The 2005 Porsche 718 Boxster, while blending a historical "718" racing designation with the 987 generation's debut, represents Porsche's revered mid-engine roadster. It's a two-door convertible, initially available in Boxster (base) and Boxster S trims. New pricing ranged from approximately $45,000 to $65,000. It stands out for its sublime mid-engine balance, exceptionally communicative steering, and engaging driving dynamics, making it a benchmark for true driver's cars.
The Good
The 2005 Porsche 718 Boxster offers thrilling performance with its precise handling, iconic design, and intoxicating flat-six engine note, appealing strongly to emotional buyers. Practically, it boasts surprisingly good fuel economy for a sports car, a relatively comfortable ride, and dual trunks for reasonable cargo capacity, delivering exceptional driving value.
The Bad
Key weaknesses for the 2005 Porsche 718 Boxster include known engine issues such as the Intermediate Shaft (IMS) bearing failure and bore scoring, particularly on "S" models. Higher maintenance and repair costs, age-related convertible top mechanism issues, and limited parts availability for some components are also significant considerations for potential owners.
2005 Porsche 718 Boxster: Quick Overview
- Engine Options: The 2005 Porsche 718 Boxster was available with two flat-six engine options:
- 2.7-liter naturally aspirated flat-six (Base model)
- 3.2-liter naturally aspirated flat-six (Boxster S model) - Horsepower:
- 2.7L: 240 hp (179 kW)
- 3.2L S: 280 hp (209 kW) - Fuel Economy (EPA estimates for manual transmission):
- 2.7L: Approx. 20 MPG city / 28 MPG highway
- 3.2L S: Approx. 19 MPG city / 26 MPG highway - 0-60 MPH Times (manufacturer estimates):
- 2.7L: Approximately 5.9 seconds
- 3.2L S: Approximately 5.2 seconds - Towing Capacity: Not applicable; the Porsche Boxster is not designed or rated for towing.
- Trim-Level Features:
- Base 718 Boxster: Standard features included 17-inch alloy wheels, a power-operated soft top, power windows/mirrors, automatic climate control, a CD stereo, and partial leather upholstery. Safety features comprised antilock brakes, stability control (Porsche Stability Management - PSM), and multiple airbags. It typically came with a 5-speed manual transmission.
- 718 Boxster S: Built upon the base model, it added the more powerful 3.2L engine, larger 18-inch alloy wheels, larger red-painted brake calipers, a sportier suspension setup, and a 6-speed manual transmission. The S model also often included or had available more premium options as standard, such as an upgraded audio system, full leather interior, and more advanced seating.
- Common Optional Features: These included a Tiptronic S automatic transmission, Xenon headlamps, Sport Chrono Package, Porsche Communication Management (PCM) with navigation, heated seats, full power seats, leather interior upgrades, and ParkAssist (rear parking sensors).
2005 Porsche 718 Boxster Specifications
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Vehicle History Report
What Problems Does the 2005 Porsche 718 Boxster Have?
The 2005 Porsche 718 Boxster, despite its pedigree, is associated with several well-documented long-term reliability concerns, primarily stemming from its M96/M97 engine series. The most notorious issue is the Intermediate Shaft (IMS) bearing failure. This bearing supports the intermediate shaft that drives the camshafts, and its failure can lead to catastrophic engine damage. While Porsche introduced a revised IMS bearing during the 2005 model year, many early 2005 cars were fitted with the "single row" bearing, considered more susceptible to failure. This is arguably the most critical pre-purchase inspection point for any 2005 Boxster.
Another significant concern, particularly prevalent in the Boxster S's larger 3.2L engine, is bore scoring. This condition involves scoring of the cylinder walls, leading to excessive oil consumption, engine knocking, and eventual engine failure. It is often linked to localized overheating and specific driving habits or oiling issues. A borescope inspection is highly recommended for Boxster S models.
Beyond these major engine maladies, other frequently reported problems include:
Another significant concern, particularly prevalent in the Boxster S's larger 3.2L engine, is bore scoring. This condition involves scoring of the cylinder walls, leading to excessive oil consumption, engine knocking, and eventual engine failure. It is often linked to localized overheating and specific driving habits or oiling issues. A borescope inspection is highly recommended for Boxster S models.
Beyond these major engine maladies, other frequently reported problems include:
- Air/Oil Separator (AOS) Failure: A failed AOS can cause excessive white smoke from the exhaust, a rough idle, and poor engine performance. It's a relatively common wear item.
- Coolant Expansion Tank Leaks: The plastic coolant expansion tanks can become brittle and crack with age, leading to coolant leaks.
- Ignition Coil Packs: These can fail, causing misfires and rough engine running.
- Convertible Top Mechanism: Components like cables, motors, and hydraulic cylinders can wear out over time, leading to issues with the power-operated soft top.
- Radiator Leaks: The radiators, located in the front bumper, are prone to clogging with debris and can eventually corrode and leak.
How long will the 2005 Porsche 718 Boxster last?
With meticulous maintenance and proactive addressing of its known vulnerabilities, a 2005 Porsche 718 Boxster can reliably achieve well over 100,000 to 150,000 miles, providing many years of exhilarating service. Owner data suggests that cars with comprehensive service records and preventative work (like IMS bearing replacement) tend to last significantly longer. Long-term durability of the chassis, body, and high-quality interior materials is generally excellent. However, weaknesses over time predominantly center around the engine's internal components, such as the IMS bearing and bore scoring, and age-related degradation of plastic and rubber components in the cooling system, suspension bushings, and the convertible top mechanism. Neglecting oil changes or using non-specified fluids severely compromises engine longevity. Therefore, longevity is directly tied to the owner's commitment to specialized care and repair budgets.
What Technology & Safety Features are Included?
For a 2005 model year, the Porsche 718 Boxster featured technology that was advanced for its time but is now considered basic by modern standards.
Built-in Tech & Entertainment:
Driver-Assistance Features:
The 2005 Boxster featured limited driver-assistance aids, prioritizing direct driver control.
Safety Features:
Porsche built the Boxster with robust passive safety in mind.
Crash-Test Ratings: Official crash-test ratings from organizations like NHTSA or IIHS are typically not available for low-volume, high-performance sports cars like the Porsche Boxster due to high testing costs and limited sales figures. Porsche, however, conducts extensive in-house safety testing to meet rigorous global safety standards, maintaining a strong reputation for structural integrity and occupant protection.
Built-in Tech & Entertainment:
- Porsche Communication Management (PCM): An optional system (PCM 2.0 or 2.1) that integrated AM/FM radio, a CD player, and CD- or DVD-based navigation with a small color screen. It also served as an on-board computer display.
- Audio System: A standard CD radio was included, with an optional Bose surround sound system providing a significant audio upgrade.
- Automatic Climate Control: Standard on all trims, offering precise cabin temperature management.
- On-Board Computer: Displayed essential vehicle data such as fuel consumption, range, and outside temperature.
Driver-Assistance Features:
The 2005 Boxster featured limited driver-assistance aids, prioritizing direct driver control.
- Porsche Stability Management (PSM): Standard on all models, integrating traction control and electronic stability control to assist in maintaining control during aggressive driving or adverse conditions. It could be partially disengaged for a more dynamic experience.
- Antilock Braking System (ABS): Standard, preventing wheel lock-up during hard braking.
- Optional ParkAssist: Rear parking sensors were available to assist with parking maneuvers.
Safety Features:
Porsche built the Boxster with robust passive safety in mind.
- Airbags: Dual front airbags, along with Porsche Side Impact Protection System (POSIP), which included thorax airbags integrated into the seats and head airbags (part of the door panel).
- Integrated Roll-Over Protection: Fixed roll-over bars behind the seats provided critical protection in the event of a rollover accident.
- High-Strength Steel Chassis: Designed to create a rigid passenger safety cell.
- Seatbelt Pretensioners: Standard, tightening seatbelts upon impact.
Crash-Test Ratings: Official crash-test ratings from organizations like NHTSA or IIHS are typically not available for low-volume, high-performance sports cars like the Porsche Boxster due to high testing costs and limited sales figures. Porsche, however, conducts extensive in-house safety testing to meet rigorous global safety standards, maintaining a strong reputation for structural integrity and occupant protection.
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.
2005 Porsche 718 Boxster Prices and Market Value
When new in 2005, the base Porsche 718 Boxster carried an MSRP starting around $45,000, while the Boxster S began closer to $55,000. Heavily optioned models could reach into the $60,000-$70,000 range. Today, current used market prices vary widely, from $15,000 for high-mileage examples or those needing significant work, to $25,000-$30,000+ for pristine, low-mileage Boxster S models with documented service.
Depreciation was substantial in its early years, typical for luxury sports cars. However, these models have largely bottomed out in value and, for exceptional examples, are beginning to appreciate slightly. Factors affecting resale value include a comprehensive service history (especially IMS bearing work or bore scoring remediation), overall condition, mileage, desirable factory options (e.g., Sport Chrono, full leather), and the presence of a manual transmission, which is highly sought after by enthusiasts.
Depreciation was substantial in its early years, typical for luxury sports cars. However, these models have largely bottomed out in value and, for exceptional examples, are beginning to appreciate slightly. Factors affecting resale value include a comprehensive service history (especially IMS bearing work or bore scoring remediation), overall condition, mileage, desirable factory options (e.g., Sport Chrono, full leather), and the presence of a manual transmission, which is highly sought after by enthusiasts.
2005 Porsche 718 Boxster Cost of Ownership
Owning a 2005 Porsche 718 Boxster is definitively a costly endeavor, not an economical one. Insurance costs are moderate to high, reflecting its status as a performance vehicle. It requires premium unleaded fuel, leading to noticeable fuel expenses. Maintenance is significantly more expensive than average, demanding specialized Porsche mechanics and higher labor rates for routine services. Repair costs can be exorbitant, particularly if major engine issues like IMS bearing failure or bore scoring arise, potentially costing $10,000-$20,000 or more. Even smaller repairs for convertible tops, sensors, or suspension can be costly due to parts pricing. Long-term ownership necessitates budgeting several thousands annually for maintenance and potential repairs beyond just fuel and insurance. This car is a passion purchase, requiring substantial financial commitment for its upkeep.
2005 Porsche 718 Boxster Fuel Efficiency
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2005 Porsche 718 Boxster Insurance
Insurance for a 2005 Porsche 718 Boxster is moderately priced, reflecting its status as a Vehicle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2005 Porsche 718 Boxster Compare to Other Vehicle?
The 2005 Porsche 718 Boxster (987 generation) faced stiff competition from the BMW Z4 (E85), Audi TT Roadster (8J), and Mercedes-Benz SLK (R171).
Performance:
Features & Reliability:
Price:
When new, the Boxster typically commanded a premium. In the used market, Boxster values are competitive with the Z4 and SLK, often higher than the TT, especially for well-maintained 'S' models, despite potential repair costs.
Recommendations:
For the dedicated enthusiast seeking the purest driving experience, the 2005 Porsche 718 Boxster is peerless, provided they are prepared for its specific maintenance demands. If a more balanced approach to performance, luxury, and potentially lower ownership costs is desired, the BMW Z4 3.0si is an excellent, engaging alternative. The Audi TT Roadster offers unique style and all-weather capability, while the Mercedes-Benz SLK caters to those prioritizing comfort and a hardtop convertible experience.
Performance:
- Porsche 718 Boxster: Undisputed king for pure driving dynamics. Its mid-engine layout provides unparalleled balance, razor-sharp steering, and an incredibly communicative chassis. The Boxster S, with its 280 hp, offers exhilarating acceleration and track-ready handling that few rivals can match.
- BMW Z4 (e.g., 3.0si): Offers a strong front-engine, rear-wheel-drive platform with BMW's renowned inline-six engines (up to 255 hp). It's a genuinely fun driver's car with a beautiful engine note, but its handling is often described as less precise and communicative than the Boxster, leaning more towards a grand touring sports car feel.
- Audi TT Roadster (e.g., 3.2 quattro): More style-focused, featuring standard Quattro all-wheel drive. Its 3.2L VR6 engine (250 hp) provides strong, linear power, but the TT is heavier and its handling, while competent, feels more detached and understeer-prone compared to the Boxster's mid-engine agility. It prioritizes all-weather grip and unique design.
- Mercedes-Benz SLK (e.g., SLK350): Emphasizes luxury, comfort, and its signature power-retractable hardtop. The SLK350 offered 268 hp from its V6, providing brisk acceleration. However, its suspension is softer, and handling less engaging than the Boxster or Z4, aiming for comfortable cruising rather than outright sporting prowess.
Features & Reliability:
- Porsche 718 Boxster: Performance-oriented features with optional luxury. Reliability is a significant concern due to IMS bearing and bore scoring issues, demanding a substantial maintenance budget.
- BMW Z4: A good blend of sportiness and luxury features. Generally considered reliable, though cooling system and some electrical components can become age-related issues.
- Audi TT: Stylish, high-quality interior. Reliability is decent, but some common issues include DSG transmission mechatronics problems and various electrical glitches.
- Mercedes-Benz SLK: More luxurious interior, with the retractable hardtop being a key feature. Reliability is generally good, but Mercedes-Benz specific parts and labor are costly.
Price:
When new, the Boxster typically commanded a premium. In the used market, Boxster values are competitive with the Z4 and SLK, often higher than the TT, especially for well-maintained 'S' models, despite potential repair costs.
Recommendations:
For the dedicated enthusiast seeking the purest driving experience, the 2005 Porsche 718 Boxster is peerless, provided they are prepared for its specific maintenance demands. If a more balanced approach to performance, luxury, and potentially lower ownership costs is desired, the BMW Z4 3.0si is an excellent, engaging alternative. The Audi TT Roadster offers unique style and all-weather capability, while the Mercedes-Benz SLK caters to those prioritizing comfort and a hardtop convertible experience.
Final Verdict: Is the 2005 Porsche 718 Boxster a Good Vehicle?
The 2005 Porsche 718 Boxster is an ideal vehicle for the discerning driving enthusiast who prioritizes exceptional handling, communicative steering, and a visceral connection to the road. It's for someone who appreciates a true mid-engine sports car experience and understands that performance comes with specific responsibilities.
Is it worth buying? Absolutely, for the right buyer. It offers incredible Porsche performance and heritage at a highly accessible used price point. However, it must be approached as a used purchase with extreme caution and preparation. It is emphatically not for buyers seeking a low-maintenance or economical daily driver.
The ideal conditions for purchasing include: a thorough Pre-Purchase Inspection (PPI) by a Porsche specialist, especially confirming IMS bearing status (and ideally, replacement) and checking for bore scoring (critical for 'S' models). A complete service history is paramount. Buyers should also allocate a substantial budget for ongoing maintenance and potential significant repairs. If these conditions are met, the 2005 718 Boxster delivers an immensely rewarding and timeless sports car experience.
Is it worth buying? Absolutely, for the right buyer. It offers incredible Porsche performance and heritage at a highly accessible used price point. However, it must be approached as a used purchase with extreme caution and preparation. It is emphatically not for buyers seeking a low-maintenance or economical daily driver.
The ideal conditions for purchasing include: a thorough Pre-Purchase Inspection (PPI) by a Porsche specialist, especially confirming IMS bearing status (and ideally, replacement) and checking for bore scoring (critical for 'S' models). A complete service history is paramount. Buyers should also allocate a substantial budget for ongoing maintenance and potential significant repairs. If these conditions are met, the 2005 718 Boxster delivers an immensely rewarding and timeless sports car experience.
Jovan
Jovan specializes in interpreting vehicle records and making sense of VIN data. With over 10 years of experience in the automotive data industry, his work ensures that every report is clear, accurate, and useful for car buyers.