It'll not be factory, but who cares at 155K. I checked realOEM, there are no repair terminals I could find for the main battery cables at the battery box (there are repair parts for the terminals under the hood). The positive battery lead is an available part for $149 (you could probably reuse the cables you have, just cut them to good clean And, of course, the cable 61129312133. OPTIONAL: Magnetic tray holder, makes life easier. Steps: 1) Disconnect the battery and leave your trunk open. If you have split seats, I highly recommend you fold them down just in case. 2) Remove cup holders. Use a trim tool to gently pry open the compression tabs. Make sure the battery is for the correct one for car and model. Maybe its not the correct battery and is causing these faults. Call dealer and ask for part # battery your car needs and compare with the one you have. Buddy of mine had also electric issues caused by a simple lose minus or plus pool on the battery. E90 (M3 Sedan) E92 (M3 Coupe) E93 (M3 Convertible) With S65 engine BMW of North America, LLC is conducting a Voluntary Safety Recall (effective June 19, 2019) on certain Model Year 2010-2012 BMW vehicles that were produced from December 1, 2009 through October 4, 2011. This was an existing Service Action that has now been upgraded. Add to that a '11 BMW 335ix and a '14 Mercedes C300. So, to aide in debugging and battery maintenance, I ended up purchasing a very inexpensive ( $19.99 ) battery tester from Harbor Freight, it works great! Have used it to help out many neighbors too! Best feature is putting the battery under load and seeing how it measures up. inexpensive . A full-fledged electrical malfunction plagues your BMW when the alternator starts failing or goes bad. Even though your car may start, it will go off very soon. The headlights may become extremely dim. In serious cases of a bad alternator, the battery may get discharged and 'stone dead.'. One of the first symptoms of a weak battery is that the comfort access don't work properly anymore. Either you need a few tries or it doesn't react at all. Also if the engine need 1-2 seconds more to start up, your battery probably causing the problem. And yep it is terrible what they are asking for a battery reprogramming.. scratch that, alternator was bad, just not bad enough to throw a code. Only charging at 12.7-12.8, should've been 13.5-14.0. Nearly killed the battery (was down around 12.0v when alt. was bad and measured from batt terminals,) maybe my experience chasing gremlins will help someone else. edit for clarity So last week I got the Christmas tree of lights on the dash in my 08 335i e92. I was able to limp it home and shut it off. The car would not restart so I checked the voltage at the battery and it was 7.2v. So I replaced the battery and had it coded at bmw the same day. Today i got the same lights on with loss of power and stuck in 5th gear. They seem to last about 3-4 years these days When buying a new one make sure it's coded to your car. Failure to code it to your car will result in the battery being overcharged dramatically reducing it's life expectancy. I need a new battery too. Keeps getting those annoying low batt warnings.

bmw e90 bad battery symptoms