I have an '03 325i which has suddenly started overheating. I replaced the reservoir bottle, the fan assembly, & the thermostat. Still overheating. Any ideas? Owned 5 BMWs, new prob.

Asked by Mar 31, 2015 at 07:54 PM about the 2003 BMW 3 Series 325i

Question type: Maintenance & Repair

Overheating.  Tried everything.  Standard transmission.

4 Answers

251,225

Did you properly bleed the system? Maybe a fault water pump or fan not running? .http://forum.e46fanatics.com/showthread.php?t=825186

2 of 2 people found this helpful.
67,555

Im leaning toward the water pump.

2 of 2 people found this helpful.
1,525

Is there a squeaking sound while the car is running? That's a sign of a failing water pump. I'd check out the water pump.

Water pump is fine. Fan works properly, but I'm thinking maybe a computer problem. Might not be getting signal to kick in?

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