AI Damage1994 Jaguar XJ12: common problems
Owners of the 1994 Jaguar XJ12 filed 10 complaints with NHTSA, most often about engine and cooling and service brakes. Details by component below, with sources.
Key figures
- Owner complaints
- 10
- involving a crash
- 1
What fails most often
- 1 Engine and cooling 40% of all complaints
- 2 Service brakes 30% of all complaints
- 3 Vehicle speed control 30% of all complaints
- 4 Electrical system 20% of all complaints
- 5 Suspension 20% of all complaints
- 6 Fuel system 10% of all complaints
- 7 Powertrain 10% of all complaints
- Engine and cooling: 4 complaints (40% of all).
- Service brakes: 3 complaints (30% of all), 1 of them with a crash reported by the owner.
- Vehicle speed control: 3 complaints (30% of all).
- Electrical system: 2 complaints (20% of all).
- Suspension: 2 complaints (20% of all).
Symptoms owners describe
How many of the 10 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine and cooling | 4 | 0 | 0 |
| Service brakes | 3 | 1 | 0 |
| Vehicle speed control | 3 | 0 | 0 |
| Electrical system | 2 | 0 | 0 |
| Suspension | 2 | 0 | 0 |
| Fuel system | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
While driving 55 mph, the radiator fluid leaked and the vehicle overheated. The vehicle was repaired, but the failure recurred. Recall service # 5451 was found on autozone.com (alldata). The dealer will diagnose the failure on july 13, 2007, per the recall notice. The purchase date was unavailable.
The self-leveling suspension system failed. According to the dealerships, there is not a remedy for this failed system other than to replaced it with the same system. Jaguar made replacements kits for the xj6 but not for the xj12
Ignition failure resulted in vehicle fire, possibly related to the faulty design of the marelli ignition system.
This caused unburned fuel and air to be pumped into the fuel exhaust system, which then overheated the catalytic converter and started a fire. Dealer has been contacted.
Cruise control locked up -- car continued to accelerate -- brakes inoperative against a 300 hp engine -- condition corrected when cruise turned off.
Vehicle continues to experience engine failures, hydraulic reservior leaking on one repair.
Vehicle fails to start with turn of key. After several attempts it will start.
Throttle sticking so that the car will continue to go forward when brake applied.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 10,921 of 36,659 model years in the NHTSA data (top 30% most complained about).
On average one model year of the XJ12 has 3 complaints (4 years in the data). This year has 10, above average.
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Other years of this model
Questions and answers
What are the most common problems with the 1994 Jaguar XJ12?
Owner complaints to NHTSA most often mention: engine and cooling, service brakes, vehicle speed control. Total complaints: 10. The most frequent symptoms in complaint texts: overheating, coolant loss (20%), smoke, burning smell, fire (20%), engine failure or replacement (10%).
How many service bulletins (TSB) were issued for the 1994 Jaguar XJ12?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 1994 Jaguar XJ12 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 1994 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.