The 2005 Infiniti QX56 marked Infiniti's robust entry into the full-size luxury SUV segment. This first-generation model, produced from 2004-2010, sports a imposing body-on-frame SUV style. It was primarily offered in a single, well-equipped trim, with an original MSRP starting around $50,000. Its powerful 5.6L V8 engine, luxurious interior, and standard features like navigation and a rearview camera made it stand out as a value-packed, American-built alternative to its domestic and European rivals.
The Good
The 2005 QX56 offers impressive performance with its strong V8, delivering ample power for confident acceleration and towing. Its spacious, plush interior ensures excellent comfort for all passengers, making long journeys enjoyable. The bold, commanding design appeals to those seeking a luxurious presence. Practically, it's a capable family hauler with substantial cargo room, and its robust feature set translates to significant used market value for luxury on a budget.
The Bad
Known weaknesses of the 2005 QX56 include notoriously poor fuel efficiency, dashboard cracking in warmer climates, and potential issues with its automatic leveling air suspension. Owners should also watch out for timing chain guide wear and potential radiator/transmission cooler failures, which can lead to costly repairs. Its sheer size can also make urban parking and maneuvering challenging.
2005 Infiniti QX56: Quick Overview
- Engine: 5.6-liter DOHC 32-valve V8 (VK56DE)
- Horsepower: 340 hp @ 5,200 rpm
- Torque: 390 lb-ft @ 3,200 rpm
- Transmission: 5-speed automatic with Tow/Haul mode
- Drivetrain: Available in 2WD (Rear-Wheel Drive) or All-Mode 4WD
- Fuel Economy (EPA estimated):
- 2WD: 13 mpg city / 18 mpg highway
- 4WD: 13 mpg city / 17 mpg highway
- 0-60 mph: Approximately 7.0 seconds
- Towing Capacity:
- 2WD: Up to 9,000 lbs (with proper equipment)
- 4WD: Up to 8,900 lbs (with proper equipment)
- Key Trim-Level Features (Essentially one well-equipped trim):
- Standard leather-appointed seating (7- or 8-passenger configurations)
- Power-adjustable heated front seats
- Tri-zone automatic climate control
- Bose 10-speaker premium audio system with in-dash 6-CD changer
- DVD-based navigation system with 7-inch LCD screen
- Rearview monitor (standard)
- Power liftgate
- Heated steering wheel
- 18-inch alloy wheels
- Optional rear-seat DVD entertainment system with 8-inch screen
- Optional 20-inch chrome wheels
- Power-folding third-row seats
- Front and rear parking sensors
2005 Infiniti QX56 Specifications
Vehicle Information
| Year | 2005 |
| Make | Infiniti |
| Model | QX56 |
| Trim | - |
| Style | Rear-Wheel Drive |
| Type | Sport Utility Vehicle |
| Category | Standard Sport Utility Vehicle |
Manufacturing Details
| Made In | United States |
| Manufacturing City | CANTON |
Dimensions
| Doors | 4-Door |
| Curb Weight | 5360 pounds |
| Gross Vehicle Weight Rating | 6800 pounds |
| Overall Height | 77.00 inches |
| Overall Length | 206.90 inches |
| Overall Width | 78.80 inches |
| Wheelbase Length | 123.20 inches |
| Standard Seating | 7 |
Engine & Performance
| Engine | 5.6-L V-8 DOHC 32V |
| Engine Size | 5.6L |
| Engine Cylinders | 8 |
| Transmission | 5-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 5-Speed |
| Drivetrain | Rear-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Rack & Pinion |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $48,000 |
| Invoice Price | $44,101 |
| Delivery Charges | $700 |
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What Problems Does the 2005 Infiniti QX56 Have?
The 2005 Infiniti QX56, while offering luxury and power, is associated with several frequently reported problems that potential buyers should be aware of. A pervasive issue, especially in hotter climates, is dashboard cracking, where the dash material develops extensive cracks around the air vents and passenger airbag cover. Another common concern involves the automatic ride leveling system (ARLS), or air suspension. Components such as the air compressor, air bags, and height sensors can fail, leading to a sagging rear end and an uncomfortable ride; many owners opt for a more reliable, albeit less luxurious, coil spring conversion.
A significant mechanical long-term reliability concern for the 2005 model, shared with other Nissan/Infiniti vehicles using the VK56DE engine, is timing chain guide wear. As the plastic guides wear down, the timing chain can become noisy and, if left unaddressed, can lead to severe engine damage. This is a costly repair due to extensive labor.
Early first-generation QX56 models, including the 2005, are susceptible to a critical flaw involving the radiator's internal transmission cooler. A failure here can allow coolant to mix with transmission fluid, often termed the "strawberry milkshake of death," which rapidly destroys the transmission. It's highly recommended to verify if this issue has been preemptively addressed or if an external transmission cooler has been installed.
Other reported problems include premature wear of the exhaust manifold bolts, leading to exhaust leaks and ticking sounds, and issues with the fuel level sender causing inaccurate fuel gauge readings. Headlight assemblies can also fog or yellow over time, and the HID components may fail. Several recalls were issued for the 2005 QX56, notably for the Takata passenger airbag inflator, which required replacement.
A significant mechanical long-term reliability concern for the 2005 model, shared with other Nissan/Infiniti vehicles using the VK56DE engine, is timing chain guide wear. As the plastic guides wear down, the timing chain can become noisy and, if left unaddressed, can lead to severe engine damage. This is a costly repair due to extensive labor.
Early first-generation QX56 models, including the 2005, are susceptible to a critical flaw involving the radiator's internal transmission cooler. A failure here can allow coolant to mix with transmission fluid, often termed the "strawberry milkshake of death," which rapidly destroys the transmission. It's highly recommended to verify if this issue has been preemptively addressed or if an external transmission cooler has been installed.
Other reported problems include premature wear of the exhaust manifold bolts, leading to exhaust leaks and ticking sounds, and issues with the fuel level sender causing inaccurate fuel gauge readings. Headlight assemblies can also fog or yellow over time, and the HID components may fail. Several recalls were issued for the 2005 QX56, notably for the Takata passenger airbag inflator, which required replacement.
How long will the 2005 Infiniti QX56 last?
With diligent maintenance, a 2005 Infiniti QX56 can achieve an average mileage of 150,000 to 200,000 miles, with many dedicated owners reporting service beyond 250,000 miles. Its underlying Nissan Armada platform provides a robust foundation, and the VK56DE V8 engine is generally durable if properly cared for. However, long-term durability is heavily influenced by addressing known weaknesses. The automatic air suspension system is a common failure point that degrades ride quality and incurs repair costs over time. Dashboard cracking and headlight degradation are persistent cosmetic issues. Crucially, the longevity depends on proactive maintenance regarding the timing chain guides and ensuring the radiator's transmission cooler issue has been mitigated, as neglect of these can lead to premature engine or transmission failure.
What Technology & Safety Features are Included?
The 2005 Infiniti QX56 came impressively equipped for its time, blending luxury with practical technology. Standard built-in tech and entertainment features included a 7-inch LCD display for its DVD-based navigation system, a premium Bose 10-speaker audio system with an in-dash 6-CD changer, and AM/FM/cassette capability. A notable advanced feature for 2005 was the standard rearview monitor, significantly aiding parking and safety. Passengers also benefited from tri-zone automatic climate control, heated front seats, and a heated steering wheel, enhancing comfort in various conditions. Optional entertainment features included a rear DVD entertainment system, typically featuring an 8-inch screen for second-row passengers.
Driver-assistance features were somewhat limited compared to modern vehicles but included the aforementioned rearview monitor and standard front and rear parking sensors to assist with maneuvering the large SUV. Safety was a strong suit, with comprehensive features including dual-stage front airbags, front seat-mounted side-impact airbags, and roof-mounted curtain airbags providing protection for all three rows of occupants. Standard active safety systems comprised Vehicle Dynamic Control (VDC) with traction control, 4-wheel anti-lock brakes (ABS) with Electronic Brake-force Distribution (EBD), and Brake Assist (BA), all contributing to vehicle stability and control. A tire pressure monitoring system was also standard.
Regarding crash-test ratings, the National Highway Traffic Safety Administration (NHTSA) awarded the 2005 QX56 excellent scores: 5 out of 5 stars for Frontal Driver, Frontal Passenger, Side Front, and Side Rear impacts. Its rollover resistance received a 3-star rating for both 2WD and 4WD models. The Insurance Institute for Highway Safety (IIHS) did not conduct specific frontal offset or side-impact tests for this particular model year.
Driver-assistance features were somewhat limited compared to modern vehicles but included the aforementioned rearview monitor and standard front and rear parking sensors to assist with maneuvering the large SUV. Safety was a strong suit, with comprehensive features including dual-stage front airbags, front seat-mounted side-impact airbags, and roof-mounted curtain airbags providing protection for all three rows of occupants. Standard active safety systems comprised Vehicle Dynamic Control (VDC) with traction control, 4-wheel anti-lock brakes (ABS) with Electronic Brake-force Distribution (EBD), and Brake Assist (BA), all contributing to vehicle stability and control. A tire pressure monitoring system was also standard.
Regarding crash-test ratings, the National Highway Traffic Safety Administration (NHTSA) awarded the 2005 QX56 excellent scores: 5 out of 5 stars for Frontal Driver, Frontal Passenger, Side Front, and Side Rear impacts. Its rollover resistance received a 3-star rating for both 2WD and 4WD models. The Insurance Institute for Highway Safety (IIHS) did not conduct specific frontal offset or side-impact tests for this particular model year.
What Colors Options are Available?
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2005 Infiniti QX56 Prices and Market Value
When new in 2005, the Infiniti QX56 carried an MSRP typically ranging from approximately $49,600 for the 2WD model to around $52,600 for the 4WD variant, with additional options pushing prices higher. Today, in 2024, current used market prices are significantly depreciated, generally falling between $3,000 and $8,000. This drastic depreciation is common for large, older luxury SUVs, which suffer from high running costs and age-related mechanical concerns. Factors heavily affecting resale value include overall condition, documented maintenance history (especially for critical repairs like timing chains or radiator replacement), mileage, and the resolution of known issues like dash cracking or air suspension failures. Vehicles with unresolved major mechanical problems will fetch considerably less. Premium fuel requirements and poor fuel economy further diminish its appeal and, consequently, its resale value.
2005 Infiniti QX56 Cost of Ownership
The 2005 Infiniti QX56 is generally a costly vehicle to own in the long term. Insurance costs can be higher than average due to its luxury status and repair expense. Fuel costs are substantial, given its large V8 engine and poor fuel economy (around 13-18 mpg), often requiring premium octane. Routine maintenance, such as oil changes and tire rotations, will be in line with other large SUVs but can be pricier due to Infiniti's luxury branding. However, potential major repairs for known issues like timing chain guides, air suspension, or transmission cooler failure can be extremely expensive, easily running into thousands of dollars. Budgeting a significant contingency for repairs is essential for long-term ownership.
2005 Infiniti QX56 Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
28.00 gallons
City Mileage
13 miles/gallon
Highway Mileage
19 miles/gallon
2005 Infiniti QX56 Safety Rating
NHTSA
IIHS
2005 Infiniti QX56 Warranty
Basic
Original warranty
48 months / 60,000 miles
Estimated remaining
Expired
Powertrain
Original warranty
72 months / 70,000 miles
Estimated remaining
Expired
Rust
Original warranty
84 months / unlimited miles
Estimated remaining
Expired
2005 Infiniti QX56 Insurance
Insurance for a 2005 Infiniti QX56 is moderately priced, reflecting its status as a Sport Utility Vehicle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2005 Infiniti QX56 Compare to Other Sport Utility Vehicle?
The 2005 Infiniti QX56 competed against a formidable class of full-size luxury SUVs, including the Cadillac Escalade, Lincoln Navigator, Lexus LX 470, and the GMC Yukon Denali.
In terms of Performance, the QX56's 340-hp 5.6L V8 was a strong contender, often out-powering the Navigator's 300-hp 5.4L V8 and surpassing the Lexus LX 470's 235-hp 4.7L V8. It was competitive with GM's offerings like the Escalade's 6.0L V8 (345 hp), offering robust acceleration and impressive towing capacity for its class.
Features were a QX56 strong point. It came remarkably well-equipped as standard, including navigation, a rearview camera, and a premium Bose sound system—features that were often optional or not as advanced in some rivals. The Escalade and Navigator offered similar luxury, though sometimes with more flashy styling or unique options. The Lexus LX 470 was known for its impeccable build quality and off-road prowess but felt less "tech-forward" than the Infiniti.
Reliability is where the QX56 faces its toughest comparison. While fundamentally robust, its known issues like timing chain guide wear, potential radiator/transmission cooler failure, and air suspension problems made it potentially less reliable and more costly to maintain than a Lexus LX 470, which is legendary for its bulletproof durability. GM's SUVs also have common issues (e.g., active suspension, electronics), but parts and labor might be more readily available and less expensive. The Navigator had its own set of powertrain concerns.
Regarding Price (Used), the QX56, like most older luxury SUVs, has depreciated significantly. It typically offers excellent bang for the buck, often found at lower prices than a comparable LX 470, which retains its value exceptionally well. Escalades and Denalis can be similarly priced depending on condition.
Recommended Alternatives:
In terms of Performance, the QX56's 340-hp 5.6L V8 was a strong contender, often out-powering the Navigator's 300-hp 5.4L V8 and surpassing the Lexus LX 470's 235-hp 4.7L V8. It was competitive with GM's offerings like the Escalade's 6.0L V8 (345 hp), offering robust acceleration and impressive towing capacity for its class.
Features were a QX56 strong point. It came remarkably well-equipped as standard, including navigation, a rearview camera, and a premium Bose sound system—features that were often optional or not as advanced in some rivals. The Escalade and Navigator offered similar luxury, though sometimes with more flashy styling or unique options. The Lexus LX 470 was known for its impeccable build quality and off-road prowess but felt less "tech-forward" than the Infiniti.
Reliability is where the QX56 faces its toughest comparison. While fundamentally robust, its known issues like timing chain guide wear, potential radiator/transmission cooler failure, and air suspension problems made it potentially less reliable and more costly to maintain than a Lexus LX 470, which is legendary for its bulletproof durability. GM's SUVs also have common issues (e.g., active suspension, electronics), but parts and labor might be more readily available and less expensive. The Navigator had its own set of powertrain concerns.
Regarding Price (Used), the QX56, like most older luxury SUVs, has depreciated significantly. It typically offers excellent bang for the buck, often found at lower prices than a comparable LX 470, which retains its value exceptionally well. Escalades and Denalis can be similarly priced depending on condition.
Recommended Alternatives:
- Lexus LX 470 (or Toyota Land Cruiser): If paramount reliability, lower long-term repair risk, and exceptional build quality are your priorities, even with less power and older tech.
- GMC Yukon Denali / Chevrolet Tahoe LTZ: For similar full-size SUV capability, strong V8 power, and potentially lower repair costs due to broader parts availability and mechanic familiarity, especially if you can find one without air suspension.
- Later first-generation Infiniti QX56 (e.g., 2007-2010): Some radiator issues were addressed in later model years, potentially reducing one major failure risk.
Final Verdict: Is the 2005 Infiniti QX56 a Good Sport Utility Vehicle?
The 2005 Infiniti QX56 is ideal for buyers seeking a powerful, spacious, and well-appointed luxury SUV for a fraction of its original price. It suits large families, those needing significant towing capacity, or anyone desiring a commanding road presence with comfortable amenities. While it offers immense value as a used vehicle, its worthiness depends heavily on specific conditions.
It's worth buying used only, but a thorough pre-purchase inspection (PPI) by an Infiniti-savvy mechanic is absolutely non-negotiable. This inspection must specifically check for timing chain guide noise, confirm the radiator/transmission cooler has been addressed or replaced, and assess the condition of the air suspension and dashboard. Owners must be prepared to budget for potentially significant repairs, as common issues like the timing chain or air suspension can be costly. If these major concerns are absent or have been professionally rectified, and you're willing to manage its poor fuel economy, the QX56 can provide luxurious and capable transportation for many more miles. Avoid examples with undocumented maintenance or unresolved mechanical problems.
It's worth buying used only, but a thorough pre-purchase inspection (PPI) by an Infiniti-savvy mechanic is absolutely non-negotiable. This inspection must specifically check for timing chain guide noise, confirm the radiator/transmission cooler has been addressed or replaced, and assess the condition of the air suspension and dashboard. Owners must be prepared to budget for potentially significant repairs, as common issues like the timing chain or air suspension can be costly. If these major concerns are absent or have been professionally rectified, and you're willing to manage its poor fuel economy, the QX56 can provide luxurious and capable transportation for many more miles. Avoid examples with undocumented maintenance or unresolved mechanical problems.
Cathleen V
Cathleen is an exceptional freelance writer covering hot topics in the automotive world from a gearhead's perspective. Her articles delve into various aspects of automotive technology and history, offering readers detailed insights into engine performance, reliability, and maintenance. Through her engaging and informative writing, Cathleen provides valuable information to automotive enthusiasts and consumers alike, helping them make informed decisions about vehicle maintenance and purchases.