Mclaren 675lt | History, Reliability & Buying Guide

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McLaren 675LT: A Comprehensive Guide

The McLaren 675LT, where 'LT' stands for 'Longtail,' is a high-performance, limited-production supercar that represents the pinnacle of the McLaren 650S platform. Introduced in 2015, it pays homage to the McLaren F1 GTR Longtail of the late 1990s, embracing the principles of reduced weight, optimized aerodynamics, increased power, and enhanced driver engagement. The 675LT firmly resides in the supercar class, rivaling cars like the Ferrari 488 GTB (and later 488 Pista) and Lamborghini Huracan Performante.

Generations

The McLaren 675LT has only one generation, but it's important to distinguish between the coupe and spider variants.

675LT Coupe (2015-2016): The initial offering, limited to 500 units worldwide. Features a fixed roof, lightweight components, a distinctive 'Longtail' design with 40% more downforce than the 650S, and a re-engineered 3.8-liter twin-turbocharged V8 engine.
675LT Spider (2016): A convertible version of the coupe, also limited to 500 units. Shares the same performance enhancements as the coupe but with a retractable hardtop. The Spider retains impressive rigidity and performance despite the open-top design.

Reliability & Common Issues

While the McLaren 675LT is an exceptional performance machine, potential buyers should be aware of some potential issues. Proper maintenance is critical for long-term reliability.

Engine Oil Leaks: McLaren's M838T engine, while potent, can be prone to oil leaks, particularly around the oil cooler lines and turbocharger seals. Regular inspection and preventative maintenance are essential. Look for signs of leaks on the garage floor or around the engine bay.
Transmission Issues: The 7-speed dual-clutch transmission (SSG) can experience issues, particularly with hard use. Listen for any unusual noises during shifting, such as clunking or grinding. Ensure the transmission fluid has been changed according to McLaren's recommended schedule. Potential problems can stem from faulty sensors, solenoids, or even clutch wear with high mileage or track use.
Hydraulic Suspension Issues: McLaren's ProActive Chassis Control system (hydraulic suspension) is sophisticated, but can be susceptible to leaks and malfunctions. Listen for any unusual noises from the suspension and inspect for signs of fluid leaks. A failing accumulator or damper can significantly impact the car's handling.
Electrical Glitches: Like many modern supercars, the 675LT can occasionally experience electrical glitches. This can range from minor issues like infotainment problems to more serious issues affecting sensor readings or engine management. A thorough diagnostic scan is recommended before purchase.
Carbon Fiber Panel Damage: The 675LT features extensive use of carbon fiber, which is lightweight but can be expensive to repair if damaged. Carefully inspect the body panels for any signs of cracks, chips, or delamination. Pay particular attention to the front splitter and rear diffuser.
Cooling System: The high-performance nature of the engine requires an efficient cooling system. Check for any signs of coolant leaks and ensure the cooling fans are functioning correctly. Overheating can lead to serious engine damage.
Battery Issues: McLarens are known to be sensitive to battery condition. A weak battery can cause a variety of electrical problems. Ensure the battery is in good condition and properly maintained, especially if the car is not driven regularly. A battery tender is highly recommended.

Important Note: Pre-purchase inspections by a McLaren-certified technician are crucial. These inspections can identify potential issues that may not be immediately apparent.

Driving Experience

The McLaren 675LT offers an exhilarating and visceral driving experience. It's a car that demands respect and rewards skilled drivers.

Pros:

Explosive Performance: The 666 bhp (675 PS) engine delivers breathtaking acceleration and relentless power throughout the rev range.
Sharper Handling: The 675LT's lighter weight, stiffer suspension, and improved aerodynamics result in incredibly precise and responsive handling. It feels significantly more agile and engaging than the 650S.
Enhanced Aerodynamics: The 'Longtail' design generates significantly more downforce, providing exceptional stability at high speeds and in corners.
Incredible Sound: The lightweight titanium exhaust system produces a raw and aggressive exhaust note that is truly intoxicating.
Driver-Focused: The 675LT is designed with the driver in mind. The seats are supportive, the steering is precise, and the controls are intuitive. It is a very engaging and rewarding car to drive.

Cons:

Ride Comfort: While the suspension is adaptive, the 675LT is a performance-focused car, and the ride can be firm, especially on rough roads.
Limited Practicality: Storage space is minimal, making it less suitable for long journeys.
Running Costs: Maintenance, repairs, and insurance can be expensive.
Heat Soak: In hot climates, the engine bay can experience heat soak, potentially affecting performance. Proper cool-down procedures are essential.

Buying Advice

Purchasing a McLaren 675LT requires careful consideration. Here's what to look for:

Condition is Key: Prioritize cars with a clean title and a documented service history from a reputable McLaren dealer.
Pre-Purchase Inspection: Absolutely essential. Have a McLaren-certified technician perform a thorough inspection to identify any potential issues. This is non-negotiable.
Mileage Considerations: While higher mileage isn't necessarily a deal-breaker, pay close attention to the car's overall condition and service history. A well-maintained, higher-mileage car may be a better option than a low-mileage car that has been neglected.
Coupe vs. Spider: The choice between the coupe and spider comes down to personal preference. The coupe offers slightly better performance due to its lighter weight and increased rigidity, while the spider provides the thrill of open-top driving. The coupe is generally considered to be slightly more desirable.
Options and Colors: Consider the options and color combinations that appeal to you. Some options, like the vehicle lift system and carbon fiber interior trim, can enhance the car's usability and desirability. Unusual or rare colors might command a premium.
Avoid Neglected Examples: Be wary of cars that show signs of neglect, such as deferred maintenance, damaged bodywork, or a lack of service records. These cars may require significant investment to bring them up to standard.
Price Research: Research current market values to ensure you're paying a fair price. Prices can vary depending on condition, mileage, options, and location.
Warranty: If possible, look for a car with some remaining factory warranty or consider purchasing an extended warranty.
Financing and Insurance: Secure financing and insurance before committing to a purchase. Insurance costs can be substantial for high-performance supercars.

In conclusion, the McLaren 675LT is a remarkable supercar that offers an unparalleled driving experience. By carefully researching and inspecting potential purchases, you can find a well-maintained example that will provide years of driving enjoyment.

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