English. We stand behind every powertrain we ship.

Warranty Coverage

Remanufactured Engines
3 years / 100,000 miles (whichever comes first)
Rebuilt Transmissions
3 years / 100,000 miles
Used / Low-Mileage Engines
1 year / 30,000 miles
Differentials & Transfer Cases
2 years / 50,000 miles
Commercial / Fleet Use
1 year / unlimited miles

Core Return Policy

1. Receive your new unit
Your old core deposit is shown separately on the invoice.
2. Install & drain fluids
Drain oil/coolant/ATF and seal openings before return shipping.
3. Use our prepaid label
Email sales@quantumautopart.com — we issue a freight pickup label.
4. Refund within 7 business days
Full core deposit refunded to your original payment method once received & inspected.

Cores must be returned within 30 days of delivery. Block must not be cracked or damaged beyond rebuildable condition.

Money-Back Guarantee — Everywhere, Guaranteed.

Every order, every state, every part category. Free nationwide shipping is included — no surprise freight charges, no restocking fees. Every powertrain ships with our written Guaranteed Cash-Back Promise. If a covered failure occurs within the warranty period and cannot be resolved through repair or replacement, you receive a full cash refund — no restocking fees, no hidden deductions.

Full purchase price refunded to original payment method
Refund processed within 7 business days of unit return
Outbound and return freight covered by Quantum

Cancellation & Full Refund

Plans changed? Cancel any order before it ships and receive a 100% full refund — including any deposit or core charge. No paperwork, no questions asked.

Pre-shipment cancellation: full refund, zero fees
Post-delivery: 30-day return window, full refund on uninstalled units
Wrong part shipped? We pay freight both ways + 100% refund

Installation Requirements

To maintain warranty: install by an ASE-certified technician, replace all wear items (water pump, thermostat, oil cooler, gaskets), use OEM-spec fluids, and complete the install within 30 days of delivery. Save your installation receipt — we'll request it for any warranty claim.