ISSUE: A CUSTOMER MAY RAISE A CONCERN OF THEIR VEHICLE NOT PASSING STATE INSPECTION IN CALIFORNIA AND THERE IS NO WARNING LIGHT OR OTHER SUGGESTION OF A FAULT.
full bulletin at NHTSA ↗2006 Jaguar XJ engine problems
moderate 3 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
3
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 3 engine complaints filed for the 2006 Jaguar XJ, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA engine complaint has been filed on this vehicle in over 19 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
"ISSUE: COOLANT EXPANSION TANK STUB PIPE LEAKING ON XJ (X350), XK (X150) OR XF (X250) UP TO THE END OF 2009 MY. CAUSE: THE DESIGN OF THE STUB PIPE WAS NOT ADEQUATE AND COULD RESULT IN THE PIPE SPLITTING."
full bulletin at NHTSA ↗"SITUATION: ON VEHICLES FITTED WITH THE 4.2L NATURALLY ASPIRATED ENGINE ONLY, THE ENGINE MAY EXPERIENCE A ROUGH START OR STALL FOLLOWING A HOT SOAK OF 15-20 MINUTES. CAUSE: THIS MAY BE CAUSED BY THE FUELING CALIBRATION NOT BEING ROBUST FOR WINTER BLEND 10% ETHANOL FUEL."
full bulletin at NHTSA ↗"SITUATION: ON VEHICLES FITTED WITH THE 4.2L NATURALLY ASPIRATED ENGINE ONLY, THE ENGINE MAY EXPERIENCE A ROUGH START OR STALL FOLLOWING A HOT SOAK OF 15-20 MINUTES. CAUSE: THIS MAY BE CAUSED BY THE FUELING CALIBRATION NOT BEING ROBUST FOR WINTER BLEND 10% ETHANOL FUEL."
full bulletin at NHTSA ↗Title: 5.0L V8 (AJ133) overheating due to incorrect
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 2 most recent
2006 Jaguar vdp l wb would not exceed over 10 MPH and warning lights illuminated on the dash. Experienced two massive fuel leaks. *kb the dealer claimed they replaced a seal to fix the fuel leak, however 2 weeks later the fuel leak resurfaced. The dealer then stated the left fuel pump flange was still leaking and the fuel tank was warped. The problem with the vehicle not accelerating over 10…
Tl* the contact owns a 2006 Jaguar xj8 (n/a). The contact stated that while driving approximately 50mph the vehicle began to overheat and the power steering failed. The vehicle was towed to a mechanic who stated the belt tensioner and crankshaft were defective. The vehicle was taken to a Jaguar dealer. They stated that the crankshaft pulley was defective and had come loose. They told him…
Had engine trouble with your 2006 Jaguar XJ?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2006 Jaguar XJ?
It's a documented issue but not catastrophic. 3 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 3 complaints filed, engine issues most often appear around 64,500 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2006/Jaguar/XJ.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.