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      08-26-2014, 04:23 PM   #1
wheelie good
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335i e92 Low Battery Charge Warning

Last couple of days I am getting a yellow warning message on the console stating low battery charge.

What make/type of battery would a 2009 335i M Sport Highline car have installed?

Will this battery need to be registered, I read the m3cutters forum board sometimes and its mentioned often on that site.

Does the battery have to be registered on my car/all BMW's in general or is it just for the m3 models cars only?

I use a good independent garage, if its needs registering would this garage be able to do it or do you have to take it to a BMW dealer?

Thanks in advance
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      08-26-2014, 05:42 PM   #2
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Models vary but my 2008 335i had a 700A/ 70aH battery AGM type.

Battery must be registered be it by a dealer or a garage with suitable diagnostic equipment.If not done the charging system will incorrectly charge the battery.
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      08-27-2014, 02:15 AM   #3
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I changed the batteyr in my E92 335i three weeks ago due the same thing and a few mornings waking up to a totally dead car.

Did some research on the registration thing and decided I'd not bother, the best answer I found was that the car knows the state and type of battery it has so sends the charge accordingly from the alternator. So on that I bought one with the same cranking Amps and its been fine since, soon as I start my car it shows 14.7V across the battery so it seems to be charging OK.

http://www.eurocarparts.com/ecp/c/BM...404ba2f&000020
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      08-27-2014, 02:45 AM   #4
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As I understand it you only really need to code the car if the battery properties are different on the new battery. I replaced mine about two months ago, and I haven't bothered coding it yet and I've had no noticeable adverse impact.

BMW wanted 320 to supply and fit. I got a replacement from ECP for 120 and fitted it myself in 30 minutes.
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      08-27-2014, 04:16 AM   #5
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Once again..,it's nothing to with coding.Its about telling the car the batteries been changed.Youre new battery's life will be shortened because the car will still think it's original battery is fitted and charge it more aggressively.when you register a battery it resets this back to a new battery again.It takes less than a minute to do on a suitable diag machine or you can even do it with that Inpa.
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      08-27-2014, 04:31 AM   #6
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There is a decent thread here about the pros/cons of registering and also some theories on it being just a way for BMW to empty our pockets. I think it will shorten my new battery life but I won't own the car that long so not too bothered.


http://www.bimmerfest.com/forums/sho...d.php?t=567915
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      08-27-2014, 04:44 AM   #7
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Quote:
Originally Posted by K_M79 View Post
Once again..,it's nothing to with coding.Its about telling the car the batteries been changed.Youre new battery's life will be shortened because the car will still think it's original battery is fitted and charge it more aggressively.when you register a battery it resets this back to a new battery again.It takes less than a minute to do on a suitable diag machine or you can even do it with that Inpa.
So you are saying if the battery properties are different then you don't need to 'tell' the car? That's not what I've read.
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      08-27-2014, 05:39 AM   #8
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If you replace the battery like for like ,exact same etc then it only needs registered as 'changed' to reset the intelligent charging system.If for some reason you go for more or less powerful versions you have to do a retrofit reprogramme to adjust the DME(more time consuming).Say what you want about it being a scam by BMW but I can assure you it needs to be done.A lot of people don't seen to appreciate how electronically advanced these cars are and still try and cut corners to save a buck.
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      08-27-2014, 09:06 AM   #9
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I got a replacement battery from bmminiparts, great value.

For the registration I did it using the BM Technic software, i think anything like that should be able to do it.

Personally I don't get why you need to register it, all seems a bit over the top but did it as I already had the software and took 2 minutes....
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      08-27-2014, 10:17 AM   #10
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Quote:
Originally Posted by Greg330 View Post
I got a replacement battery from bmminiparts, great value.

For the registration I did it using the BM Technic software, i think anything like that should be able to do it.

Personally I don't get why you need to register it, all seems a bit over the top but did it as I already had the software and took 2 minutes....
See above.

As a battery ages it becomes less effective as most people will know.So the cars electronics will adjust the current and voltage charge levels to the battery to remain seamless as the unit ages.If you change battery and don't tell it it continues as if it was the old one, thus potentially damaging it/ over charging it.Registration of new battery tells the DME that a new one is fitted and to treat it accordingly.As I've said, pretty elaborate electronically and corners shouldn't be cut just because someone doesn't think it's 'necessary' 'oh my last car didn't you didn't need to do this so I won't bother' etc
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      08-27-2014, 01:50 PM   #11
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We know what BMW charge as it's been mentioned above but what have people been charged by Indys to register a new battery ?
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      08-27-2014, 02:05 PM   #12
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It takes less than 5 mins so charges would be minimal.
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      08-28-2014, 04:45 AM   #13
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Quote:
Originally Posted by K_M79 View Post
It takes less than 5 mins so charges would be minimal.
you'd hope so but we all know how all garages can charge. bmw main stealer diags take no time but they still charge you 100. my point is you're paying for "expertise" in this instance, not necessarily time taken.

has anyone had it done by an indy and what did they pay ?
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      08-28-2014, 02:43 PM   #14
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We charge 25 plus vat for registration(Dealer)
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