Jaguar XJ (X350): A Comprehensive Buyer's Guide
The Jaguar XJ (X350), produced from 2003 to 2009, represents a pivotal point in Jaguar's history. It maintains the classic XJ silhouette while introducing significant technological advancements. This guide provides a detailed overview of the X350, designed to assist potential buyers in making informed decisions.
1. Introduction
The XJ (X350) is a full-size luxury sedan, competing with vehicles like the Mercedes-Benz S-Class, BMW 7 Series, and Audi A8. It was designed by Geoff Lawson and replaced the X308 generation. Its claim to fame lies in its aluminum monocoque construction, a first for Jaguar, which significantly reduced weight and improved handling and fuel efficiency compared to its predecessors.
2. Generations
- X350 (2003-2007): The initial release featured the all-aluminum body. Engine options included a 3.0L V6, 3.5L V8, 4.2L V8, and a supercharged 4.2L V8. Significant improvements were made to the interior and electronics compared to the X308. Features included air suspension, advanced braking systems, and a luxurious interior.
- X358 (2007-2009): A facelifted version of the X350, featuring a redesigned front fascia with a mesh grille inspired by classic Jaguars, revised bumpers, and side vents. Interior updates were minimal. Engine options remained largely the same.
3. Reliability & Common Issues
While the X350 offers a luxurious experience, potential buyers should be aware of some common issues:
- Air Suspension: This is the most notorious issue. The air struts are prone to failure, leading to sagging, uneven ride height, and a "CATS Fault" warning on the dashboard. Replacing all four struts can be expensive. Listen for hissing sounds (leaks) when the car is raised or lowered. Aftermarket coilover conversion kits are available as a more permanent, albeit less luxurious, solution.
- Electronic Issues: The X350 is known for its complex electronics, which can be prone to glitches. Common problems include issues with the infotainment system, navigation system, climate control, and various sensors. Check that all electrical systems are functioning correctly, including the lights, windows, door locks, and seat adjustments.
- Timing Chain Tensioners (Pre-2006): Early 4.2L V8 engines (specifically those before 2006) can suffer from timing chain tensioner failure. This can lead to significant engine damage. Listen for rattling noises, especially on startup. Inspect service records for evidence of tensioner replacement.
- Cooling System: The cooling system can be vulnerable to leaks, particularly in the plastic components and around the thermostat housing. Overheating can cause serious engine damage. Inspect the cooling system for signs of leaks or corrosion. Check the coolant level regularly.
- Transmission Issues: The ZF 6HP26 transmission, while generally reliable, can experience problems with the valve body and solenoids. Look for rough shifting or hesitation. Regular transmission fluid changes are crucial for longevity.
- Rust (Rare, but Possible): While the aluminum body is resistant to rust, corrosion can occur on steel subframes, suspension components, and around the battery tray (due to battery acid). Inspect these areas carefully.
- Brake System: The braking system, including the ABS and stability control systems, can be prone to sensor failures. Ensure the ABS and traction control lights are not illuminated. Check the condition of the brake rotors and pads.
- Catalytic Converters: Older X350 models, particularly those with higher mileage, may experience catalytic converter failure. This can result in reduced engine performance and increased emissions.
Important Note: Thorough pre-purchase inspection by a qualified mechanic specializing in Jaguars is highly recommended.
4. Driving Experience
The Jaguar X350 offers a unique blend of luxury, comfort, and performance.
Pros:
- Comfortable Ride: The air suspension provides a smooth and comfortable ride, even on rough roads.
- Refined Handling: The lightweight aluminum body contributes to agile and responsive handling for a car of its size.
- Powerful Engines: The V8 engines offer ample power and smooth acceleration. The supercharged version delivers exhilarating performance.
- Luxurious Interior: The interior is well-appointed with high-quality materials, creating a luxurious and comfortable environment.
- Distinctive Styling: The classic XJ styling remains elegant and timeless.
Cons:
- Reliability Concerns: As detailed above, the X350 can be prone to various mechanical and electrical issues.
- Maintenance Costs: Repairs can be expensive, especially for the air suspension and complex electronics.
- Dated Technology: The infotainment and navigation systems are dated compared to modern cars.
- Fuel Economy: Fuel economy is not exceptional, especially with the V8 engines.
5. Buying Advice
When buying an X350, consider the following:
- Model Year: The 2007-2009 (X358) models are generally considered more desirable due to the facelifted styling and some minor improvements. 2006 and later engines are less prone to timing chain tensioner issues.
- Engine Choice: The 4.2L V8 is the most popular choice, offering a good balance of performance and reliability. The supercharged version is a blast to drive, but expect higher running costs. The 3.0L V6 is adequate but lacks the punch of the V8s.
- Service History: A complete and documented service history is crucial. Pay close attention to maintenance records related to the air suspension, cooling system, and transmission.
- Pre-Purchase Inspection: Arrange for a thorough inspection by a qualified Jaguar mechanic before committing to a purchase. Specifically, have the air suspension, engine, transmission, and electronics checked.
- Budget: Factor in potential repair costs when setting your budget. It's wise to set aside some funds for unforeseen maintenance.
- Condition: Look for a car that has been well-maintained and cared for. Pay attention to the interior condition, as this can be an indicator of how the car has been treated.
- Aftermarket Options: Consider the availability of aftermarket parts and potential upgrades, such as coilover suspension conversions, if you are concerned about the long-term reliability of the air suspension.
Years to look for: 2006-2009 offer the best balance of reliability and features.
Years to potentially avoid (or be extra cautious about): Pre-2006 4.2L V8 models due to timing chain tensioner concerns. By following these guidelines, you can increase your chances of finding a well-maintained Jaguar XJ (X350) that provides years of luxurious and enjoyable driving.