The 2008 Infiniti M45 is a distinguished mid-size luxury sports sedan, part of the third-generation M series (Y50) produced from 2006-2010. It boasts a sleek, executive body style and was available primarily in a single, well-equipped trim level with optional packages. Originally priced around $50,000-$55,000, the M45 stood out for its powerful V8 engine, rear-wheel-drive dynamics, and a strong emphasis on technology and luxury, offering a compelling blend of performance and sophistication that appealed to discerning drivers seeking a more unique alternative to German rivals.
The Good
The 2008 M45 offers thrilling V8 performance and a plush, quiet cabin, appealing to emotional buyers seeking power and luxury. Practical advantages include a distinctive design, a reputation for solid reliability among Japanese luxury cars, and significant value on the used market, providing premium features without the new-car price tag. It's a comfortable cruiser with surprising agility.
The Bad
Potential weaknesses for the 2008 M45 include below-average fuel economy, especially with the V8 engine, and a ride that some might find firm due to its sporty tuning. Common issues to watch out for include worn suspension components, potential for timing chain guide wear on higher mileage examples, and the aging of complex electronic systems.
2008 Infiniti M45: Quick Overview
- Engine Options: The 2008 Infiniti M45 came exclusively with one engine: a 4.5-liter naturally aspirated V8 (VK45DE).
- Horsepower: This V8 engine produced a robust 325 horsepower at 6,400 rpm and 336 lb-ft of torque at 4,000 rpm.
- Transmission: Paired with a 5-speed automatic transmission with manual shift mode.
- Drivetrain: Rear-wheel drive (RWD) was standard.
- Fuel Economy (EPA estimated):
- 16 MPG city
- 21 MPG highway
- 18 MPG combined
- 0-60 MPH Acceleration: Typically estimated in the low to mid 5-second range (around 5.4-5.9 seconds), making it quite quick for its class.
- Towing Capacity: The Infiniti M45 was not officially rated or recommended for towing by Infiniti. It is not designed or marketed for towing purposes.
- Trim-Level Features: The M45 was essentially a single, high-trim model, distinguished by its V8 engine and comprehensive standard features. Key standard features included:
- Leather-appointed seating
- Heated and power-adjustable front seats
- Bose premium audio system with 6-disc CD changer and 8 speakers
- Intelligent Key with push-button ignition
- Dual-zone automatic climate control
- Bi-xenon HID headlights
- 18-inch alloy wheels
- Power moonroof
- Bluetooth hands-free phone system
- Rearview monitor
- Infiniti's Vehicle Dynamic Control (VDC) with Traction Control System (TCS)
Optional Packages:- Technology Package: Included features like Intelligent Cruise Control, Lane Departure Warning, and adaptive front lighting.
- Sport Package: Added sport-tuned suspension, 19-inch alloy wheels, sport seats, and aluminum trim.
- Advanced Technology Package: Further enhanced with features like the hard drive-based navigation system, XM NavTraffic, and a Forest Air system for improved air quality.
2008 Infiniti M45 Specifications
Vehicle Information
| Year | 2008 |
| Make | Infiniti |
| Model | M45 |
| Trim | - |
| Style | - |
| Type | Sedan |
| Category | Large Car |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | CANTON |
Dimensions
| Doors | 4-Door |
| Curb Weight | 4176 pounds |
| Gross Vehicle Weight Rating | - |
| Overall Height | 60.00 inches |
| Overall Length | 192.60 inches |
| Overall Width | 70.80 inches |
| Wheelbase Length | 114.20 inches |
| Standard Seating | 5 |
Engine & Performance
| Engine | 4.5-L V-8 DOHC 32V |
| Engine Size | 4.5L |
| Engine Cylinders | 8 |
| Transmission | 5-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 5-Speed |
| Drivetrain | All-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Rack & Pinion |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $52,750 |
| Invoice Price | $48,455 |
| Delivery Charges | $765 |
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What Problems Does the 2008 Infiniti M45 Have?
While generally considered a reliable vehicle, the 2008 Infiniti M45, like many aging luxury cars, has several frequently reported problems and long-term reliability concerns. One significant issue across the third-generation M (Y50 chassis, including 2008) is related to the timing chain and timing chain guides on the VK45DE V8 engine. Over time and at higher mileages, these components can wear, leading to noise (a "ticking" or "rattling" sound, especially on cold start) and potentially more severe engine damage if not addressed. This is a costly repair.
Another common complaint involves suspension components, particularly bushings and control arms, which can wear out, leading to clunking noises, premature tire wear, and a degraded ride quality. Power steering pump failures and leaks are also reported.
Electronically, issues with the Bluetooth module or the infotainment system's screen flickering or failing are not uncommon, a consequence of aging complex electronics. Some owners have reported issues with the accelerator pedal position sensor (APPS), leading to reduced power or "limp mode."
Regarding recalls, the 2008 Infiniti M45 did have several, though most were minor. For example, there was a recall (NHTSA Campaign Number 08V352000) concerning the driver's side airbag inflator, which could deploy improperly. There was also a campaign (08V291000) related to the passenger airbag sensor, which might not properly detect small adult occupants. Owners should always check if all recall work has been completed for any used vehicle. Overall, while the V8 engine itself is robust, the ancillary systems and timing chain can present expensive maintenance challenges as the car ages, making pre-purchase inspections crucial.
Another common complaint involves suspension components, particularly bushings and control arms, which can wear out, leading to clunking noises, premature tire wear, and a degraded ride quality. Power steering pump failures and leaks are also reported.
Electronically, issues with the Bluetooth module or the infotainment system's screen flickering or failing are not uncommon, a consequence of aging complex electronics. Some owners have reported issues with the accelerator pedal position sensor (APPS), leading to reduced power or "limp mode."
Regarding recalls, the 2008 Infiniti M45 did have several, though most were minor. For example, there was a recall (NHTSA Campaign Number 08V352000) concerning the driver's side airbag inflator, which could deploy improperly. There was also a campaign (08V291000) related to the passenger airbag sensor, which might not properly detect small adult occupants. Owners should always check if all recall work has been completed for any used vehicle. Overall, while the V8 engine itself is robust, the ancillary systems and timing chain can present expensive maintenance challenges as the car ages, making pre-purchase inspections crucial.
How long will the 2008 Infiniti M45 last?
With diligent maintenance, a 2008 Infiniti M45 can reliably serve its owner for 150,000 to 200,000 miles or even beyond 15 years. The VK45DE V8 engine is fundamentally robust, but its longevity is heavily dependent on regular oil changes and addressing specific wear items. Long-term durability is good for the drivetrain and body, but weaknesses often emerge in suspension components (bushings, control arms), leading to steering vagueness and ride degradation. Electrical issues with infotainment or sensors can also surface with age. The infamous timing chain/guide wear, while not universal, is a critical long-term concern that can be very costly. Proper fluid changes for the transmission and differential are also vital for extended service life. Without consistent preventative maintenance, major repairs become more likely past 100,000 miles.
What Technology & Safety Features are Included?
The 2008 Infiniti M45 was a technology showcase for its time, offering a comprehensive suite of features. For entertainment and connectivity, it came standard with a premium Bose audio system featuring 8 speakers and a 6-disc in-dash CD changer, along with a Bluetooth hands-free phone system. An optional hard drive-based navigation system with real-time traffic (XM NavTraffic) was available, integrated into a central display screen. The Infiniti Intelligent Key with push-button ignition was also standard, enhancing convenience.
In terms of driver-assistance and safety features, the M45 was well-equipped. Standard safety includes Vehicle Dynamic Control (VDC) with Traction Control System (TCS), a full complement of airbags (front, side-impact, and side curtain airbags), anti-lock brakes (ABS), Electronic Brake-force Distribution (EBD), and Brake Assist (BA). A rearview monitor was standard, aiding in parking and reversing maneuvers.
Advanced optional driver-assistance technologies for 2008 included:
Regarding crash-test ratings, the 2008 Infiniti M45 generally performed well. The National Highway Traffic Safety Administration (NHTSA) awarded the 2008 Infiniti M sedan (including the M35 and M45) 5 stars for front driver and passenger impact, and 5 stars for front and rear side impact. It received 4 stars for rollover resistance. These strong ratings underscore the M45's robust safety engineering, offering peace of mind to occupants.
In terms of driver-assistance and safety features, the M45 was well-equipped. Standard safety includes Vehicle Dynamic Control (VDC) with Traction Control System (TCS), a full complement of airbags (front, side-impact, and side curtain airbags), anti-lock brakes (ABS), Electronic Brake-force Distribution (EBD), and Brake Assist (BA). A rearview monitor was standard, aiding in parking and reversing maneuvers.
Advanced optional driver-assistance technologies for 2008 included:
- Intelligent Cruise Control (ICC): Uses radar to maintain a set distance from the vehicle ahead.
- Lane Departure Warning (LDW): Alerted the driver if the vehicle drifted out of its lane without signaling.
- Adaptive Front Lighting System (AFS): Pivoted the headlights to illuminate around corners as the steering wheel turned.
- Preview Braking: Part of the Advanced Technology Package, it detected sudden slowing of a vehicle ahead and pre-pressurized the braking system for faster response.
Regarding crash-test ratings, the 2008 Infiniti M45 generally performed well. The National Highway Traffic Safety Administration (NHTSA) awarded the 2008 Infiniti M sedan (including the M35 and M45) 5 stars for front driver and passenger impact, and 5 stars for front and rear side impact. It received 4 stars for rollover resistance. These strong ratings underscore the M45's robust safety engineering, offering peace of mind to occupants.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
2008 Infiniti M45 Prices and Market Value
When new, the 2008 Infiniti M45 had an MSRP generally ranging from approximately $50,000 to $55,000, depending on optional packages. Today, on the used market, prices have depreciated significantly, with well-maintained examples typically selling for anywhere from $5,000 to $10,000, though pristine, low-mileage models might fetch slightly more.
The M45 has experienced substantial depreciation, characteristic of large, luxury sedans, especially those from non-German brands. Factors affecting its resale value include its age, mileage, overall condition, and maintenance history, particularly evidence of addressing common issues like timing chain wear. The relatively high fuel consumption of the V8 engine and the aging of its advanced technology also contribute to lower resale values. While a great used car value, it suffered from rapid depreciation from new.
The M45 has experienced substantial depreciation, characteristic of large, luxury sedans, especially those from non-German brands. Factors affecting its resale value include its age, mileage, overall condition, and maintenance history, particularly evidence of addressing common issues like timing chain wear. The relatively high fuel consumption of the V8 engine and the aging of its advanced technology also contribute to lower resale values. While a great used car value, it suffered from rapid depreciation from new.
2008 Infiniti M45 Cost of Ownership
Owning a 2008 Infiniti M45 can be quite costly. Insurance rates will be moderate to high, reflecting its luxury status and powerful V8 engine. Fuel costs are substantial, with the V8's low MPG demanding premium gasoline. Maintenance, while manageable for routine items, becomes expensive when dealing with dealer-specific parts or labor. Repairs, especially for potential issues like timing chain components or complex electronics, can be very high, easily running into thousands of dollars. As a large luxury V8 sedan, it's definitely not an economical vehicle to own long-term, requiring a significant budget for fuel and potential specialized repairs, making it best for those prepared for higher running costs.
2008 Infiniti M45 Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
20.00 gallons
City Mileage
14 miles/gallon
Highway Mileage
20 miles/gallon
2008 Infiniti M45 Safety Rating
NHTSA
IIHS
2008 Infiniti M45 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
2008 Infiniti M45 Insurance
Insurance for a 2008 Infiniti M45 is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2008 Infiniti M45 Compare to Other Sedan?
The 2008 Infiniti M45 competed in a tough segment dominated by European luxury sedans. Its key rivals included the BMW 550i, Mercedes-Benz E550, Lexus GS 460/430, and Audi A6 4.2.
Performance: The M45's 325hp V8 offered strong acceleration, often matching or slightly exceeding the naturally aspirated V8s of the Lexus GS 430/460. It was generally quicker than the Audi A6 4.2 but a touch behind the more powerful BMW 550i and Mercedes E550. Its rear-wheel-drive dynamics provided a sporty, engaging feel, though some found the steering less communicative than BMW's.
Features: The M45 was feature-rich, often including as standard what rivals offered as expensive options (e.g., leather, premium audio, navigation, rearview camera). Its available advanced safety tech (ICC, LDW) was cutting-edge for the era, putting it on par with, or even ahead of, some competitors. However, its interior design, while luxurious, lacked the sheer aesthetic flair or material quality of a top-tier Mercedes or Audi.
Reliability: Historically, Infiniti often edges out German rivals in long-term reliability surveys. The M45 is generally robust, but its specific V8 timing chain issues and aging electronics can be costly. Lexus GS models typically boast superior long-term reliability with fewer common major mechanical faults, while German competitors (BMW, Mercedes, Audi) often present higher maintenance and repair costs as they age, though they offer superior driving dynamics or interior refinement for some.
Price: When new, the M45 was typically priced slightly below equivalent V8 German offerings, offering a compelling value proposition. On the used market, the M45 depreciates significantly, making it a much more affordable used purchase than any of its European counterparts, and often cheaper than a comparable Lexus GS.
Alternatives:
Performance: The M45's 325hp V8 offered strong acceleration, often matching or slightly exceeding the naturally aspirated V8s of the Lexus GS 430/460. It was generally quicker than the Audi A6 4.2 but a touch behind the more powerful BMW 550i and Mercedes E550. Its rear-wheel-drive dynamics provided a sporty, engaging feel, though some found the steering less communicative than BMW's.
Features: The M45 was feature-rich, often including as standard what rivals offered as expensive options (e.g., leather, premium audio, navigation, rearview camera). Its available advanced safety tech (ICC, LDW) was cutting-edge for the era, putting it on par with, or even ahead of, some competitors. However, its interior design, while luxurious, lacked the sheer aesthetic flair or material quality of a top-tier Mercedes or Audi.
Reliability: Historically, Infiniti often edges out German rivals in long-term reliability surveys. The M45 is generally robust, but its specific V8 timing chain issues and aging electronics can be costly. Lexus GS models typically boast superior long-term reliability with fewer common major mechanical faults, while German competitors (BMW, Mercedes, Audi) often present higher maintenance and repair costs as they age, though they offer superior driving dynamics or interior refinement for some.
Price: When new, the M45 was typically priced slightly below equivalent V8 German offerings, offering a compelling value proposition. On the used market, the M45 depreciates significantly, making it a much more affordable used purchase than any of its European counterparts, and often cheaper than a comparable Lexus GS.
Alternatives:
- For better reliability and lower long-term costs: Consider the Lexus GS 430/460. It offers similar V8 power, exceptional reliability, and a comfortable ride, though perhaps a less sporty feel.
- For a more engaging driving experience (at higher cost): A BMW 550i (E60 generation) offers superior handling and a strong V8, but expect higher maintenance and repair expenses.
- For similar performance and luxury at a good used value: The Infiniti M35 (V6) offers a very similar package, slightly better fuel economy, and avoids the specific V8 timing chain issues, often at an even lower purchase price.
Final Verdict: Is the 2008 Infiniti M45 a Good Sedan?
The 2008 Infiniti M45 is ideal for a specific buyer: someone seeking a powerful, luxurious, and distinctively styled V8 sports sedan on the used market, who values strong performance and features over brand cachet or absolute fuel efficiency. It's a compelling buy for those with a budget of $5,000-$10,000 who understand that luxury car ownership entails higher running costs.
It is definitely worth buying as a used vehicle, but under specific conditions: a thorough pre-purchase inspection is paramount to uncover potential timing chain issues or other significant repairs. Look for examples with documented maintenance history, especially evidence of regular oil changes and any necessary suspension work. Opting for a well-maintained example, regardless of optional packages, is key. It's not for the frugal buyer, but for enthusiasts who appreciate its unique blend of power and luxury without the new car premium.
It is definitely worth buying as a used vehicle, but under specific conditions: a thorough pre-purchase inspection is paramount to uncover potential timing chain issues or other significant repairs. Look for examples with documented maintenance history, especially evidence of regular oil changes and any necessary suspension work. Opting for a well-maintained example, regardless of optional packages, is key. It's not for the frugal buyer, but for enthusiasts who appreciate its unique blend of power and luxury without the new car premium.
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.