Jaguar XJ Autobiography Re-viewed: The Flagship That Deserved a Better Ending

The Jaguar XJ Autobiography remains a deeply appealing used luxury car because it offers the sort of style, comfort and individuality that many newer flagships struggle to match. Its diesel engine makes particular sense for long-distance work, while the rear air suspension helps give the big Jaguar its composed character. Yet this is not a car to buy on appearance alone, because ageing electronics, complex luxury equipment and potentially serious mechanical issues can turn a bargain into an expensive lesson. Choose carefully, however, and the XJ still feels like one of the more special ways to cover serious kilometres.

Why the Jaguar XJ Autobiography still stands apart

The X351-generation XJ was a dramatic departure when it arrived, replacing Jaguar’s familiar upright limousine look with a sleek, almost fastback-shaped saloon. More than a decade on, its low roofline, blacked-out rear pillars and restrained use of chrome have aged rather better than many of its more aggressively styled German contemporaries.

It also understood that a flagship saloon should not feel remotely like a punishment from the driver’s seat. Despite measuring more than five metres long in long-wheelbase form, the XJ has responsive steering, a keen front end and an ability to disguise its size once it is moving.

The ride is not quite as isolated as an air-sprung Mercedes-Benz S-Class, particularly on large wheels and poor surfaces, but the Jaguar’s compromise is attractive. Its rear air suspension combines with adaptive damping to give the car real motorway composure without entirely removing the driver from the road beneath.

That makes the XJ a more interesting proposition than its chauffeur-car appearance initially suggests. It is comfortable enough for long days in the saddle, yet has sufficient agility to make a quieter back road feel like a reasonable diversion.

The 3.0-litre diesel engine is central to that long-distance appeal, especially in later 300PS form with 700Nm of torque. It does not need to be worked hard, and the eight-speed automatic can make the Jaguar feel effortless rather than overtly fast, which suits a car of this character.

For buyers who regularly travel on motorways, that diesel engine remains a persuasive part of the package. Strong overtaking response, modest fuel use for the size of the car and the potential for substantial distances between fuel stops make it a proper continent-crossing saloon rather than merely a plush commuter car.

Inside, the Jaguar XJ Autobiography makes an unusually convincing case against buying something more predictable. Leather, wood veneers, polished trim and deeply cushioned seats give the cabin warmth that some contemporary luxury cars sacrificed in pursuit of a more technological, almost clinical atmosphere.

Long-wheelbase cars are especially tempting for anyone intending to use the rear seats, with equipment potentially including reclining seating, massage functions, rear entertainment displays, blinds and separate climate controls. The sloping roofline means it feels less airy than a boxier rival, but that intimacy makes the Jaguar feel more like a private room than an expensive taxi.

The risks behind a used luxury car bargain

The difficulty is that the Jaguar XJ Autobiography is now old enough for deferred maintenance to matter more than low mileage or attractive specification. A pristine-looking car with incomplete invoices, neglected servicing and several dormant warning lights is unlikely to be the clever used luxury car purchase it first appears.

The rear air suspension deserves particular attention, as ageing airbags, compressors, valves, sensors and air lines can all cause trouble. A car sitting low at the rear, leaning to one side after being parked overnight or running its compressor excessively should be investigated properly rather than dismissed as a simple airbag replacement.

The diesel engine also needs careful consideration because its suitability depends heavily on how it has been used. Frequent short journeys can interrupt diesel particulate filter regeneration, and owner reports on later Euro 6 cars have highlighted fuel dilution of the engine oil and unusually frequent service requirements.

That makes a diesel XJ difficult to recommend for a buyer whose routine consists mainly of short urban trips. For regular motorway drivers it remains much more logical, but evidence of regular oil changes, the correct lubricant and a healthy DPF system should be treated as essential rather than desirable.

There are more serious concerns, too, including reported inlet manifold and throttle body faults, along with the possibility of costly main bearing or crankshaft failures on the 3.0-litre V6. Not every diesel engine will suffer such a failure, but the potential severity means a detailed service history, specialist inspection and proof of timing-belt maintenance are worth far more than a low odometer reading.

Petrol alternatives are not automatically the safe option, as early 5.0-litre V8 and 3.0-litre supercharged V6 engines have their own documented timing-chain and cooling-system concerns. Whichever engine is fitted, cold-start noises, coolant loss, warning messages and a vague history should all be treated as reasons to walk away or negotiate from a position of considerable caution.

Then there is the equipment list, which is magnificent when it works and mildly terrifying when it does not. Check every seat adjustment, heating, ventilation and massage function, along with the touchscreen, climate zones, powered blinds, rear displays and rising rotary gear selector, because a weak battery or electrical fault can create a surprisingly long list of symptoms.

Ultimately, the Jaguar XJ Autobiography is still worth buying because it delivers elegance, long-distance comfort and genuine driver appeal in a way few rivals manage. Find a carefully maintained example with a convincing history, especially if choosing the diesel engine and checking the air suspension, and this ageing flagship remains an indulgence with real substance rather than merely a cheap route into expensive trouble.