The 2004 Infiniti M45, part of the first generation of the M-series sedan, was introduced as a luxury executive car aimed at competing with established European and American rivals. This rear-wheel-drive sedan was built on the Nissan F-Alpha platform, sharing its underpinnings with the Nissan Fuga. Available primarily in a single, well-equipped trim, its model years spanned from 2003 to 2005. The M45 stood out for its potent V8 engine, upscale interior, and a more aggressive styling than some of its more conservative competitors, offering a compelling blend of performance and luxury for its era.
The Good
The 2004 M45 excels with its powerful V8 engine, delivering exhilarating performance for driving enthusiasts. Its refined, comfortable interior caters to those seeking a premium experience, while its understated yet sophisticated design appeals to buyers who appreciate subtle luxury. Practically, it offers a solid value proposition for a V8-powered luxury sedan.
The Bad
Owners of the 2004 Infiniti M45 should be aware of potential issues with the transmission, particularly concerning fluid leaks or premature wear. Suspension components, such as ball joints and control arms, can also require attention due to age and mileage. Fuel economy is another area where this V8 sedan is not a strong performer.
2004 Infiniti M45: Quick Overview
- Engine Options: The 2004 Infiniti M45 featured a single, potent engine option: a 4.5-liter V8.
- Engine Code: VK45DE
- Horsepower: This V8 engine produced approximately 340 horsepower at 6,200 rpm.
- Torque: It delivered around 333 lb-ft of torque at 3,600 rpm.
- Fuel Economy:
- EPA estimates for the 2004 M45 were typically around 15 mpg city and 20 mpg highway.
This translates to a combined fuel economy of roughly 17 mpg.
- EPA estimates for the 2004 M45 were typically around 15 mpg city and 20 mpg highway.
- 0-60 Times: While official figures varied slightly, the M45 was capable of accelerating from 0 to 60 mph in the mid-to-high 5-second range, making it a quick performer for its class and time.
- Towing Capacity: The 2004 Infiniti M45 was not designed or equipped for towing. Towing capacity is generally considered to be N/A (Not Applicable).
- Key Trim-Level Features: The 2004 M45 was offered in a single, highly-equipped trim level, meaning most luxury and convenience features were standard. These often included:
- Leather upholstery
- Power-adjustable front seats with driver's memory
- Heated front seats
- Bose premium audio system
- Navigation system (often optional or part of a package)
- Sunroof
- Xenon headlights
- Dual-zone automatic climate control
- Keyless entry and ignition
- 17-inch alloy wheels
2004 Infiniti M45 Specifications
Vehicle Information
| Year | 2004 |
| Make | Infiniti |
| Model | M45 |
| Trim | - |
| Style | - |
| Type | Sedan |
| Category | Mid-Size Car |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | TOCHIGI |
Dimensions
| Doors | 4-Door |
| Curb Weight | 3851 pounds |
| Gross Vehicle Weight Rating | 4830 pounds |
| Overall Height | 57.60 inches |
| Overall Length | 197.20 inches |
| Overall Width | 69.70 inches |
| Wheelbase Length | 110.20 inches |
| Standard Seating | 5 |
Engine & Performance
| Engine | 4.5L V8 |
| Engine Size | 4.5L |
| 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) | $43,250 |
| Invoice Price | $39,747 |
| Delivery Charges | $590 |
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What Problems Does the 2004 Infiniti M45 Have?
The 2004 Infiniti M45, while generally a robust vehicle, has a few frequently reported issues that potential buyers should be aware of. One of the most consistently cited concerns is related to the transmission. Some owners have experienced premature wear, harsh shifting, or even complete failure, often attributed to leaks or a lack of timely maintenance. It's crucial for any buyer to have the transmission thoroughly inspected.
Another area that can require attention over time is the suspension system. Components such as ball joints, control arm bushings, and tie rod ends can wear out, leading to clunking noises, uneven tire wear, and compromised handling. These are common wear-and-tear items on vehicles of this age and mileage, but their replacement can be costly.
The electronic throttle control (ETC) system has also been a point of concern for some M45 owners, potentially leading to erratic engine performance or warning lights. While not as prevalent as transmission issues, it's a known fault.
Regarding recalls, for the 2004 model year, Infiniti did issue a recall concerning the occupant classification system's front passenger seat sensor, which could malfunction and lead to incorrect airbag deployment. It's important to verify if this recall has been addressed on any specific vehicle.
Long-term reliability can be good if the vehicle has been meticulously maintained. However, the complexity of the V8 engine and the luxury features mean that repairs, when needed, can be more expensive than on less premium vehicles. Issues with the infotainment system, such as navigation screen failures or audio problems, can also arise as the car ages. While there aren't specific widespread issues tied to the 2004 model year over others in its generation, consistent maintenance is the key to mitigating most potential problems.
Another area that can require attention over time is the suspension system. Components such as ball joints, control arm bushings, and tie rod ends can wear out, leading to clunking noises, uneven tire wear, and compromised handling. These are common wear-and-tear items on vehicles of this age and mileage, but their replacement can be costly.
The electronic throttle control (ETC) system has also been a point of concern for some M45 owners, potentially leading to erratic engine performance or warning lights. While not as prevalent as transmission issues, it's a known fault.
Regarding recalls, for the 2004 model year, Infiniti did issue a recall concerning the occupant classification system's front passenger seat sensor, which could malfunction and lead to incorrect airbag deployment. It's important to verify if this recall has been addressed on any specific vehicle.
Long-term reliability can be good if the vehicle has been meticulously maintained. However, the complexity of the V8 engine and the luxury features mean that repairs, when needed, can be more expensive than on less premium vehicles. Issues with the infotainment system, such as navigation screen failures or audio problems, can also arise as the car ages. While there aren't specific widespread issues tied to the 2004 model year over others in its generation, consistent maintenance is the key to mitigating most potential problems.
How long will the 2004 Infiniti M45 last?
Based on owner data and typical maintenance habits, a well-maintained 2004 Infiniti M45 can reasonably be expected to serve for 150,000 to 200,000 miles, or potentially more. The V8 engine itself is known for its durability and can last well beyond these figures if oil changes and other routine services are performed diligently. However, long-term durability is heavily influenced by how the vehicle has been treated. Weaknesses that tend to emerge over time include wear in the suspension components, potential transmission issues (as mentioned previously), and the aging of various electronic modules and sensors. Owners who prioritize preventative maintenance, addressing minor issues before they become major problems, will undoubtedly see a longer service life from their M45. Those with neglected maintenance histories may encounter more significant and costly repairs sooner.
What Technology & Safety Features are Included?
The 2004 Infiniti M45 offered a competitive suite of technology and safety features for its time, aiming to provide a luxurious and secure experience.
Technology and Entertainment: Standard equipment typically included a premium Bose audio system with an in-dash CD player. Many models were also equipped with a touch-screen navigation system, which was quite advanced for 2004. Dual-zone automatic climate control was standard, ensuring comfort for both front occupants. Other convenience features included power-adjustable front seats with memory for the driver, keyless entry and ignition, and a power sunroof. Steering wheel-mounted controls for audio and cruise control were also present.
Driver-Assistance Features: Advanced driver-assistance features were not as prevalent as they are today. The M45 did offer rear parking sensors on some models, which aided in low-speed maneuvering. Traction control and stability control systems were also standard, helping to maintain control in slippery conditions.
Safety Features: Safety was a priority for the M45. It came standard with front-seat airbags, front-seat side-impact airbags, and roof-mounted side-curtain airbags for enhanced head protection. Anti-lock brakes (ABS) were also standard, helping the driver maintain steering control during emergency braking.
Optional Features: Optional packages could further enhance the M45's offerings. These might include a rear-seat DVD entertainment system, heated rear seats, or an upgraded audio system.
Crash-Test Ratings: While specific ratings from organizations like the IIHS or NHTSA for the 2004 M45 might be scarce due to its niche market and age, vehicles in this class from Infiniti generally performed well in crash tests of their era, with strong structures and comprehensive airbag systems contributing to occupant protection. It's always advisable to check the latest available safety reports or consumer reviews for specific crashworthiness data.
Technology and Entertainment: Standard equipment typically included a premium Bose audio system with an in-dash CD player. Many models were also equipped with a touch-screen navigation system, which was quite advanced for 2004. Dual-zone automatic climate control was standard, ensuring comfort for both front occupants. Other convenience features included power-adjustable front seats with memory for the driver, keyless entry and ignition, and a power sunroof. Steering wheel-mounted controls for audio and cruise control were also present.
Driver-Assistance Features: Advanced driver-assistance features were not as prevalent as they are today. The M45 did offer rear parking sensors on some models, which aided in low-speed maneuvering. Traction control and stability control systems were also standard, helping to maintain control in slippery conditions.
Safety Features: Safety was a priority for the M45. It came standard with front-seat airbags, front-seat side-impact airbags, and roof-mounted side-curtain airbags for enhanced head protection. Anti-lock brakes (ABS) were also standard, helping the driver maintain steering control during emergency braking.
Optional Features: Optional packages could further enhance the M45's offerings. These might include a rear-seat DVD entertainment system, heated rear seats, or an upgraded audio system.
Crash-Test Ratings: While specific ratings from organizations like the IIHS or NHTSA for the 2004 M45 might be scarce due to its niche market and age, vehicles in this class from Infiniti generally performed well in crash tests of their era, with strong structures and comprehensive airbag systems contributing to occupant protection. It's always advisable to check the latest available safety reports or consumer reviews for specific crashworthiness data.
What Colors Options are Available?
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2004 Infiniti M45 Prices and Market Value
When new, the 2004 Infiniti M45 had an MSRP that typically ranged from around $48,000 to $52,000, depending on optional packages. As a luxury sedan with a V8 engine, it was priced competitively within its segment.
Currently, the used market price for a 2004 M45 varies significantly based on mileage, condition, and location, but generally falls between $3,000 and $8,000. This represents substantial depreciation from its original price, which is typical for luxury vehicles.
Factors affecting its resale value include maintenance history, the presence of luxury options like navigation, and overall condition. Vehicles with lower mileage and a documented service record will command higher prices. Conversely, those with high mileage or known mechanical issues will be at the lower end of the spectrum. Its V8 performance remains a selling point, but its fuel economy and aging technology can deter some buyers.
Currently, the used market price for a 2004 M45 varies significantly based on mileage, condition, and location, but generally falls between $3,000 and $8,000. This represents substantial depreciation from its original price, which is typical for luxury vehicles.
Factors affecting its resale value include maintenance history, the presence of luxury options like navigation, and overall condition. Vehicles with lower mileage and a documented service record will command higher prices. Conversely, those with high mileage or known mechanical issues will be at the lower end of the spectrum. Its V8 performance remains a selling point, but its fuel economy and aging technology can deter some buyers.
2004 Infiniti M45 Cost of Ownership
Owning a 2004 Infiniti M45 is generally considered moderately costly. Insurance premiums can be higher than average due to its luxury status and V8 engine. Fuel costs are a significant factor; its V8 engine delivers V8 performance but at a price, with relatively poor fuel economy. Maintenance, while not exorbitant for routine items, can become expensive for specialized repairs, especially concerning the transmission or electronic components. Repair costs for parts specific to this luxury model will also be higher than for mainstream vehicles. Overall, the M45 is not an economical car to own, but for those who appreciate its performance and luxury, the costs are often accepted as part of the ownership experience.
2004 Infiniti M45 Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
21.10 gallons
City Mileage
17 miles/gallon
Highway Mileage
23 miles/gallon
2004 Infiniti M45 Safety Rating
NHTSA
IIHS
2004 Infiniti M45 Recalls & Defects
Fuel System, Gasoline
Recall date
2012-03-06
Recall no.
12v088000
Source
NHTSA
Summary
Nissan IS Recalling Certain Model Year 2003-2004 Infiniti M45 Vehicles Manufactured From March 7, 2002, Through June 3, 2004. DUE TO A Circuit Board Failure, THE Fuel Gauge MAY Read A Fuel Level Higher Than Actually Exists. AS A Result, THE Vehicle MAY RUN OUT OF GAS Without Notice.
Consequence
THE Vehicle MAY Stall Without Warning, Increasing THE Risk OF A Crash.
Remedy
Nissan Will Notify Owners, and Dealers Will Modify THE Circuit Board Free OF Charge. THE Safety Recall Began ON April 27, 2012. Owners MAY Contact Nissan Customer Service AT 1-800-647-7261.
Notes
Customers MAY Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty: 1-800-424-9153); or GO TO Http://Www.safercar.gov.
Exterior Lighting:brake Lights:switch
Recall date
2004-10-13
Recall no.
04v497000
Source
NHTSA
Summary
ON Certain Passenger Vehicles, THE Brake Lamp Switch MAY Malfunction.
Consequence
IF This Occurs, THE Brake Lights Will NOT Illuminate When THE Brake IS Applied, Which Could Result IN A Crash.
Remedy
Dealers Will Replace THE Brake Lamp Switch. THE Recall Began ON October 25, 2004. Owners Should Contact Infiniti AT 1-800-662-6200.
Notes
Nissan Recall NO. R0407.customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
2004 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
2004 Infiniti M45 Insurance
Insurance for a 2004 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 2004 Infiniti M45 Compare to Other Sedan?
The 2004 Infiniti M45 competed in the luxury sedan segment against formidable rivals such as the BMW 5 Series (E60 generation), Mercedes-Benz E-Class (W211 generation), Lexus GS, and Audi A6.
Performance: The M45's 340-horsepower V8 engine was a significant advantage, often outperforming its primary competitors in straight-line acceleration, especially the more comfort-oriented models. While BMW offered powerful engines, the M45 provided accessible V8 grunt.
Features: Infiniti equipped the M45 generously, often including features like leather, premium audio, and navigation as standard or in well-appointed packages. In terms of pure luxury and cutting-edge tech for its time, the German rivals might have had a slight edge in refinement and available options (like adaptive cruise control or more advanced suspension systems), but the M45 was never far behind. The Lexus GS offered a similar blend of luxury and reliability.
Reliability: This is where the M45 often shines compared to some of its European rivals, particularly the BMW 5 Series and Mercedes-Benz E-Class of that era, which were known for more complex and sometimes costly electronic and mechanical issues as they aged. Lexus has a strong reputation for reliability, and the GS is a strong contender in this regard. While the M45 has its own potential weak spots (transmission, suspension), it generally holds up well with proper maintenance.
Price: The M45 typically offered a more attractive price point on the used market compared to similarly equipped BMW or Mercedes-Benz models, providing a strong value proposition for a V8 luxury sedan.
Alternatives:
- Similar: The Lexus GS 430 (2001-2005) offers comparable V8 performance, a luxurious interior, and superior long-term reliability, making it a strong alternative.
- Better (if budget allows): A slightly newer model like a 2006+ Infiniti M45 (Y50 generation) or a 2006+ Lexus GS 350/430 would offer more modern technology and potentially improved reliability. For those prioritizing ultimate driving dynamics, a BMW 545i would be a performance choice, though potentially with higher maintenance costs.
- Economical Alternative: If V8 power isn't essential, a well-equipped Acura TL from the same era could offer a good balance of luxury, performance, and reliability at a lower price point.
Performance: The M45's 340-horsepower V8 engine was a significant advantage, often outperforming its primary competitors in straight-line acceleration, especially the more comfort-oriented models. While BMW offered powerful engines, the M45 provided accessible V8 grunt.
Features: Infiniti equipped the M45 generously, often including features like leather, premium audio, and navigation as standard or in well-appointed packages. In terms of pure luxury and cutting-edge tech for its time, the German rivals might have had a slight edge in refinement and available options (like adaptive cruise control or more advanced suspension systems), but the M45 was never far behind. The Lexus GS offered a similar blend of luxury and reliability.
Reliability: This is where the M45 often shines compared to some of its European rivals, particularly the BMW 5 Series and Mercedes-Benz E-Class of that era, which were known for more complex and sometimes costly electronic and mechanical issues as they aged. Lexus has a strong reputation for reliability, and the GS is a strong contender in this regard. While the M45 has its own potential weak spots (transmission, suspension), it generally holds up well with proper maintenance.
Price: The M45 typically offered a more attractive price point on the used market compared to similarly equipped BMW or Mercedes-Benz models, providing a strong value proposition for a V8 luxury sedan.
Alternatives:
- Similar: The Lexus GS 430 (2001-2005) offers comparable V8 performance, a luxurious interior, and superior long-term reliability, making it a strong alternative.
- Better (if budget allows): A slightly newer model like a 2006+ Infiniti M45 (Y50 generation) or a 2006+ Lexus GS 350/430 would offer more modern technology and potentially improved reliability. For those prioritizing ultimate driving dynamics, a BMW 545i would be a performance choice, though potentially with higher maintenance costs.
- Economical Alternative: If V8 power isn't essential, a well-equipped Acura TL from the same era could offer a good balance of luxury, performance, and reliability at a lower price point.
Final Verdict: Is the 2004 Infiniti M45 a Good Sedan?
The 2004 Infiniti M45 is ideal for the discerning buyer seeking potent V8 performance and a comfortable, upscale driving experience without the premium price tag of its European counterparts, especially on the used market. It's a great choice for those who prioritize acceleration and a smooth ride over razor-sharp handling or cutting-edge technology.
It is definitely worth considering as a used vehicle, particularly for its strong value proposition. However, it's crucial to buy under specific conditions: prioritize well-maintained examples with documented service history, and factor in potential costs for common repairs like transmission work or suspension components. The single, well-equipped trim makes shopping simpler. Avoid it if you're on a very tight budget for repairs or demand hyper-reliability, but for a performance-oriented luxury sedan that offers a lot of bang for your buck, the 2004 M45 remains a compelling option.
It is definitely worth considering as a used vehicle, particularly for its strong value proposition. However, it's crucial to buy under specific conditions: prioritize well-maintained examples with documented service history, and factor in potential costs for common repairs like transmission work or suspension components. The single, well-equipped trim makes shopping simpler. Avoid it if you're on a very tight budget for repairs or demand hyper-reliability, but for a performance-oriented luxury sedan that offers a lot of bang for your buck, the 2004 M45 remains a compelling option.
Drew B
Drew is a seasoned automotive expert and contributor to VinCheck.info. With nearly 15 years of experience as a former Porsche technician, he brings a wealth of hands-on knowledge to his writing. Born in North Carolina, a region renowned for its deep-rooted NASCAR culture, Drew developed a passion for cars early in life, often building and working on vehicles from a young age. At VINCheck, Drew leverages his extensive technical background to provide in-depth analyses of various vehicles. His articles often focus on engine performance, reliability, and maintenance insights, offering readers practical information grounded in real-world experience. Some of his notable contributions include reviews on the Mazda CX-5's longevity and detailed examinations of engine options for models like the 2011 Toyota Camry and Tacoma