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E39 530i battery size

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E39 530i battery size

Postby 530dE60 » Thu, 03 May 2012 14:00:50 UTC

Hi all

Looks like I'll need to get a new battery. I've located two Bosch S5 batteries at euro car parts which I'm trying to choose between. One is 353mm long (CCA 830) and the other 393mm (CCA 920). If I follow their vehicle identifier on their website, it brings up a lower spec S3 battery which I've decided to ignore.

I think the correct length of the battery for the (non M5) E39 is 353mm / 14 inches. The current battery appears to be factory fitted but is actually shorter than 353mm/14''. I guess OEM batteries came in various/smaller sizes. And the CCA on it is only 620 or 670 I recall !

The 393mm/~15.5'' battery (which fits OK in an E39 M5 with its differently located battery) seems very good for the money. I'm just wondering if it'll fit fine on mine. The overall space seems large enough to allow it to drop in but its the securing clamp thing near the base which I'm not sure about. Would be very helpful if anyone can shed some light on this, especially if you've got the larger battery.
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Re: E39 530i battery size

Postby jimbob » Thu, 03 May 2012 15:41:58 UTC

thre is room in the battery bow to take longer battery thre is threeholes for the base clamp rougly half an inch apart
the thing is cold cranking amps are fine but you should also consider the ah rating its far more imprtant a smaller battery will do the job but not for very long i myself have just fitted a new battery to my e39 523i and went for one slightly bigger in capacity(ah rating)
you should also consider varta batteries they are german made and every bit as good if not better than the bosch unit
have alook at the battery guys \the battery store \or the battery megastore for some sound advice and good prices


kind regards jimbob.
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Re: E39 530i battery size

Postby Fox2 » Thu, 03 May 2012 19:01:04 UTC

My factory fit battery finally gave up at the weekend and the AA came out and fitted a new battery. There was some confusion because all the text on the label had rubbed off so he couldnt see what rating it was. His book recommended a type that was 393mm long but he was reluctant to fit this as the OEM battery was 353mm long. In the end, in went a 353mm battery which is rated at 64Ah.

It seems to work fine, but I'd be interested in whether it's actually the correct battery for the car or not.
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Re: E39 530i battery size

Postby jimbob » Thu, 03 May 2012 20:22:48 UTC

64ah rating is too small if its fitted to one of your cars on your profile need to be at least a 7o ah one i would find out what you have fitted it will work ok
but will struggle when the weather gets colder with more electrical load being put on it have alook at the battery megastore for size and ah rating or if you have your car hand book will tell you
kind regards jimbob.
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Re: E39 530i battery size

Postby 530dE60 » Thu, 03 May 2012 23:10:13 UTC

Many thanks for replies.

Battery 1 is 100Ah, 830CCA and 353mm long.

Battery 2 is 110Ah, 920CCA and 393mm long.

My current factory fit BMW battery is only 80Ah, 640CCA and around 315mm long.

@ jimbob- I see one unoccupied hole, the next is where the current ~315mm battery is held, the third I assume is hidden under the current battery to take an even short than current battery. So based on that, I've roughly figured visually that the final/third hole looks good only for the 353mm battery and not the extra long one at 393mm which may just slide into the bow but there won't be any room / hole for the clamp. Looks like I'll be going for the 353mm / 14'' (called group 49 size on the US E39s). And the 393mm one seems will only go in the M5.

Fox2 wrote:My factory fit battery finally gave up at the weekend and the AA came out and fitted a new battery. There was some confusion because all the text on the label had rubbed off so he couldnt see what rating it was. His book recommended a type that was 393mm long but he was reluctant to fit this as the OEM battery was 353mm long. In the end, in went a 353mm battery which is rated at 64Ah.

It seems to work fine, but I'd be interested in whether it's actually the correct battery for the car or not.


The size seems right but are you sure about that Ah ? Could be 640CCA and not Ah as 64Ah sounds too low. My current knackered OEM one says 640CCA and 80Ah and is surprisingly short at only ~315mm.

Battery 1 (353mm) above appears like a big improvement (CCA and Ah) on what I have right now. I was trying to see if I could squeeze in battery 2 (393mm) which may just go in but won't be secure.
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Re: E39 530i battery size

Postby antimony » Thu, 03 May 2012 23:51:25 UTC

Eurocarparts - Remember to add the voucher code BIMFOR25 at the online checkout for 25% off.
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Re: E39 530i battery size

Postby 530dE60 » Fri, 04 May 2012 00:18:56 UTC

Thanks...I'll try that. I only knew about BATTERY15 which only gives 15%.
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Re: E39 530i battery size

Postby jimbob » Fri, 04 May 2012 07:57:46 UTC

its the ah rating that is important dont get all confused with cold cranking amps if you are uprating to the 100 ah battery and it fits in securely then you will be fine i know size matters but with modern tech batteries have become smaller in size but pack a bigger punch due to the move away from lead acid to silver\calcium technology so for piece of mind and an upgrade just fit the biggest ah rated battery you can get into the hole and secure and you will be fine

kind regards jimbob,
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Re: E39 530i battery size

Postby 530dE60 » Fri, 04 May 2012 11:26:28 UTC

antimony wrote:Eurocarparts - Remember to add the voucher code BIMFOR25 at the online checkout for 25% off.


Can't thank you enough for that. Code works and all fixed up now.

Paid £84.55 only and the exact same battery is £129 in halFRAUDS :shock:.

Image

So it is the 353mm only which is the largest that can be secured and fitted properly as the clamp is on the final / third hole. 393mm one will slip in but no room to secure properly.

Well pleased - hopefully that's the end of the jump starts !
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Re: E39 530i battery size

Postby jimbob » Fri, 04 May 2012 12:28:15 UTC

glad its all sorted

kind regards jimbob.
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Re: E39 530i battery size

Postby Fox2 » Wed, 09 May 2012 22:54:11 UTC

jimbob wrote:64ah rating is too small if its fitted to one of your cars on your profile need to be at least a 7o ah one i would find out what you have fitted it will work ok
but will struggle when the weather gets colder with more electrical load being put on it have alook at the battery megastore for size and ah rating or if you have your car hand book will tell you
kind regards jimbob.


It's definately a 64Ah battery - it's in my E39 530i.

The whole episode was a bit of a drama really. As I said the sticker on the top had worn off so there was no indication of what the original battery (from new) was. The AA chaps book told him it needed a certain type of battery but he insisted the book was wrong as the battery it suggested was physically longer than the one fitted to my car from new. In the end he fitted the largest capacity battery he had that retained the original dimensions, so there I am with a 64Ah battery.

Checked in Halfords yesterday - using the book I looked up the correct code and there was the battery Halfords recommended - both a Bosch and Halfords own brand were again physically larger than the one removed from my car.

Not sure what I need to do next really, I don't want the wrong battery in the car. Where can I find in writing the correct specifications? It's not in my owners handbook.
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Re: E39 530i battery size

Postby 530dE60 » Wed, 09 May 2012 23:13:05 UTC

At 64Ah I am convinced that's not a rating BMW would have put in a 5 series.

You can find the recommended amp/hour from a number of different places, including BMW themselves. Clearly the AA man was too fixated on his book which only gave him the 353mm and 393mm. He's right that the larger (presumably 393mm one) is too long to fit but that doesn't mean the correct one (353mm long) is ONLY available in one capacity size (64Ah). I guess the 353mm battery size is available in a whole range of amp/hour from various manufacturers.

Can you not phone AA and tell them to come out and put the correct battery in ? What did you pay for the AA battery ?

The £84.55 I paid for mine is an absolute steal at that price for what it is (100Ah/830CCA). People are happily paying £129 for the same thing in Halfords :shock:.
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Re: E39 530i battery size

Postby Fox2 » Wed, 09 May 2012 23:27:06 UTC

I didn't pay for it as I have breakdown repair cover on my AA policy - so they paid for it. Part of the issue is that he was insistent it must be 'like for like' and that the bigger one wasn't 'like for like'.

Like you I am pretty sure its not the correct battery. I guess I need something in writing that I can send to the AA to support this and get them to replace it.... but what? And what *should* be fitted there?
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Re: E39 530i battery size

Postby 530dE60 » Wed, 09 May 2012 23:45:03 UTC

When the label on the old one was rubbed off, how could AA man be sure of the rating of the current one and then attempt to enforce the like for like crap :salp head:. Honestly, sillyness like this really make me wanna :brucelee:.

Anyway, shouldn't be difficult for you, just go in or phone your local BMW $tealer's parts depatment and ask the parts man what exactly the car came with when it rolled off the production line (or just simply what is needed for an E39 530i). I bet it isn't 64Ah. I'm no battery expert but I have a feeling wife's Micra's probably got a smallish battery around that sort of rating.

Turned out that the short battery that was knackered on mine actually wasn't the one the car left the factory with. It was a BMW one that a previous owner probably tried to save a few quid on :roll: . Size was around 315mm and the securing clamp was on the middle hole. Even that had 80Ah and 640CCA.
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Re: E39 530i battery size

Postby jimbob » Thu, 10 May 2012 07:46:35 UTC

with modern cars the size of the battery is no indication to the power output in my hand book it states

bmw 520i 523i 528i 70amp\h

bmw535i 54oi 90amp\h

bmw525td\tds 530d 95amph

these are the sizes fitted to the e39 my car is a e39 2ooo preface lift model
having just replaced the battery i can confirm the one fitted was a 90amp\h
the one fitted now is a 100amp\h
so to answer your question your car has the wrong battery fitted i would contact the aa and get the correct one fitted

kind regards jimbob.
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Re: E39 530i battery size

Postby Fox2 » Thu, 10 May 2012 08:26:50 UTC

I'm going to do that but they'll presumably want some sort of proof its incorrect. My handbook doesn't state the correct battery size.
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Re: E39 530i battery size

Postby 530dE60 » Thu, 10 May 2012 08:37:53 UTC

Don't worry too much about proof in writing and stuff like that. Just contact and explain and say all your mates with 530i E39s all have above 80Ah batteries and that AA man only had the WRONG battery at that time. Take it from there and I doubt very much they'll actually make you give it in writing.

Don't forget, over the years, the AA have probably fitted several thousand) E39 530i's with new batteries . They surely know and/or have a record of what battery is supposed to goes in the 530i. 64Ah sounds like AA man got it totally off the mark...ask them to just sort it out.
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Re: E39 530i battery size

Postby Fox2 » Sat, 12 May 2012 18:03:03 UTC

Have just checked one of the other cars, the Z4. It has the same M54B30 engine as my 530i and has a 570CCA, 70Ah battery. The one fitted by the AA is also a 570 but a 64Ah.

I'm not sure I fully understand what the Ah bit relates to. I understand it's Amp Hours, but what is the issue with it being 6 less?
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Re: E39 530i battery size

Postby jimbob » Sat, 12 May 2012 18:32:13 UTC

the higher the amp\hr figure the more power the battery has the cca figure is only the amount of amps aailable for an initial cold start


The amp-hour rating of a battery (also known as "AH") is a measure of how many amps a battery can supply for a period of time. It is calculated using the formula Amps X Hours. For instance, in the ideal world, this rating would mean that if you have a 33AH 12 Volt battery, you should be able to supply 33 Amps (~412 Watts) out of it for 1 hour, or 16.5 Amps (~206 Watts) for 2 hours, or 8.25 Amps (~100 Watts) for 4 hours, etc. Unfortunately we don't live in the ideal world, so the values above are not spot on. It turns out that your battery has more Amp Hour capacity when you use it at lower Wattage and Amperage levels. So the values above are just very rough guidelines. Each manufacturer may calculate Amp hours differently which is to say they may manipulate the test to get themselves a very high Amp Hour rating which can mislead people like you and me. One common Amp Hour rating is based on using 20 hour time period where at the beginning of the test the battery is 100% charged


hope this helps explain it

kind regards jimbob.
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Re: E39 530i battery size

Postby Fox2 » Sat, 12 May 2012 19:11:16 UTC

Cool, thats very useful.

It has left me thinking I want a battery with more than 64Ah. It sounds like from your description above it would be easier to flatten this one after a days cleaning with the radio on, etc?
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