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Hi Guys, I checked the battery status of my 2013 BMW X5 using ISTA+ today and got the message saying the battery charge was too low (see the attached picture). Actually these were the readings I got many times before (in the 60%-80% range), and never said it was too low. The battery is six years old now. Any ideas? Thanks.
 

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Take it over to a local shop and have them test the battery. They can tell you if its going out or not. @ 6 years its probably getting pretty tired.
 

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We have seen plenty of 'tested good' batteries not work in these modern BMWs.

Agree that at 6+ years old, might be time....

Oh, and "60-80 range" is different that 55%.... I had a 2010, the day before I lemoned it back to BMW in 2012, I had all doors open for 1.5hrs cleaning it up- triggered a batt discharge warning. You do anything unusual?
 

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Hi Guys, I checked the battery status of my 2013 BMW X5 using ISTA+ today and got the message saying the battery charge was too low (see the attached picture). Actually these were the readings I got many times before (in the 60%-80% range), and never said it was too low. The battery is six years old now. Any ideas? Thanks.
see...by any chance if your suspension air bags are not leaking...if they did...I think pump would be starting and your battery will drain..i experienced that
and it was a real pain. Those cars if left unused for extended period of time will self discharge easily. I suggest you get a battery disconnector if you garage it.
 

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Nuclear engineer
02/2012 X5 35d M57Y CPO 99K miles NOKIAN WR G3 12K miles
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The battery is six years old now. Any ideas? Thanks.
The maximum expected life time of a battery is eight years under the best of circumstances. Six years is a pretty good life time.

There is another datum, State of Health, that may influence the warning. The mention of startability is suggestive. At registration of a new battery, the initial starting capability may be recorded - minimum voltage under actual starting maximum current load. At each subsequent starting cycle the minimum voltage may be compared to the initial datum. The ratio is a typical State of Health calculation.

Were I in this circumstance, I would charge the battery with a trusted battery charger and expect to charge a bit more than 40% of nominal capacity, >40 AH into a 100 AH battery, about 10 hours charge with my CTEK 4.3 MUS charger. This charger also has a Recondition capability that I would try.

http://batteryfaq.org/
 

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Discussion Starter #6
Thank you all for the comments and suggestions.

Ard, I didn't do anything unusual such as leaving the doors open for an extended period of time.

Tadeusz, I don't know if that is the problem. How can I check that? I use the car almost everyday going back and forth to work.

PeterO, I had the battery checked by Autozone late last year, and it was OK under load test. Seems the service life is approaching the end at around six years.

Doug, You are an expert on battery. I will go to the dealer tomorrow for airbag recall service and check the price of a new battery of the same AH and model. At this age, I may just go ahead to replace the battery.
 

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You should price the prompter size battery at "not a BMW dealer" so you can understand their price...

Or even pick up a new one while on your way to the dealer, drop it in ar the parts story paking lot. Offer the dealer $50 to code it
 

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You should price the prompter size battery at "not a BMW dealer" so you can understand their price...

Or even pick up a new one while on your way to the dealer, drop it in ar the parts story paking lot. Offer the dealer $50 to code it

I already found a battery in local O'Riley's store, 95RPLT AGM from Super Start at $189 plus tax. If the dealer can offer me a price comparable to this, I will buy from them. Otherwise, I will go with mine. I can register it using ISTA. Thanks.
 

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Best price I could find was at the dealer. Sometimes the dealer will surprise you...

I came in with the dead battery, picked up the new one, installed it and registered it myself.

 

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Advance auto best deal, got the h8 agm for 140 after coupon 20% off. Order online pick up in store.
Plus with that purchase, their speed perks plan, I got another discount $20 off a 50 order!

The coupon code, search retailmenot for advanced auto coupon codes.
 

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Advance auto best deal, got the h8 agm for 140 after coupon 20% off. Order online pick up in store.
Plus with that purchase, their speed perks plan, I got another discount $20 off a 50 order!

The coupon code, search retailmenot for advanced auto coupon codes.
Is H8 AGM 105 AH? I thought it should be H9. I will check.
 

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The maximum expected life time of a battery is eight years under the best of circumstances. Six years is a pretty good life time.

There is another datum, State of Health, that may influence the warning. The mention of startability is suggestive. At registration of a new battery, the initial starting capability may be recorded - minimum voltage under actual starting maximum current load. At each subsequent starting cycle the minimum voltage may be compared to the initial datum. The ratio is a typical State of Health calculation.

Were I in this circumstance, I would charge the battery with a trusted battery charger and expect to charge a bit more than 40% of nominal capacity, >40 AH into a 100 AH battery, about 10 hours charge with my CTEK 4.3 MUS charger. This charger also has a Recondition capability that I would try.

http://batteryfaq.org/
If this charger has the typical wet cell "reconditioning" profile of boosting / pulsing output voltage to 18V or so to stir up the electrolyte & hopefully knock off a bit of sulfation buildup on the grids via excess & rapid gas production from electrolysis of the electrolyte, I'd NOT perform this function on an AGM battery unless it was already beyond hope (as it will introduce voids & pockets of trapped gas within the glass mat separators, as well as potentially causing excess pressure levels that can cause the pressure relief valves to vent the gasses to ambient environment, thus throwing off the electrolyte concentration / quantity of H2O), and would certainly NOT do it w/ the battery connected to the vehicle's electronics that often have 16 - 18 WVDC capacitors...
 

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Is H8 AGM 105 AH? I thought it should be H9. I will check.
H8 90ah 900cca
H9 might fit but I went with the size that matched the 35d battery.

I forgot to mention that there is bank of America and amex than have their own deals that give an extra 20% off. If you have either of these credit cards go on the page and choose the deal and use that card. That's how it was 140 and change for me.
 

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Low battery charge causes other problems

I have a 2003 325i wagon that I bought 3 years ago. The battery should have been replaced then, but I made it three years. I bought a Diehard jump starter because I couldn't afford a battery. However, I was replacing coils because the car ran rough and I constantly had service engine codes showing up.

Finally I took it to a local German car specialist and he replaced the old battery for $300 including installation and resetting computer codes.

I've had no problems since getting the new battery. Car runs smooth, is not throwing codes. My brother-in-law works for a big tractor company and he said this is a common problem that occurs with the new electronics-heavy tractors. I hadn't any idea a low battery could cause this kind of issue.

The battery in my wagon had 8 or 9 years on it. If you're getting lots of codes and your car is running crappy, you might check to see if your battery needs to be replaced. I would have saved myself a lot of grief if I'd gotten a new battery a couple of years ago.
 

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The alternator puts out a pulsed dc current which is more pulsed at low speeds like idle.
A good battery acts like a capacitor, smoothing out those ripples.
It reduces electrical "noise".
A weak battery, one that can barely start your car, would pass more noise into your electronics.
 

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Discussion Starter #17
I have a 2003 325i wagon that I bought 3 years ago. The battery should have been replaced then, but I made it three years. I bought a Diehard jump starter because I couldn't afford a battery. However, I was replacing coils because the car ran rough and I constantly had service engine codes showing up.

Finally I took it to a local German car specialist and he replaced the old battery for $300 including installation and resetting computer codes.

I've had no problems since getting the new battery. Car runs smooth, is not throwing codes. My brother-in-law works for a big tractor company and he said this is a common problem that occurs with the new electronics-heavy tractors. I hadn't any idea a low battery could cause this kind of issue.

The battery in my wagon had 8 or 9 years on it. If you're getting lots of codes and your car is running crappy, you might check to see if your battery needs to be replaced. I would have saved myself a lot of grief if I'd gotten a new battery a couple of years ago.

The engine as well as all the electronics are running fine right now. The only thing that triggered my concern was the diagnostic statement saying battery charge too low. I will certainly replace the battery as soon as I see any sign of going out. My local BMW dealer ask for $218 for the battery and $450 for the total including installation and register. I think I will buy the battery from O'Riley and register it myself using ISTA.
 

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Hi Guys, I checked the battery status of my 2013 BMW X5 using ISTA+ today and got the message saying the battery charge was too low (see the attached picture). Actually these were the readings I got many times before (in the 60%-80% range), and never said it was too low. The battery is six years old now. Any ideas? Thanks.
I would get a CTEK 3300 battery tender.. Have a 2014 328i Xdrive 25k miles bought in Aug 2018. first real shot of zero weather Thanksgiving and car told me overnight drain, Bought this tender on Amazon for about $60, perfect for AGM battery.. desulfurize's pulse charges, and was fine for two months. Signal came up again after not driving for 4 days,and 10 degree temps, I don't drive much so need to charge every couple months, did again mid January, no problems since.
I've had 30+ cars/trucks and toys, 3 Mercedes and the Mercedes were all were 10-14 yr old original batteries before needed new ones, being in the trunk they don't get overheated in the summer under the hood by engine. My BMW battery is OEM 2013, and should last me at least 7-12 yrs if properly maintained.. Get a good programmed too, when you replace the battery you need to program the car to charge the new one properly

Advance auto and auto zone have good batteries, AGM that are 900 amp 95 AH that replace the current one perfectly, for about $190, mins the 25% code and speedperks your out for $150 dealer is $500, most garages can program them, if your known they do for free, or 30 min labor
 

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Discussion Starter #19
H8 90ah 900cca
H9 might fit but I went with the size that matched the 35d battery.

I forgot to mention that there is bank of America and amex than have their own deals that give an extra 20% off. If you have either of these credit cards go on the page and choose the deal and use that card. That's how it was 140 and change for me.
I plan to stick with 105Ah battery, which is the OEM battery on my vehicle right now, so I don't need to reprogram the VO and only need to do the registration. Not that I cannot reprogram it, just to avoid the hassle.
 

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Discussion Starter #20
I would get a CTEK 3300 battery tender.. Have a 2014 328i Xdrive 25k miles bought in Aug 2018. first real shot of zero weather Thanksgiving and car told me overnight drain, Bought this tender on Amazon for about $60, perfect for AGM battery.. desulfurize's pulse charges, and was fine for two months. Signal came up again after not driving for 4 days,and 10 degree temps, I don't drive much so need to charge every couple months, did again mid January, no problems since.
I've had 30+ cars/trucks and toys, 3 Mercedes and the Mercedes were all were 10-14 yr old original batteries before needed new ones, being in the trunk they don't get overheated in the summer under the hood by engine. My BMW battery is OEM 2013, and should last me at least 7-12 yrs if properly maintained.. Get a good programmed too, when you replace the battery you need to program the car to charge the new one properly

Advance auto and auto zone have good batteries, AGM that are 900 amp 95 AH that replace the current one perfectly, for about $190, mins the 25% code and speedperks your out for $150 dealer is $500, most garages can program them, if your known they do for free, or 30 min labor
Thanks. I will check Advance Auto and AutoZone to see what they can offer. But I do want to stay with 105 Ah AGM battery. Wonder if you can keep your OEM battery longer than 7 years, which will be amazing.
 
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