1994 Jaguar Xj12 problems
The Jaguar XJ is a series of mid-size/full-size luxury cars produced by British automobile manufacturer Jaguar Cars (becoming Jaguar Land Rover in 2013) from 1968 to 2019. It was produced across five basic platform generations (debuting in 1968, 1986, 1994, 2003, and 2009) with various updated derivatives of each. From 1970, it was Jaguar's flagship four-door model. The original model was the last Jaguar saloon to have been designed under the leadership of Sir William Lyons, the company's founder, and the model has been featured in countless media and high-profile appearances.
Series 1, 2, and 3 (1968–1992)
Overview
The first generation Jaguar XJ was produced for a total period of 24 years, with two major facelifts – in 1973 and in 1979, with a raised front bumper and less tall grilles.
For four years, the 1968 introduced XJ was always a four-door, straight-six saloon on a 2.76 m (108.75 in) wheelbase. In 1972, a more spacious, 4-inch (10 cm) longer wheelbase (LWB) option, and a 5.3 litre V12 engine were added. On the XJ series II (from 1973), the standard wheelbase (SWB) saloons were cancelled in 1974 – but a SWB two-door (series II only) coupé was sold from 1975–1978.
The 1979 series III saloons received a redesigned greenhouse (upper body) and bumpers. The 6-cylinder series III models were replaced by the second generation Jaguar XJ in 1987, but the V12 models not until 1992.
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Common 1994 Jaguar Xj12 problems
The 1994 Jaguar XJ12, a luxury car produced by Jaguar from 1972 to 1996, has been known for its powerful V12 engine, sleek styling, and luxurious features. However, like any car, it has its fair share of issues. Here are some of the most common problems reported by owners of the 1994 Jaguar XJ12:
- Fuel system problems: The fuel system in the 1994 Jaguar XJ12 can be prone to issues such as clogged fuel injectors, faulty fuel pumps, and dirty fuel filters. These problems can cause the engine to run poorly or not start at all. Regular maintenance, such as a fuel system flush, can help prevent these issues.
- Suspension system issues: The air suspension on the 1994 Jaguar XJ12 can fail, resulting in a bumpy ride and poor handling. Additionally, suspension components such as shocks and bushings can wear out over time and require replacement.
- Electrical problems: Electrical issues are common in the 1994 Jaguar XJ12 and can manifest in a variety of ways, from problems with the starter motor or alternator to issues with the car's lights and electronics. Faulty wiring, corroded connectors, and failing components can all contribute to these issues.
- Rust: Like many older luxury cars, the 1994 Jaguar XJ12 is susceptible to rust, particularly in areas with harsh winter weather or high humidity. Regular maintenance, such as washing and waxing the car and inspecting for rust, can help prevent these issues from becoming more serious.
- Engine issues: The V12 engine in the 1994 Jaguar XJ12 can suffer from various issues such as overheating, oil leaks, and poor fuel economy. Regular maintenance, such as checking the engine oil and coolant levels, can help prevent these issues.
Are Jaguar V12 engines reliable?
The 6.0 litre V12 is a great engine, much improved over earlier V12s, and nearly indestructible unless overheated. A real powerhouse, too. They are definitely more complicated, expensive, and time consuming to work on. For this reason they're not for everybody.
How many 1994 Jaguar XJ12 were made?
The full numbers produced for the US version seem to be five in 1991 (likely engineering or evaluation prototypes), then 39 in December 1992, 1121 in 1993 (the bulk including this one) and a final 400 in 1994.
What are the common issues with the Jaguar XJS V12?
The engine is divided into two banks, separated by the ignition system. The rotor is prone to breakage, and the result is that your engine won't get a spark, and your catalytic converter will get hot while being filled with combustible air. If ignored, the catalytic converter will set the car on fire.
How fast is a XJ12?
146 mph
This car had an enormous impact. Coupled with the high standards of refinement and comfort of the XJ6, the new 5.3 litre engine gave the XJ12 a top speed of 146 mph (235 km/h), and the list price at launch was only £3,725.
1994 Jaguar Xj12 car problems categorized by type of issue
After analyzing all complaints sent to the NHTSA and researching popular Jaguar Xj12 problems, we found that the most common problems with these 2023 model year vehicles are:
- Engine and engine cooling problems
- Vehicle speed control problems
- Service brakes problems
- Hydraulic problems
- Suspension problems
The graph below shows statistics for all 1994 Jaguar Xj12 vehicle components and the number of complaints received.
1994 Jaguar Xj12 complaints
The NHTSA has received 16 complaints about various vehicle components related to the 1994 Jaguar Xj12.
ENGINE AND ENGINE COOLING PROBLEM
- Date Of Incident: 2005-06-15
- VIN: SAJMX1341RC
- Components: ENGINE AND ENGINE COOLING
- Summary: TL*THE CONTACT OWNS A 1994 JAGUAR XJ12. THE CONTACT STATED THAT THE VEHICLE DEVELOPED A LEAK IN THE COOLANT EXPANSION TANK ALONG THE SEAM WELD. 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 CURRENT MILEAGE IS 71,000 AND FAILURE MILEAGE WAS 63,000.
SUSPENSION PROBLEM
- Date Of Incident: 2024-11-24
- Components: SUSPENSION
- Summary: 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
ELECTRICAL SYSTEM PROBLEM
- Date Of Incident: 2024-11-24
- Fire: 1
- Components: ELECTRICAL SYSTEM
- Summary: IGNITION FAILURE RESULTED IN VEHICLE FIRE, POSSIBLY RELATED TO THE FAULTY DESIGN OF THE MARELLI IGNITION SYSTEM. *MJS
ENGINE AND ENGINE COOLING PROBLEM
- Date Of Incident: 2024-11-24
- Fire: 1
- VIN: SAJMX1345RC
- Components: ENGINE AND ENGINE COOLING
- Summary: THIS IS A 12 CYLINDER ENGINE WITH ONLY 6 CYLINDERS WORKING. 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. *AK
SERVICE BRAKES, HYDRAULIC,VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 1999-04-09
- VIN: SAJMW1342RC
- Components: SERVICE BRAKES, HYDRAULIC,VEHICLE SPEED CONTROL
- Summary: CRUISE CONTROL LOCKED UP -- CAR CONTINUED TO ACCELERATE -- BRAKES INOPERATIVE AGAINST A 300 HP ENGINE -- CONDITION CORRECTED WHEN CRUISE TURNED OFF. *AK
ELECTRICAL SYSTEM PROBLEM
- Date Of Incident: 2024-11-24
- VIN: SAJMX1341RC
- Components: ELECTRICAL SYSTEM
- Summary: VEHICLE FAILS TO START WITH TURN OF KEY. AFTER SEVERAL ATTEMPTS IT WILL START.
ENGINE AND ENGINE COOLING PROBLEM
- Date Of Incident: 1997-11-14
- VIN: SAJMW1345RC
- Components: ENGINE AND ENGINE COOLING
- Summary: VEHICLE CONTINUES TO EXPERIENCE ENGINE FAILURES, HYDRAULIC RESERVIOR LEAKING ON ONE REPAIR.
VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 1998-02-24
- Components: VEHICLE SPEED CONTROL
- Summary: THROTTLE STICKING SO THAT THE CAR WILL CONTINUE TO GO FORWARD WHEN BRAKE APPLIED.
VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 1998-02-24
- Components: VEHICLE SPEED CONTROL
- Summary: VEHICLE EXPERIENCED SUDDEN ACCELERATION.
SERVICE BRAKES, HYDRAULIC,VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 1998-02-24
- VIN: SAJMX134XRC
- Components: SERVICE BRAKES, HYDRAULIC,VEHICLE SPEED CONTROL
- Summary: MADE A LEFT TURN, ATTEMPTED TO STOP WITH FOOT ON BRAKE, BACK WHEELS SPUN AND SMOKED. THROTTLE STUCK AND WOULD NOT RELEASE. ALMOST STANDING, HOLDING FOOT ON BRAKE. FINALLY RELEASED BRAKE AND CAR SLOWED DOWN. *AK
ENGINE AND ENGINE COOLING PROBLEM
- Date Of Incident: 1994-05-23
- VIN: SAJMX1340RC
- Components: ENGINE AND ENGINE COOLING
- Summary: OXYGEN SENSOR RELAY FAILED, RESULTING IN VEHICLE NOT STARTING.
SUSPENSION PROBLEM
- Date Of Incident: 1994-08-10
- VIN: SAJMX1340RC
- Components: SUSPENSION
- Summary: MISALIGNED FRONT END, CAUSING VEHICLE TO PULL TO THE RIGHT.
SERVICE BRAKES, HYDRAULIC PROBLEM
- Date Of Incident: 1994-10-19
- Number Of Injuries: 1
- Crash: 1
- VIN: SAJMX1340RC
- Components: SERVICE BRAKES, HYDRAULIC
- Summary: BRAKE PUMP FAILED, CAUSING LOSS OF CONTROL/ACCIDENT/INJURY. *SKD
ENGINE AND ENGINE COOLING PROBLEM
- Date Of Incident: 1994-10-31
- VIN: SAJMX1340RC
- Components: ENGINE AND ENGINE COOLING
- Summary: VEHICLE HESITATES WHEN ACCELERATING DUE TO COOLANT TEMPERATURE SENSOR FAILURE.
FUEL SYSTEM, GASOLINE PROBLEM
- Date Of Incident: 2024-11-24
- VIN: SAJMX1340RC
- Components: FUEL SYSTEM, GASOLINE
- Summary: FUEL PUMP RELAY FAILED, PREVENTING VEHICLE FROM STARTING.
POWER TRAIN PROBLEM
- Date Of Incident: 1995-01-21
- VIN: SAJMX1340RC
- Components: POWER TRAIN
- Summary: VEHICLE STUCK IN PARK POSITION THREE TIMES, ALSO INTERMITTENTLY FAILS TO START IN PARK GEAR.
1994 Jaguar Xj12 recalls
The National Highway Traffic Safety Administration (NHTSA) has issued 2 recalls for different components of the 1994 Jaguar Xj12.
- Manufacturer: HONEYWELL INTERNATIONAL, INC.
- Components: FUEL SYSTEM, GASOLINE
- Summary: CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURED FROM OCTOBER 18, 2005, THROUGH MARCH 21, 2006, SOLD FOR USE ON THE VEHICLES LISTED ABOVE AND ON CERTAIN SCHOOL BUSES. (TO SEE THE SCHOOL BUS ENGINE SIZES, CLICK ON "DOCUMENT SEARCH" AND THEN "BUS APPLICATIONS"). THE CONNECTOR ON THE FUEL FILTER WAS NOT MANUFACTURED TO HONEYWELL'S SPECIFICATION. AS A RESULT, THE O-RING MAY NOT SEAT CORRECTLY ON THE FUEL LINE.
- Consequence: THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. IN THE PRESENCE OF AN IGNITION SOURCE, A FIRE COULD OCCUR.
- Remedy: HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 18, 2006. OWNERS MAY CONTACT FRAM CUSTOMER SERVICE AT 1-800-890-2075 (OPTION 1).
- Manufacturer: JAGUAR CARS
- Components: STRUCTURE:BODY:HOOD
- Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE HOOD LINER CAN SAG AND INTERFERE WITH THE THROTTLE LINKAGE.
- Consequence: THIS CONDITION CAN CAUSE HIGH ENGINE IDLE SPEED, INCREASING THE RISK OF A CRASH.
- Remedy: DEALERS WILL REPAIR THE HOOD LINER.
Additional sources
More sources of information about 1994 Jaguar Xj12 problems:
XJ12 reliability - Jaguar Forums - Jaguar Enthusiasts Forum
Dec 16, 2020 ... It is very reliable. The V12 is very well suited to the X300 chassis. It is surprising to me that it was such low production. The caveat is that ...
1994 V12 Engine Reliability(?) - Modern - Jag-lovers Forums
Jul 31, 1998 ... I have been considering the 94 XJ12 with the 6.0L V12 as in the XJS, but I keep getting warnings about the engine. I thought that the 94+ ...
Advice regarding 1994 XJS - Jaguar Forums - Jaguar Enthusiasts ...
Aug 29, 2010 ... XJS ( X27 ) - Advice regarding 1994 XJS - I have ... XJS V12 engines are not common to the 6.0L. ... problems might not be the wisest idea. Will ...
Jaguar XJ Key Fob: Troubleshooting, Replacement, and Common ...
Jan 4, 2016 ... Ok Richard if u lock from the dash it works fine, but I see the problem the driver seat door lock is not fully closing, so if your inside the ...
Common/known issues with the XJ - Jaguar Forums - Jaguar ...
Oct 25, 2023 ... As far as I have been able to find – here are the most common/known issues with the XJ All models. Corrosion on runners for sunroof (early ...
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