- M45 4.5L Vin A 4Th Digit 2003, 2004
Infiniti M45 4.5L, VIN A, 4th digit 4.5L Engine (2003-2004)
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- 1Enter or confirm your VIN
- 2We verify exact fitment for your vehicle
- 3Flat freight shown up front — no surprises
- 490-day warranty included on every part
- 5We photograph & confirm the unit before it ships
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About this part
OEM 4.5L V8 Engine for 2003-2004 Infiniti M45
Restore your Infiniti M45's commanding V8 performance with our OEM 4.5L VK45DE engine. Designed specifically for 2003-2004 M45 models (4th VIN digit A), this premium V8 powerplant delivers the authoritative power and refined acceleration that defined Infiniti's flagship luxury sedan.
Engine Specifications:
| Category | Details |
|---|---|
| Displacement | 4.5L V8 |
| Engine Code | VK45DE (VIN A) |
| Horsepower | 340 HP |
| Torque | 333 lb-ft |
| Fuel System | Electronic Multi-Port Fuel Injection |
| Valvetrain | DOHC 32-Valve with CVTCS |
| Block Material | Aluminum Block & Heads |
| Emissions | LEV Compliant |
Compatibility: 2003-2004 Infiniti M45 4th VIN Digit A.
Pricing & Condition Options:
| Mileage Range | Price | Condition |
|---|---|---|
| 30K-60K Miles | $ 1,911.00 | Low mileage, excellent compression, full service records |
| 60K-90K Miles | $ 1,534.00 | Well-maintained, strong performance, minimal wear |
| 90K-120K Miles | $ 1,106.30 | Good condition, includes updated timing components |
| 120K-150K Miles | $ 754.00 | Cost-effective solution for M45 V8 restoration |
Key Features:
Complete Long Block Assembly: This complete engine assembly delivers all essential internal components block, crankshaft, pistons, cylinder head, and full valvetrain—ready for installation in your 2003-2004 Infiniti M45 4.5L application.
Smooth & Reliable: We guarantee that the engine will not smoke, leak or sound. It will be a good smooth runner.
Backed by Warranty: Backed by comprehensive warranty coverage across all assembly components, this engine delivers the confidence and protection you need for a dependable long-term installation.
Shipping Information:
Standard shipping 5-7 business days
Fast-track shipping is available for an additional charge
Frequently Asked Questions?
Q: Is this engine compatible with the M45's 5-speed automatic transmission?
A: Yes, this engine is specifically calibrated for the M45's 5-speed automatic transmission with manual shift mode and adaptive shift control.
Q: What's the difference between the VK45DE and the VQ V6 engines?
A: The VK45DE is a larger displacement V8 engine providing significantly more torque and horsepower while maintaining the smooth, refined character expected in a luxury flagship.
Q: Will this engine work with all M45 trim levels?
A: Yes, this engine is compatible with all 2003-2004 M45 models regardless of trim or option packages.
Ready to Order?
Select your desired mileage tier in the cart, then proceed to checkout. Our Infiniti engine specialists are available to confirm fitment for your specific vehicle and provide technical guidance throughout the V8 installation process.
Tested, VIN-matched, and guaranteed
VIN-Verified Fit
We match the part to your vehicle's VIN and confirm exact fitment before we ship — so it fits the first time. Free cancellation within 24 hours.
Works on Arrival, Guaranteed
Every unit is tested before it ships. If it arrives defective, we replace it fast — and in the rare case we can't replace it, you get a full refund.
90-Day Warranty
A real parts-replacement warranty, included — with extended coverage available.
Heavy freight item, shipped fully insured and tracked. Freight is a flat $250 commercial / $400 residential, shown at checkout — no hidden fees, no freight-quote runaround.
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