Bimmerfest - BMW Forums - View Single Post - Weak or No Start...battery test shows battery is fine
View Single Post
Old 01-07-2013, 08:27 PM
Yorgi's Avatar
Yorgi Yorgi is offline
Officially Welcomed to the 'Fest
Location: Toronto
Join Date: Mar 2005
Posts: 3,650
Mein Auto: '04 M3 / '06 650i Cab
That sounds 100% like a battery on the way out. Do you know how old the battery is?

Was it load tested? If yes I would get a second opinion.

If you hook up a charger for a few minutes, it partially charges the battery giving it enough juice to start the car. Most jumper cables are not thick enough to jump a car right after hooking up, they need to stay connected for a few minutes to charge up the dead battery.

If the battery is good the only other things I can think of are:
1) something is putting a constant drain on the battery even when the car is off for more than 45 minutes. This would drain down the battery to the point where the car will not start.
2) your battery cable is not properly connected (loose or corrosion) so it passes some electricity but not enough to start the car. The connection problem can be at the battery or the other end of the cable.
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater

Last edited by Yorgi; 01-08-2013 at 05:08 PM. Reason: typo - repeated word
Reply With Quote