Collection: Used Infiniti Engines For Sale | Auto Power Source

Browse Infiniti Engines by Year

Year-specific pages coming online weekly — text us your VIN and we will match you to the right Infiniti engine from our verified inventory today.

Infiniti Engines We Cover

Real engines from our warehouse, tested and ready to ship. Our Infiniti inventory spans every major Infiniti engine family produced for the U.S. market.

VR38DETT 3.8L Twin-Turbo V6

Halo twin-turbo V6 — hand-assembled in Yokohama. Limited supply; commands a premium. Tested and warrantied.

VR30DDTT 3.0L Twin-Turbo V6 (Red Sport)

Q50 / Q60 Red Sport (2016+). 400 HP and 300 HP variants — not interchangeable across output tunes. Tested and warrantied.

VK56DE / VK56VD 5.6L V8

QX56, QX80, Q70, M56. VD is direct-injection; DE is port-injection — different fueling and ECU. Tested and warrantied.

VK50VE 5.0L V8 (FX50)

FX50 (2009–2013). High-output performance V8 — distinct bore and cams from VK45 and VK56. Tested and warrantied.

VK45DE 4.5L V8 (M45 / FX45)

M45 (2003–2010), FX45 (2003–2008). Aluminum DOHC V8 — distinct from VH45DE. Tested and warrantied.

VH45DE 4.5L V8 (Q45)

Original Q45 (1990–1996). Premium DOHC V8 — Infiniti's flagship powerplant of the era. Tested and warrantied.

VQ37VHR 3.7L V6

G37, Q50, Q60, M37 (2007–2017). Variable valve event & lift system. Tested and warrantied.

VQ35HR 3.5L V6

G35 late, M35, EX35, Q70 hybrid. Higher compression, stiffer block, revised heads vs VQ35DE. Tested and warrantied.

VQ35DE 3.5L V6

G35 early, FX35, EX35, M35 (2002–2008). Earlier port-injection VQ — paired with different transmissions than HR. Tested and warrantied.

KR20DDET 2.0L VC-Turbo

QX50, QX55 (2019+). Variable-compression turbo I4 — clean-sheet engine, no shared parts to earlier Infiniti fours. Tested and warrantied.

Legacy Infiniti Engines

VG-series V6 (J30, older Q45), early I30/I35 VQ. Period-correct engines for 1990s and early-2000s Infiniti restorations. Tested and warrantied.

Why Buy a Used Infiniti Engine from Auto Power Source

We have spent over a decade sourcing quality Infiniti engines from carefully vetted suppliers across North America. Our 370+ verified Infiniti engines span every major Infiniti engine family across model years from the 1990s through present. Every Infiniti engine we sell has been pulled from a low-mileage donor vehicle, cataloged by VIN, and held in our climate-controlled warehouse pending sale.

Each unit went through our six-step inspection — VIN-matching, ASE testing, noise & smoke verification, full visual inspection, multi-angle photography, and palletized shipping. Our ASE-certified technicians compression-test every cylinder and run leak-down evaluation on engines. Transmissions are Shift-Tested through all gears — rejected units never reach the buyer.

You pay a fraction of dealer-new pricing for identical Infiniti engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get 30 days from delivery to return for any reason — no restocking fees. Up to a 3-year warranty covers you if anything goes wrong after install. Across 46,000+ engines and transmissions shipped, we hold a 0% fitment-related return rate.

Your Infiniti Engine Options: Compared

Most Infiniti owners face four real choices when their engine fails:

Tested used OEM hits the sweet spot — same engineering as new, fraction of the cost.

Infiniti Engine Buying Guide

Five things to verify before buying a used Infiniti engine:

1. Match the engine code by VIN. Infiniti engines often share displacement but differ in compression, valvetrain, and emissions hardware. Always verify the engine code, not just "3.5L V6" — it could be one of several different units.
2. Confirm trim and emissions package. California-emissions ULEV variants, federal-emissions models, and PZEV variants often share displacement but use different ECU calibration and exhaust hardware.
3. Verify auto vs. manual transmission application. Infiniti flywheel and starter geometry can differ between AT and MT applications even at the same displacement.
4. For turbocharged variants, ask about turbo condition. Inspect the turbocharger compressor and turbine wheels, wastegate, and intercooler condition before paying.
5. Always run the donor vehicle VIN if available. We provide this on request for any engine in our inventory — helping you verify mileage and service history.

Our ASE-certified technicians verify every one of these points against your VIN before any engine ships.

Frequently Asked Questions

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