Jaguar's replacement for the troubled AJ-V8, found in the XF and F-Type — a genuinely different design that addressed the earlier engine's timing chain tensioner concerns while adding genuinely strong supercharged performance.
This engine represents a genuine clean-sheet redesign rather than an evolution of the troubled earlier AJ-V8 — the timing chain and tensioner design was substantially revised, and the documented issues that defined the earlier engine's reputation have not carried over in any significant way. Supercharged versions deliver genuinely strong, immediate performance, and the overall consensus among independent specialists is that this is a meaningfully more dependable engine than its predecessor.
Not a guarantee, but a pattern seen consistently across owner forums and independent-garage reporting.
Supercharger belt condition is worth checking on examples with frequent spirited use, though failure at this stage remains uncommon.
Examples with documented, consistent maintenance commonly continue reliably well beyond this point.
Ask for documented service history, since this engine, like any high-output design, rewards consistent maintenance.
On supercharged versions, have a specialist check belt condition and listen for any unusual whine or noise change under boost.
Beyond general maintenance history, there's relatively little else specific to flag on this meaningfully improved engine.
Model-specific pages, with notes on how it behaves in that particular car.