Disconect Battery

125

Asked by Dec 31, 2012 at 09:16 PM about the 2003 BMW 5 Series 525i

Question type: General

What happens if i totally diconnect the battery on my car????

3 Answers

90,055

Nothing - if you're disconnecting for the winter, have it fully charged to prevent freezing . Disconnect the negative side first and connect it last any time working on a battery. It prevents shorting a metal wrench on something when removing the positive terminal. Disconnecting the battery sometimes clears codes in the ECU.

5 out of 5 people think this is helpful.
210,565

You'll also lose your radio presets, MPG and trip odometer readings.

3 out of 3 people think this is helpful.
1,705

in a 2003 BMW if you completely disconnect the batter for a long period of time it will erase the user memory, your car does have cpu's in the car that know how you drive (i forget the term that is used specifically) but it will have to relearn your driving habits which gives you the most optimized gas mileage based off you as the driver... along with that you will lose your radio settings and what not as Tom mentioned above. Nothing that wont correct itself over time (cept maybe your clock and radio presets).

3 out of 3 people think this is helpful.

Your Answer

Add photo

Related Questions

5 Series

Looking for a Used 5 Series in your area?

CarGurus has 17,687 nationwide 5 Series listings starting at $1,500.

ZIP:

Search BMW 5 Series Questions

BMW 5 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,810
#2 Michael Branan
Michael Branan
Reputation 730
#3 Robert Charlson
Robert Charlson
Reputation 670
View All

Related Models For Sale

Used BMW 3 Series
1,801 Great Deals out of 40,895 listings starting at $1,250
Used BMW 7 Series
181 Great Deals out of 5,861 listings starting at $1,600
Used Mercedes-Benz E-Class
769 Great Deals out of 22,838 listings starting at $1,600
Used BMW X5
598 Great Deals out of 16,872 listings starting at $2,788
Used BMW 6 Series
127 Great Deals out of 3,239 listings starting at $7,495
Used BMW M5
40 Great Deals out of 632 listings starting at $7,990
Used Mercedes-Benz C-Class
1,005 Great Deals out of 32,766 listings starting at $1,950
Used Audi A6
194 Great Deals out of 7,521 listings starting at $2,695
Used BMW M3
81 Great Deals out of 2,149 listings starting at $3,495
Used Mercedes-Benz S-Class
176 Great Deals out of 6,001 listings starting at $2,500
Used Audi A4
358 Great Deals out of 13,166 listings starting at $1,599
Used Honda Accord
1,227 Great Deals out of 77,867 listings starting at $969

Used Cars For Sale

2017 BMW 5 Series For Sale
140 listings starting at $57,988
2016 BMW 5 Series For Sale
118 Great Deals out of 6,677 listings starting at $32,429
2015 BMW 5 Series For Sale
13 Great Deals out of 390 listings starting at $24,800
2014 BMW 5 Series For Sale
79 Great Deals out of 1,863 listings starting at $17,993
2013 BMW 5 Series For Sale
144 Great Deals out of 2,007 listings starting at $15,500