2002 Jaguar XJ8 / XJR (X308)
Browse our directory of 2002 Jaguar XJ8 / XJR (X308) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Common Problems & Reliability
The 2002 Jaguar XJ8 / XJR (X308) has 2 known issues. 2 of these are classified as serious faults that could be expensive to repair.
Primary and Secondary Timing Chain Tensioner Cracking
SeriousEarly AJ-V8 engines fitted to the X308 were assembled with plastic-bodied primary and secondary timing chain tensioners. Over years of thermal stress and exposure to combustion byproducts, the plastic casing becomes brittle and fractures. When the plastic guide shoe delaminates, the secondary chain slips on the camshaft sprocket, throwing valve timing out of synchronization and causing the valves to strike the pistons, typically requiring a complete cylinder head rebuild or replacement engine.
Symptoms: Prominent metallic ticking or rattling from the front timing cover during the first five seconds of a cold start, Rough idle with misfire fault codes stored for banks 1 and 2...
Est. repair cost: £750–£1,400
ZF 5HP24 Forward Clutch A-Drum Failure
SeriousThe ZF 5HP24 five-speed automatic transmission fitted to naturally aspirated 3.2 and 4.0 X308 models suffers from a known structural design defect in the forward clutch A-drum. Excessive hydraulic line pressure pulses caused by a worn main pressure regulator valve fracture the snap-ring retaining lip on the aluminium drum. Once the lip shears, the forward clutch pack fails to compress, completely eliminating forward gears while reverse gear remains functional.
Symptoms: Sudden free-revving with total loss of forward drive when pulling away from a standstill, Gearbox Fault warning illuminated on the instrument cluster with transmission limp-home mode...
Est. repair cost: £1,200–£2,200
Buying Tips for the 2002 Jaguar XJ8 / XJR (X308)
- Confirm through invoices that the upper secondary timing chain tensioners have been replaced with third-generation metal components to prevent sudden catastrophic engine failure.
- On naturally aspirated 3.2 and 4.0 models with the ZF 5HP24 gearbox, verify that forward drive engages immediately from cold without rev flaring or transmission limp-home warnings.
- Check engine temperature behaviour carefully; original plastic water pump impellers can disintegrate without warning, causing sudden severe overheating and warped cylinder heads.
- Inspect front lower wishbone ball joints, anti-roll bar drop links, and rear subframe bushes, which wear rapidly under the weight of the V8 luxury chassis.
- Test every electrical circuit including the central locking, electric memory steering column rake motors, and dual-zone climate control blend flaps for smooth operation.
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