Generations
X300 — X300 (First Generation)
1994–1997
4.0L Supercharged V8
X308 — X308 (Second Generation)
1997–2003
4.0L Supercharged V8
X350 — X350 (Third Generation)
2003–2009
4.2L Supercharged V8
X351 — X351 (Fourth Generation)
2009–2019
5.0L Supercharged V8
Top issues to watch for
The most serious Jaguar Xjr problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Dangerous
Subframe and mounting point structural corrosion (X308)
The aluminium monocoque body structure on X308 XJRs suffers from galvanic corrosion where steel suspension mounting points are welded to the aluminium chassis. Road salt accelerates this process, causing structural weakness at critical load-bearing areas within 30cm of suspension, subframe, and spring mounting points. MOT data shows this generation fails structural integrity tests at 17.1 times the national fleet average at higher mileages. This is a known issue specific to Jaguar's early aluminium construction methods, resolved in later generations with improved joining techniques.
What happens if ignoredStructural failure at suspension mounting points creates immediate safety risks including loss of vehicle control, suspension collapse, or wheel detachment. Professional structural welding and reinforcement typically costs £2,000-£5,000. Cars with significant structural corrosion may be uneconomical to repair and should not be driven until assessed by a structural specialist.
Specialist
£2,000–£5,000
Main dealer
£3,000–£7,000
Parts only
£500–£1,500
Major
Suspension joint dust cover deterioration (X350)
The rubber dust covers (gaiters) protecting ball joints and suspension bushes on X350 XJRs degrade rapidly, failing at 251 times the national fleet average. Once the protective cover fails, dirt and moisture contaminate the joint, accelerating wear and causing premature failure of expensive suspension components. This affects both front and rear suspension systems and is particularly problematic on the complex multi-link rear setup. The issue is specific to the rubber compounds used during this generation's production period.
What happens if ignoredFailed dust covers allow rapid contamination and wear of ball joints, control arm bushes, and suspension links. Replacing individual suspension components typically costs £200-£800 per corner. If multiple components fail simultaneously due to contamination, total suspension rebuild costs can reach £3,000-£5,000.
Independent garage
£150–£400
Specialist
£200–£500
Main dealer
£300–£700
Parts only
£50–£200
Major
Wheel bearing excessive play (X308/X350)
Wheel bearings on X308 and X350 XJRs develop excessive play at 16.1 times the national fleet average, particularly at higher mileages. The heavy weight of these luxury performance saloons, combined with the stresses from the performance-oriented suspension setup, accelerates bearing wear. Failed wheel bearings create safety risks and can damage the hub assembly, ABS sensors, and surrounding suspension components if not addressed promptly.
What happens if ignoredFailed wheel bearings can cause wheel wobble, loss of steering control, and potential wheel detachment in extreme cases. Early replacement of individual bearings costs £200-£400 per corner. If the bearing seizure damages the hub assembly or knuckle, repairs can cost £800-£1,500 per corner.
Independent garage
£200–£400
Specialist
£250–£500
Main dealer
£400–£700
Parts only
£80–£200
Major
Steering rack gaiter deterioration (X350)
The rubber gaiters (dust boots) protecting the steering rack on X350 XJRs fail at nearly 20 times the national fleet average. These protective covers prevent dirt and moisture from contaminating the steering rack mechanism and damaging the internal seals. Once the gaiter fails, the power steering fluid leaks out and contaminants enter the system, leading to expensive steering rack replacement. The issue appears to be related to the rubber compound quality used during this generation's production.
What happens if ignoredFailed steering rack gaiters lead to contamination of the rack mechanism, causing premature wear of internal seals and components. Early gaiter replacement costs £150-£300. If contamination damages the steering rack, replacement costs £800-£1,500 plus alignment. Continued driving with failed gaiters will result in complete power steering failure.
Independent garage
£150–£300
Specialist
£200–£400
Main dealer
£300–£500
Parts only
£40–£100
1 more known issues tracked
Including wear items, electrical niggles, and generation-specific problems. Check a specific car to see which issues apply to its age and mileage.
Check a Jaguar Xjr →MOT failure hotspots
Based on DVSA MOT test data. These are the items where the Jaguar Xjr fails at a significantly higher rate than the average car.
Suspension ball joints worn
Suspension · 60-80k miles
MOT failure rate: 251x the fleet average
Sample: 445 tests
Transmission joint, belt or chain worn
Bodywork · 80-100k miles
MOT failure rate: 61x the fleet average
Sample: 324 tests
Power steering fault
Steering · 120-150k miles
MOT failure rate: 42x the fleet average
Sample: 146 tests
Wheel bearings worn
Suspension · 40-60k miles
MOT failure rate: 42x the fleet average
Sample: 117 tests
ABS fault
Suspension · 60-80k miles
MOT failure rate: 35x the fleet average
Sample: 110 tests
Coil springs broken
Suspension · 100-120k miles
MOT failure rate: 35x the fleet average
Sample: 345 tests
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Related
Jaguar Xjr reliability FAQs
What are the most common problems with the Jaguar Xjr?
The Jaguar Xjr has 5 known issues across 3 severity levels. The most serious are: Subframe and mounting point structural corrosion (X308).
Is the Jaguar Xjr reliable?
The Jaguar Xjr has 1 dangerous and 3 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.
How much does it cost to fix Jaguar Xjr problems?
Costs vary by issue. Independent garages are typically 30-50% cheaper than main dealers for most repairs.
Which Jaguar Xjr generation is most reliable?
The X300 (1994–1997) has the fewest dangerous issues (0). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.