About A2Z Engines
Top summary answer
In short: QB AUTOZ LLC trades as A2Z Engines, supplying used, reconditioned and remanufactured engines and transmissions USA-wide from 140 McNair Springs Rd, Mount Olive, MS 39119, with fitment verified against your engine code and free insured freight.
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.
QB AUTOZ LLC trades as A2Z Engines. We supply used, reconditioned and remanufactured engines and transmissions to vehicle owners, independent repair shops and rebuilders across the United States.
What is the direct-supplier model?
Most replacement engines pass through at least one intermediary before they reach a workshop; for example, a unit can be bought at auction, resold to a jobber and resold again to a shop. We buy directly from supplier warehouses and quote against the engine code we can actually obtain, which removes a mark-up layer and makes the freight part of the quoted price rather than a separate surprise.
Where do you operate from?
Our registered and operating address is 140 McNair Springs Rd, Mount Olive, MS 39119, USA. Engines are prepared and dispatched from that facility, and the address appears on invoices, claims correspondence and our Organization structured data.
What are your inspection standards?
- Engine code confirmation — the code on the unit is matched to your VIN range before dispatch.
- Compression testing — cylinders are tested and the result is recorded against the dispatch file.
- Run testing — where the unit permits, it is run and checked for abnormal noise and fluid loss.
- Visual and seal inspection — cracks, stripped threads, damaged mounts and leaking seals are checked and recorded.
- Documentation — condition tier, mileage and warranty tier are attached to the order record.
Which condition tiers do you sell?
| Tier | What it means | Warranty |
|---|---|---|
| Used | A tested original unit that has not been rebuilt | 9 months / 6,000 miles |
| Reconditioned | Worn service parts replaced and the unit re-tested | 16 months / 12,000 miles |
| Remanufactured | Stripped to the block and rebuilt to specification | 36 months / 36,000 miles |
Who do we serve?
- Vehicle owners — replacing a failed engine in a car, truck or SUV.
- Independent repair shops — sourcing a unit for a customer job with a documented warranty.
- Rebuilders and small fleets — planning downtime around a known delivery window.
What do we guarantee in writing?
- Free, insured freight on every order, USA-wide, with a typical 12-16 working day lead time.
- A tier-based warranty with a published claim protocol and a 48-hour decision window on complete files.
- A 30-day return window for unused units, with restocking terms stated up front.
Who writes and reviews our guides?
Our technical guides are written by two career engine specialists and reviewed by the owner before publication — every claim has to be traceable to a real workshop experience or a named source.
Michael “Mike” Miller — Technical Content Lead
Mike is a certified engine technician with 17 years in the trade and leads our technical content. He has spent his career diagnosing and rebuilding engines and transmissions — misfires, coolant loss, oil consumption, timing failures and the jobs other shops had already declined — and now turns that experience into our diagnosis guides. Mike writes about what a fault code actually proves, which tests separate a failed engine from a failed sensor or a wiring fault, and when a tested used engine is the sensible repair instead of a rebuild. He signs off every technical claim published on this site.
David “Dave” Anderson — Fitment and Sourcing Lead
Dave is a certified engine and transmission specialist with 22 years in the trade. He leads fitment and sourcing — matching engine codes to vehicles, the step that decides whether a replacement drops straight in or comes back on a truck — alongside sourcing, freight coordination and warranty administration. Dave writes our buying guides: used versus reconditioned versus remanufactured, what a fair price actually looks like, why the same model year can take two different engines, and the mistakes that cost buyers a second engine.
Landon Ray Welch — Owner and Manager
Landon owns and manages QB AUTOZ LLC (A2Z Engines). He is responsible for supplier relationships, customer outcomes and the warranty standards published on this site, and he reviews every policy page and claim decision personally.
Author profile pages and LinkedIn profiles for our specialists are being published on this site shortly.
How do I reach you?
140 McNair Springs Rd, Mount Olive, MS 39119, USA · +1 (662) 452-4928 · support@a2zengines4sale.com. Policies: shipping, returns, terms, privacy, warranty claims.
Frequently asked questions
What is the legal name of the business?
QB AUTOZ LLC, trading as A2Z Engines.
Where are you based?
140 McNair Springs Rd, Mount Olive, MS 39119, USA.
What warranty do you offer?
9/16/36 months by tier: used, reconditioned and remanufactured.
Do you ship nationwide?
Yes, USA-wide, with free insured freight and a typical 12-16 working day lead time.
Frequently asked questions about About A2Z Engines
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.