Coolant Loss and Engine Overheating on Jaguar S-Type

The plastic coolant reservoir is prone to leak. The reservoir can mysteriously lose coolant or coolant may pool under the engine compartment. If this occurs, the coolant reservoir should be inspected for cracks. If leaks are neglected, the reservoir may fail and cause the engine to overheat.

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Average mileage: 86,901 (500–158,000)
Heating & Air Conditionings affected: 3.0L V6, 4.0L V8
7 model years affected: 2000, 2001, 2002, 2003, more2004, 2005, 2006
46 people reported this problem
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Viewing 1 - 20 of 23 problem details
Engine is not overheating. Leak starts as soon as I park and turn off the engine. No indications that the paddle of coolants are coming from the engine. Accumulated paddle is below the coolant reservoir. No indication of leak when the car is park for a long time.
2003 Jaguar S-Type 140,000 mi,
Car is overheating. Add engine coolant light was coming on
2004 Jaguar S-Type 87,000 mi,
Persistant loss of anti freeze, checked hoses, dealer said I needed a new high pressure hose, $400 later I still had the leak. I found that the bottom of the plastic reservoir was cracked. I purchased one from for $45 and replaced it myself.
2000 Jaguar S-Type 113,000 mi,
Same deal. Coolant backflowing, no internal heat/defrost, etc. and my performance has dropped considerably. "Trusted" mechanic quoted me $800 to replace reservoir and lower PCV valve grommet assembly. Looks like I can get the parts online for $110 and take the hour necessary to replace it myself, unless anyone has info on something I'm missing here?
2006 Jaguar S-Type 67,000 mi,
top hose connection nipple broke at tank side. very weak design.
I hear a gurgling noise when I turn off the ignition.
2006 Jaguar S-Type 92,000 mi,
leak in Coolent Reservoir & tube
2003 Jaguar S-Type 104,000 mi,
Coolant loss and overheat
2006 Jaguar S-Type 68,000 mi,
This just happened on my 2006 S-type. Must be design or part flaw.
2004 Jaguar S-Type 33,000 mi,
still leaking and filling....
2004 Jaguar S-Type 75,000 mi,
First my lower hose cracked, the replacement was $300+, I noticed some anti freeze still leaking and found the the leaking was from the reservoir, cost about $60.00.
2003 Jaguar S-Type 45,000 mi,
Discovered a anti-freeze leak and discovered that the coolant reservoir where the little hose enters at the top of bottle is leaking
i brought it to a repair shop at est. 90,000 and had the coolant reservoir replacement, Had to do it again at 106,000 miles. Seems like an ongoing problem. I also have this jerking problem when transmission shifts to first gear. I brought it to the dealer in 2007 and then I think in 2009 and they stated that they could not see the problem. I have been dealing with this jerking problem ever since.
2002 Jaguar S-Type 80,000 mi,
coolant leak on wifes car, she was told it is from reservoir and fender has to be taken off to replace. I just looked at and think thats crapp
2002 Jaguar S-Type 10,500 mi,
I had a leak for about a week from reservoir I took it to a shop and they found a crack.on the bottom they replaced it for 260 dollars. Ouch
2006 Jaguar S-Type 500 mi,
at 500 miles my thermistate was replaced, at 1200 miles leak in coolent tank and it has bee replaced 4 times along with water pump 4 times I think I got a lemon.
2004 Jaguar S-Type 78,000 mi,
The motor of the car over heats, coolant will drain extremely quick, and the transmission slips.
2000 Jaguar S-Type 90,000 mi,
very slight coolant lose, found very small crack in coolant reservoir. Replaced with new reservoir from Ford dealer. 2000 Lincoln LS (same tank)
2003 Jaguar S-Type 56,656 mi,
Kept smelling Antifreeze fluid. checked the reservoir and saw areas of leak. when I push on the hose it broke off and had to replace reservoir tank.
2000 Jaguar S-Type 118,000 mi,
Replace head gasket(s)