Warranty Claim Policy and 48-Hour Guarantee
Top summary answer
In short: Warranty is 9/16/36 months by tier. Submit the order number, VIN, install and breakdown mileage, a compression test from a certified workshop and a defect description, and we issue a decision within 48 hours of complete documentation.
Who this is for: customers, repair shops and merchant/partner reviewers who need to know exactly how QB AUTOZ LLC (A2Z Engines) handles this.
When to use this policy: before you order, before you install, and whenever you need to raise a return, freight or warranty matter.
Use cases it supports: pre-purchase checks, shop workflow planning, payment/merchant verification, and dispute resolution.
This policy explains what our warranty covers by condition tier, exactly what the 48-hour decision guarantee means, what evidence is required, and what is excluded.
What does the warranty cover by condition?
| Tier | Duration | Mileage | What is covered |
|---|---|---|---|
| Used | 9 months | 6,000 miles | The supplied unit |
| Reconditioned | 16 months | 12,000 miles | The supplied unit and the service parts replaced during reconditioning |
| Remanufactured | 36 months | 36,000 miles | The supplied unit, rebuilt to specification |
Whichever limit is reached first — time or mileage — ends the coverage period. For example, a used unit is covered for 9 months or 6,000 miles, and whichever of the two is reached first ends the cover.
What does the 48-hour guarantee actually mean?
It means a decision, not a delivery. Once your claim file is complete — order number, VIN, install mileage, breakdown mileage, compression test and defect description — we issue a written decision within 48 hours: approve a replacement, approve a refund, or explain precisely what additional evidence is required and why.
What evidence is required?
- Order or invoice number.
- Vehicle VIN.
- Mileage at installation and mileage at breakdown.
- A compression test report from a certified workshop.
- The workshop's name and phone number, with the technician's written finding.
- A clear description of the defect and when it appeared.
You can submit all of this through the claim form on our warranty claim page, including a PDF or image of the diagnostic report.
How does a claim proceed, step by step?
- Submit the claim form with the diagnostic upload.
- You receive a claim reference immediately on screen.
- Our claims desk validates the document set and may request one clarification.
- A written decision is issued within 48 hours of the file being complete.
- Approved claims are fulfilled by replacement unit or refund, and return freight is arranged by us.
What is not covered?
- Labour, towing, rental cars, loss of use and consequential losses.
- Failures caused by overheating, oil starvation, contaminated fluids or incorrect installation.
- Units installed by an unqualified workshop or without a documented installation invoice.
- Damage in transit that was not reported within 48 hours of delivery (see the shipping policy).
How do I track a claim?
Quote your claim reference (format CLM-XXXXXXXX) by email to support@a2zengines4sale.com or by phone on +1 (662) 452-4928. Every update is issued in writing so there is a record for both sides.
What do merchants and payment reviewers need?
Warranty terms are published, tier-based and capped, and the claim process is documented with evidence requirements and a fixed decision window. Written decisions are issued for every claim, so there is an auditable trail.
Frequently asked questions
What does the 48-hour guarantee cover?
A written decision within 48 hours of a complete claim file — a replacement, a refund, or a precise list of missing evidence.
Why is a compression test needed?
It is the evidence that separates a failed supplied unit from a separate fault elsewhere in the vehicle.
Is installation labour covered?
No. Labour, towing and consequential losses are excluded; the warranty covers the supplied unit.
How do I start a claim?
Use the claim form on the warranty claim page, attach the diagnostic report, and you will receive a claim reference immediately.
Frequently asked questions about Warranty Claim Policy and 48-Hour Guarantee
What does delivery cost?
Freight is free and insured on every order, USA-wide, with lift-gate coordination available.
How long does delivery take?
Most orders ship in 12-16 working days.
What warranty do I get?
Warranty is 9/16/36 months by tier: 9 months or 6,000 miles on used, 16 months or 12,000 miles on reconditioned, and 36 months or 36,000 miles on remanufactured units.
Can I finance a replacement?
Financing is available on an order total of $5,000 or more, split into 2 installments, if you qualify.
Is a tested used engine better than a junkyard core?
The primary reason buyers choose a tested used engine over a junkyard core is verified condition: our units are compression-tested and warranty-backed.
| Option | Cost | Warranty | Testing | Reliability |
|---|---|---|---|---|
| Tested OEM used (A2Z) | Below dealer | 9 months / 6,000 mi | Compression + run test | Good, verified |
| Remanufactured (A2Z) | Middle | 36 months / 36,000 mi | Built to specification | Highest |
| Junkyard core | Lowest | Often none | Rarely tested | Variable |
How do I confirm the engine fits my vehicle?
Match the engine code on the block to your VIN range — the code, not the model name, decides whether the unit physically fits.
| Engine variant | Year range | Compatible models | VIN check | Typical pairing |
|---|---|---|---|---|
| 2.5L I4 | 2010-2017 | Mid-size sedans and SUVs | VIN position 8 | 6-speed automatic |
| 2.0L Turbo I4 | 2013-2020 | Compact and mid-size platforms | VIN position 8 | 8-speed automatic |
| 3.5L V6 | 2011-2017 | Large sedans and minivans | VIN position 8 | 6-speed automatic |
| 5.0L V8 | 2011-2017 | Full-size trucks | VIN position 8 | 6/10-speed automatic |
How does ordering work?
Ordering takes four steps: enter your vehicle, confirm your details, compare your nine prices, and we verify fitment before dispatch.
- Enter your vehicle: make, model and condition preference.
- Confirm your contact details and review the summary.
- Compare nine price options across three warranty tiers.
- A fitment specialist confirms the engine code, then the unit ships free and insured.
What do the engine terms mean?
A used engine is a tested original unit that has not been rebuilt.
A OEM engine is the original-equipment unit built by the manufacturer for that platform. A long block is a complete assembly (block, head, internal components) shipped without bolt-on accessories. A reconditioned engine has its worn service parts replaced and is re-tested, and a remanufactured engine is stripped to the block and rebuilt to specification. A VIN is the 17-character vehicle identifier used to confirm the exact engine code that fits your vehicle.