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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-12-2016, 08:30 AM   #1
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Join Date: Jan 2016
Location: Florida
Posts: 1
My Ride: 325i
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Hi I just purchased a 02 bmw325i about a week ago. Everything was running fine then all of a sudden I started it one evening leaving work and as I got about half a mile down the rd the temp gauge went straight to hot. I pulled over turned the car off and sit for just a sec like 1 min then I restarted and it stayed on cool all the way home about 5miles. This morning I turned it on to warm up went straight to hot turned it off back on and stayed on cool except now I notice my heater barely putting out. So heat is not working and temp gauge keeps hoping on hot but as soon as car is restarted seems fine.. Any ideas what is going on ?
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Old 01-12-2016, 09:45 AM   #2
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Join Date: Jul 2008
Location: USA
Posts: 5,914
My Ride: 2001 330Ci
These cars plate full of electronix. Erratic voltages can cause a wide variety of issues. How old is the battery? What year is the car? Did you get any maintenance history with the car? Has the cooling system ever been overhauled?
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