Maintaining Your Jaguar XJS: Top Parts for Peak Performance

The Jaguar XJS, often viewed as the underappreciated successor to the iconic E-Type, has quietly earned its place as one of the most refined grand tourers of the 20th century. Produced from 1975 to 1996, the XJS delivered elegance, comfort, and potent performance. Whether you drive the early V12 coupe or a later AJ16 inline-six convertible, preserving your Jaguar XJS in top condition requires attention to detail and, more importantly, reliable Jaguar XJS Parts. With its sophisticated mechanics and luxurious fittings, the XJS demands careful maintenance to keep it performing the way Jaguar intended. Let’s explore the parts most vital to keeping your XJS running smoothly and looking like the sleek road machine it was born to be.

Why the Jaguar XJS Still Matters

While it took time for the XJS to emerge from the E-Type’s shadow, today it’s appreciated for what it is: a true GT car. Designed for long drives and high-speed cruising, the XJS offered innovations like fuel injection, independent rear suspension, and, later on, an advanced automatic transmission system. With a comfortable ride and timeless design, it’s now considered a modern classic. However, as with any vehicle approaching or exceeding 30–40 years of age, maintenance is key. A well-maintained XJS can be a joy to drive, but one neglected can become a headache. Thankfully, with quality parts from reputable suppliers like SNG Barratt, you can restore and maintain your XJS to a high standard.

Essential Jaguar XJS Parts for Reliability and Performance

1. Engine and Fuel System Components

The XJS came with various powertrains, from the legendary 5.3L V12 to the more efficient 4.0L inline-six. These engines, while powerful, require routine upkeep:

• Fuel Injectors and Pumps – Over time, these components clog or weaken, leading to power loss or poor fuel economy.
  
• Distributor Caps and Spark Plugs – These wear items affect ignition timing and efficiency.
  
• Gaskets and Seals – Aging seals can lead to oil leaks, especially around the cam covers and sump pan.
  

Complete tune-up kits and gasket sets are essential for keeping engine performance in top form. If your car hasn’t had a major service in a while, it’s time to stock up.

2. Cooling System Upgrades

If there’s one weak point in older Jaguars, it’s the cooling system. This is especially true for V12 models, which produce a lot of heat.

• Radiators – Upgrading to a modern aluminum radiator improves cooling efficiency.
  
• Thermostats and Water Pumps – These should be inspected and replaced every few years.
  
• Coolant Hoses and Expansion Tanks – Brittle hoses can crack under pressure, so replacing them is a must.
  

An overheating Jaguar is never fun. Replacing worn-out cooling system components will protect your engine from costly damage.

3. Suspension and Steering Components

The XJS offers a plush ride, but worn suspension parts can lead to clunking, uneven tire wear, and vague steering feel.

• Bushings and Ball Joints – Rubber components degrade over time and should be replaced to restore ride quality.
  
• Shock Absorbers and Springs – New dampers improve handling and reduce body roll.
  
• Steering Rack and Tie Rods – Essential for responsive cornering and safety.
  

Consider refreshing the entire suspension if the car still has its original components—it’ll make a dramatic difference in how the car drives.

4. Brake System Maintenance

Brakes are often overlooked but are vital for safety and performance.

• Brake Pads and Rotors – Upgrade to performance pads for better bite and fade resistance.
  
• Calipers and Brake Hoses – Rebuilding or replacing calipers improves brake feel and eliminates sticking.
  
• Master Cylinder – A spongy brake pedal may point to a failing master cylinder.
  

High-quality brake parts not only improve stopping power but restore confidence behind the wheel.

Interior Comfort and Electronics

1. Electrical Reliability

Older Jaguars are infamous for electrical quirks. From flickering gauges to failing window switches, issues are often due to corroded connectors or outdated components.

• Wiring Harnesses – Replacing brittle wires helps avoid shorts and random failures.
  
• Switches and Relays – Power window switches, headlight relays, and wiper motors can be easily replaced using OEM-spec parts.
  
• Instrument Cluster Components – Fixing non-working gauges brings the dashboard back to life.
  

2. HVAC System Components

The heating, ventilation, and air conditioning system in the XJS is complex, especially in later models.

• Blower Motors and Resistors – If airflow is weak or inconsistent, these parts are likely culprits.
  
• A/C Compressors and Condensers – Rebuilding or replacing these helps keep cabin temperatures comfortable.
  

3. Upholstery and Trim

The XJS’s interior is a luxurious space. But after decades of wear, leather may crack, and trim may come loose.

• Seat Covers and Foam – Available in original colors and stitching patterns.
  
• Wood Veneers – Replacement veneer kits can rejuvenate the dash and center console.
  
• Carpets and Headliners – These details go a long way in restoring the cabin’s charm.

Exterior Restoration and Styling Parts

From its long hood to its curved rear, the XJS is unmistakable. To keep it looking sharp:

• Weather Seals – Replace old door, boot, and window seals to stop wind noise and leaks.
  
• Light Lenses and Reflectors – Cracked or foggy lenses can be easily swapped for clear new ones.
  
• Chrome Trim and Badges – Fresh trim pieces enhance curb appeal and bring out the original styling.
  

Body panels and bumpers are also available from select suppliers, making accident repair or rust remediation more manageable.

Why Choose SNG Barratt for Jaguar XJS Parts?

With a deep inventory of authentic and reproduction Jaguar parts, SNG Barratt is a go-to source for XJS owners. They provide detailed parts diagrams, fast shipping, and expert support, making it easier than ever to keep your Jaguar in pristine condition. Whether you’re tackling a minor fix or planning a full restoration, their inventory of Jaguar E-Type Parts covers everything you need—from engine internals to interior accessories and everything in between.

Maintenance Tips for Jaguar XJS Owners

• Service regularly – Stick to scheduled oil changes, coolant flushes, and brake inspections.
  
• Store it well – Keep your car in a dry, covered environment to avoid corrosion.
  
• Drive it often – Jaguars don’t like sitting idle. Regular driving keeps mechanicals lubricated and batteries charged.
  
• Document everything – Maintain service records and receipts, which help preserve resale value.

Conclusion

The Jaguar XJS is a true British classic that offers a uniquely elegant driving experience. While maintaining one comes with its challenges, it’s also incredibly rewarding. With the right care and the right parts, your XJS can deliver countless miles of smooth, stylish motoring. Don’t settle for generic parts or patchwork fixes—give your XJS the care it deserves with premium components from trusted suppliers like SNG Barratt. Whether you’re maintaining a daily driver or restoring a future concours winner, quality parts make all the difference.