BMW Z4 E85 M54 Cooling System Refresh
BMW
3 Series
2003
M54 2.5/3.0
Safe to Drive?
✅ Safe to Drive
Urgency Level
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The plastic cooling system components on E85 Z4 M54 crack with age. Full cooling refresh (tank, hoses, thermostat housing) every 10 years. Cost: £300-500.
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