The 2004 Pontiac Bonneville was a full-size sedan produced by Pontiac from 1957 to 2005. For 2004, it continued as a large, comfortable, and powerful American sedan. Key trims included the SE, SLE, and the performance-oriented GXP. Its popularity stemmed from its spacious interior, smooth ride, and V6 or V8 engine options, offering a blend of luxury and muscle car spirit at a competitive price point.
The Good
The 2004 Bonneville offered a comfortable, quiet ride and robust V6/V8 power for confident highway cruising. Its substantial size provided ample passenger space, while its value proposition was strong, offering a lot of car for the money, appealing to those seeking both comfort and a touch of performance.
The Bad
Owners should be aware of potential issues with the transmission, particularly shifting problems. Cooling system leaks, such as radiator and water pump failures, are also common. Interior wear and tear, especially on seats and electronics, can be a concern, as can rust on the body panels.
2004 Pontiac Bonneville: Quick Overview
- Engine Options:
- 3.8L V6 (L36)
- 3.8L Supercharged V6 (L67) (GXP trim)
- 4.6L V8 (Northstar) (GXP trim, optional on SLE) - Horsepower:
- 3.8L V6: 205 hp
- 3.8L Supercharged V6: 235 hp
- 4.6L V8: 275 hp - Fuel Economy (EPA Estimates):
- 3.8L V6: Approximately 18 mpg city / 28 mpg highway
- 3.8L Supercharged V6: Approximately 17 mpg city / 25 mpg highway
- 4.6L V8: Approximately 17 mpg city / 25 mpg highway - 0-60 Times:
- 3.8L V6: Around 8-9 seconds
- 3.8L Supercharged V6: Around 7-8 seconds
- 4.6L V8: Around 6.5-7.5 seconds
(Note: These are approximate and can vary) - Towing Capacity: Not typically advertised or recommended for significant towing due to its front-wheel-drive platform and focus on comfort.
- Trim-Level Features:
SE: Standard features often included power windows, locks, mirrors, air conditioning, cruise control, a 6-speaker audio system, and comfortable cloth upholstery.
SLE: Added features over the SE typically included dual-zone climate control, upgraded cloth or optional leather seating, a power driver's seat, steering wheel audio controls, and a premium sound system.
GXP: This performance-oriented trim featured the supercharged V6 or V8 engine, sport-tuned suspension, unique exterior/interior styling cues, larger wheels, and often included most of the SLE's luxury features as standard.
2004 Pontiac Bonneville Specifications
Vehicle Information
| Year | 2004 |
| Make | Pontiac |
| Model | Bonneville |
| Trim | - |
| Style | - |
| Type | Sedan |
| Category | Large Car |
Manufacturing Details
| Made In | United States |
| Manufacturing City | WILMINGTON |
Dimensions
| Doors | 4-Door |
| Curb Weight | 3633 pounds |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | LD8 |
| Engine Size | 3.8L |
| Engine Cylinders | 6 |
| Transmission | 4-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 4-Speed |
| Drivetrain | Front-Wheel Drive |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $27,185 |
| Invoice Price | $24,874 |
| Delivery Charges | $725 |
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What Problems Does the 2004 Pontiac Bonneville Have?
The 2004 Pontiac Bonneville, like many vehicles of its era, has some commonly reported issues that potential buyers should be aware of. One of the most frequently cited problems revolves around the transmission. Owners have reported instances of rough shifting, delayed engagement, and outright transmission failure, particularly on models with higher mileage. This can be a costly repair.
The cooling system is another area of concern. Leaks from the radiator, water pump, and coolant hoses are not uncommon. Overheating due to these leaks can lead to more significant engine damage if not addressed promptly. Premature failure of the intake manifold gaskets has also been reported, leading to coolant leaks and potential engine misfires.
On the electrical front, some owners have experienced issues with the power windows and locks, as well as problems with the instrument cluster, leading to non-functioning gauges. The fuel pump is another component that can fail over time.
While there haven't been widespread, catastrophic recalls specifically targeting major mechanical failures for the 2004 model year, it's always advisable to check for any open recalls with the NHTSA. Long-term reliability can be variable; well-maintained Bonnevilles can still serve their owners reliably, but those that have been neglected are more prone to these common issues. The age of the vehicle means that rubber components and seals are more likely to degrade, contributing to leaks and other problems. Specific model year variations in terms of these issues are less pronounced for the 2004 model compared to earlier generations, with most problems being consistent across the later years of the Bonneville's production.
The cooling system is another area of concern. Leaks from the radiator, water pump, and coolant hoses are not uncommon. Overheating due to these leaks can lead to more significant engine damage if not addressed promptly. Premature failure of the intake manifold gaskets has also been reported, leading to coolant leaks and potential engine misfires.
On the electrical front, some owners have experienced issues with the power windows and locks, as well as problems with the instrument cluster, leading to non-functioning gauges. The fuel pump is another component that can fail over time.
While there haven't been widespread, catastrophic recalls specifically targeting major mechanical failures for the 2004 model year, it's always advisable to check for any open recalls with the NHTSA. Long-term reliability can be variable; well-maintained Bonnevilles can still serve their owners reliably, but those that have been neglected are more prone to these common issues. The age of the vehicle means that rubber components and seals are more likely to degrade, contributing to leaks and other problems. Specific model year variations in terms of these issues are less pronounced for the 2004 model compared to earlier generations, with most problems being consistent across the later years of the Bonneville's production.
How long will the 2004 Pontiac Bonneville last?
With proper and consistent maintenance, a 2004 Pontiac Bonneville can realistically be expected to last between 150,000 to 200,000 miles, and in some cases, even exceed 250,000 miles. This longevity is attributed to its robust V6 and V8 engine options. However, neglect significantly shortens its lifespan. Regular oil changes, transmission fluid flushes, and addressing cooling system issues promptly are crucial. While the powertrain can be durable, the susceptibility to transmission problems and cooling system leaks are its primary long-term weaknesses that can shorten its service life if not diligently managed.
What Technology & Safety Features are Included?
The 2004 Pontiac Bonneville offered a decent array of technology and safety features for its time, aiming to provide a comfortable and secure driving experience. Standard entertainment typically included an AM/FM stereo with a CD player and six speakers. Higher trims, like the SLE and GXP, often offered an upgraded Monsoon premium audio system with more speakers, providing a richer sound.
In terms of comfort and convenience technology, features like power-adjustable front seats, dual-zone automatic climate control, and remote keyless entry were available, especially on the SLE and GXP models. Some models also featured a driver information center that displayed trip computer data, fuel economy, and tire pressure.
Driver-assistance features were somewhat limited by modern standards. However, it did come equipped with standard anti-lock brakes (ABS) and traction control, particularly on the higher trims, to aid in maintaining control during hard braking or slippery conditions.
Safety was a priority, with standard dual front airbags and front side-impact airbags. Seatbelt pretensioners were also standard. For improved rearward visibility and to mitigate blind spots, some models featured auto-dimming rearview mirrors. While specific NHTSA crash test ratings for the 2004 model year are not as granularly detailed as modern tests, earlier models of the Bonneville generally performed well in frontal and side-impact crash tests, often receiving four out of five stars in relevant categories.
Optional features could include leather upholstery, heated front seats, a power sunroof, and an anti-theft system. While advanced driver-assistance systems like adaptive cruise control or lane departure warnings were not available, the 2004 Bonneville focused on core safety and convenience features that were expected in a large, premium sedan of its era.
In terms of comfort and convenience technology, features like power-adjustable front seats, dual-zone automatic climate control, and remote keyless entry were available, especially on the SLE and GXP models. Some models also featured a driver information center that displayed trip computer data, fuel economy, and tire pressure.
Driver-assistance features were somewhat limited by modern standards. However, it did come equipped with standard anti-lock brakes (ABS) and traction control, particularly on the higher trims, to aid in maintaining control during hard braking or slippery conditions.
Safety was a priority, with standard dual front airbags and front side-impact airbags. Seatbelt pretensioners were also standard. For improved rearward visibility and to mitigate blind spots, some models featured auto-dimming rearview mirrors. While specific NHTSA crash test ratings for the 2004 model year are not as granularly detailed as modern tests, earlier models of the Bonneville generally performed well in frontal and side-impact crash tests, often receiving four out of five stars in relevant categories.
Optional features could include leather upholstery, heated front seats, a power sunroof, and an anti-theft system. While advanced driver-assistance systems like adaptive cruise control or lane departure warnings were not available, the 2004 Bonneville focused on core safety and convenience features that were expected in a large, premium sedan of its era.
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.
2004 Pontiac Bonneville Prices and Market Value
When new, the 2004 Pontiac Bonneville had an MSRP that typically ranged from around $25,000 for the base SE trim to upwards of $35,000 for the fully-equipped GXP model. The Bonneville, like most domestic sedans of its class, experienced significant depreciation in its early years. Currently, the used market prices for a 2004 Pontiac Bonneville are quite affordable, often falling between $2,000 and $5,000, depending heavily on condition, mileage, and trim level. Factors significantly affecting resale value include maintenance history, the presence of rust, transmission health, and overall cosmetic appearance. Well-maintained examples with lower mileage can command a slightly higher price, but it remains a budget-friendly used car option.
2004 Pontiac Bonneville Cost of Ownership
The 2004 Pontiac Bonneville is generally economical to own, especially on the used market. Insurance costs are typically moderate for a vehicle of its size and age. Fuel costs will vary based on engine choice, with the V6 being more efficient than the V8, but overall, expect costs to be in the average range for a full-size sedan. Routine maintenance is reasonable, with parts generally being readily available. However, potential repair costs, particularly for transmission issues or significant cooling system problems, can be substantial, making proactive maintenance crucial to keeping long-term ownership costs manageable.
2004 Pontiac Bonneville Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
18 gallons
City Mileage
18 miles/gallon
Highway Mileage
27 miles/gallon
2004 Pontiac Bonneville Safety Rating
NHTSA
IIHS
2004 Pontiac Bonneville Insurance
Insurance for a 2004 Pontiac Bonneville is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2004 Pontiac Bonneville Compare to Other Sedan?
The 2004 Pontiac Bonneville competed in the large sedan segment against rivals such as the Toyota Avalon, Ford Crown Victoria/Grand Marquis, and Buick LeSabre. In terms of performance, the Bonneville, especially in its GXP trim with the supercharged V6 or V8, offered a more engaging driving experience and potent acceleration compared to the more comfort-oriented Avalon or the V8-powered but less refined Crown Vic. The Buick LeSabre was a close cousin, sharing many mechanical components and offering a similar focus on comfort and a smooth ride.
Features-wise, the Bonneville generally kept pace with its contemporaries, offering available leather, premium audio, and climate control. However, some Japanese rivals like the Avalon might have offered slightly more advanced technology or superior interior materials for the price point. Reliability is where the Bonneville often lagged behind segment leaders. While the Ford Panther platform (Crown Vic/Grand Marquis) was known for its rugged durability, and the Toyota Avalon for its exceptional dependability, the Bonneville had a reputation for more frequent transmission and cooling system issues.
Price-wise, the Bonneville was often positioned competitively, offering a strong value proposition for buyers seeking American power and size.
Alternatives:
Features-wise, the Bonneville generally kept pace with its contemporaries, offering available leather, premium audio, and climate control. However, some Japanese rivals like the Avalon might have offered slightly more advanced technology or superior interior materials for the price point. Reliability is where the Bonneville often lagged behind segment leaders. While the Ford Panther platform (Crown Vic/Grand Marquis) was known for its rugged durability, and the Toyota Avalon for its exceptional dependability, the Bonneville had a reputation for more frequent transmission and cooling system issues.
Price-wise, the Bonneville was often positioned competitively, offering a strong value proposition for buyers seeking American power and size.
Alternatives:
- For superior reliability and refinement: 2004 Toyota Avalon. It offers a smoother ride, more upscale interior, and significantly better long-term reliability, though it generally commands a higher used price and offers less outright performance than the GXP Bonneville.
- For robust durability and RWD: 2004 Ford Crown Victoria or Mercury Grand Marquis. These offer excellent reliability, a traditional V8 powertrain, and rear-wheel drive, making them great for towing or rougher conditions, but they lack the Bonneville's more modern styling and front-wheel-drive handling.
- For a very similar experience: 2004 Buick LeSabre. It shares many mechanicals with the Bonneville but is generally considered even more comfort-focused and less sporty.
Final Verdict: Is the 2004 Pontiac Bonneville a Good Sedan?
The 2004 Pontiac Bonneville is ideal for budget-conscious buyers seeking a spacious, comfortable, and powerful American sedan for highway cruising or daily commuting, who are willing to accept potential maintenance needs. It is worth buying primarily on the used market, provided it has been meticulously maintained and thoroughly inspected. Specific trims like the GXP offer exciting performance for the price, but the SE and SLE provide a more traditional comfortable large sedan experience with potentially fewer performance-related issues. If a buyer prioritizes ultimate reliability over spirited performance or luxury features, other options in the class might be more suitable. However, for those who value American muscle car heritage and a smooth, quiet ride at an affordable price, the Bonneville can be a solid choice with careful selection and ongoing maintenance.
Eugene S
Eugene is an automotive enthusiast with over 15 years of experience in the used car market. As a writer at VINCheck.info, he brings deep industry insight and a passion for cars, helping readers make smart, informed decisions. Eugene has written hundreds of used car reviews and is known for breaking down complex automotive topics into clear, actionable advice. Over the years, he has driven and worked on a wide range of vehicles—starting with tuning street cars in his early days and eventually focusing on performance upgrades and reliability improvements. Today, he specializes in evaluating used vehicles through the lens of real-world ownership and enthusiast needs. A longtime fan of Porsche, Eugene especially appreciates vehicles that blend durability with driving enjoyment.