BMW X5 E70 Thermostat Housing Coolant Leak
BMW
X5
2007
N52/N54 Petrol
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
🚫 Do NOT Drive
Safety Impact
Direct safety risk — affects safe operation of the vehicle
Urgency Level
🟡 Monitor Closely
The plastic thermostat housing on N52/N54-engined X5 cracks and causes coolant loss. Loss is often gradual and may be missed until the engine overheats. Replace the thermostat housing, thermostat and coolant hoses simultaneously. Cost: £250-450.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this BMW X5 2007 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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