Car Problem Reports

Jaguar S-Type Persistent Coolant Loss Due to Small Leak at Coolant Reservoir

Jaguar S-Type Problem
37 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2006

Heating & Air Conditionings Affected: 3.0L V6, 4.0L V8

Average Mileage: 91,747 mi (33,000 mi - 150,000 mi)


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.

  • Visitor, , 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.

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  • Visitor, , 67,000 mi

    top hose connection nipple broke at tank side. very weak design.

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  • Visitor, , 68,000 mi

    This just happened on my 2006 S-type. Must be design or part flaw.

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  • Visitor, , 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?

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  • Visitor, , 33,000 mi

    still leaking and filling....

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  • Visitor, , 92,000 mi

    leak in Coolent Reservoir & tube

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  • Visitor, , 140,000 mi

    Car is overheating. Add engine coolant light was coming on

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  • Visitor, , 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.

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  • Visitor, , 104,000 mi

    Coolant loss and overheat

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  •  Rookie

    I hear a gurgling noise when I turn off the ignition.

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