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  1. X3 F25 (2011 - 2017)
    Our 2015 BMW X3 has a bad battery. For example, when I trickle charged it and then disconnected the trickle charger, the battery would rapidly lose charge (without ever turning on the car). The dealer acknowledges that the battery is bad. But they also say that the alternator needs to be...
  2. Que, Ont, NB, NS, Nfld, PEI
    Hey Gang Getting intermitant battery charging malfunction Battery test is good..... Alternator voltage is reading a little higgh from my perspective.... 14.9 volts.... is that high for a 320i? Is there voltage regulator on this vehicle that could be the source of the problem or is it...
  3. E39 (1997 - 2003)
    I've got an 01, 540i, and I've redone the sound system with different speakers and two 10" subs in the trunk. I feel like my battery isn't that old and I replaced the alternator acouple months ago but now I'm having lighting issues, engine codes, and the sound from my headuint is getting...
  4. E90/E91/E92/E93 (2006 - 2013)
    My E92 electrical madness continues so I am coming at it from a different angle. Please look at the other posts. When driving I get around 12.5 v on the dash reading from the 'secret' menu no.9. It increases to up to 14.4v when braking due the regenerative system but sits at 12.5 mostly...
  5. E60 / E61 (2004 - 2010)
    2010 BMW 535i 6MT N54 engine Dear all reaching out for your wisdom and experience with potential low voltage alternator issues. My battery (Original OEM BMW) is nearing the end of its useful life after almost seven years, and today I had the first episode of the car not cranking to a start...
  6. E60 / E61 (2004 - 2010)
    Hey all, I replaced my alternator about two years ago and have noticed some of the wires on the outside are beginning to corrode / have some of the coating eaten away. Is this something to be worried about? I'm wondering if there's a shield that can be put over it. The only thing I can think...
  7. 7 Series & 8 Series
    My BMW 745i has been experiencing an unknown issue at first it was the starter changed the starter, then change the alternator, bought a brand new battery car will turn over but would not start please help is a very good car hat for a while no bad history of maintenance issues. Have Kept up on...
  8. E60 / E61 (2004 - 2010)
    Hi Bimmers, I tried to find the answer online, but was not lucky to find. Anybody knows when to change the alternator? I have 09 528i , 95k miles without any issues. I am not sure if I will keep the vehicle another year. Do you guys think I should change the alternator? Thanks much,
  9. F10 / F11 (2011 - 2016)
    Alright so, I'm doing a project on my E30 316 with the M10 engine. Going one step at a time. I'm going for a 2liter turbo project and I want to have some stuff on the car and not be worried about the 65A alternator getting really worked hard. I already have a 1200w amp, want to get electric...
  10. E60 / E61 (2004 - 2010)
    Hello everyone. I hope someone can point me in a direction on this issue because I have been banging my head against a wall and joined here to ask for some help. I have a 2005 545i with only 109,000 miles on it. The basic issue is that it is only intermittently charging the battery and let's...
  11. E46 M3 (2001-2006)
    What happened? / Events: Car started misfiring while in Highway at low Revs (3k) - check engine light on - Shut down, turn back on and still misfires - Pulled to the side for 30 min, kept headlights and wazard lights on - Activated the voltage testing and recorded 11.9V key in 2nd position. -...
  12. Do-It-Yourself H.Q.
    My 2001 e53 clicks one time when I try and start it and that’s all. When I try and jump it it will start but not stay running. I’m just not sure exactly what to check, and or why this would be happening. My battery is good, I don’t think it’s my alternator. I’m thinking it’s my starter or my...
  13. E46 (1999 - 2006)
    Hi all, long time reader and first time poster here! The other day the red battery light on my beloved 2002 E46 (325i) came on while driving. A bunch of other lights dashboard also flickered. In the ond only the battery charging red light and a light indicating that one of my daylights was not...
  14. E46 (1999 - 2006)
    im pretty lost right now, my e46 is giving me a little trouble.When the car hasnt been driven for some hours it starts and works without any issues, but last time i drove it it gave me some weird dashboard lights, like the espn, eml, handbrake and abd light, so i stopped the car and turned it...
  15. F10 / F11 (2011 - 2016)
    Hi just tought i share my experience and also ask question... So long story short i have an f10 pre face lift, i was traveling through europe with my car this was like 6-7 months ago, when my alternator failed on the Autobhan off course.... I went to nearest garage asked them to change the...
  16. E90/E91/E92/E93 (2006 - 2013)
    Dont replace your alternator before you watch this video
  17. E46 (1999 - 2006)
    Ok, so today I decided to replace my alternator, put the new one on, put everything back together and when I went to turn my car on I get nothing, no crank or anything. Lights and radio all turn on, car wont crank. So I thought, maybe it's a faulty alternator so I put the old one back in and...
  18. General BMW Questions
    Hello, I own a 2009 328i that just reached 106,000 miles. I recently replaced coil #4 because of a cylinder misfiring. Last night was unbelievably cold, to the point where when I looked at my car this morning the headlight washer covers had burst off the bumper from the frozen ice inside the...
  19. E39 (1997 - 2003)
    Hello I just did a alternator replacement on my 01 540i but couldn't find many options on the alternator. Since it's a liquid cooled alternator I got the standard 150amp one. Its already in and the car is running again problem is I have 7 Optima batteries installed in the car. I have a huge...
  20. E46 (1999 - 2006)
    Hey! I have been trying to find the coolant leak on my 99 e46 for a few weeks now and I don't know what it could be. After getting a coolant system pump I found the first leak, which was at the thermostat, and successfully fixed that by changing the thermostat housing gasket. Now it's leaking...
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