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My battery died. Should I buy a new battery from a BMW dealer or will an "ordinary" battery from Sears and the like be alright? Advice please.
 

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Don't buy from the dealer if you have an E46. You don't say what year or model your car is and that makes a difference because convertibles will take a different size battery. Learn to use the search function to read up on battery fitment and replacement procedures. Most will just get the proper sized battery from Walmart or Cosco and will work just fine.
 

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E46 start using AGM battery, although that is optional. You can get a used BMW, Benz, Volvo battery, or new Bosch, Excite that is group 95R. The battery compartment is pretty large, so it can tolerate a bigger size battery, if that is the best used battery you can find.

As an old car, it is not cost justify to use original BMW battery that cost $500 - $900
 

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I should have added that my E46 is a 1999 four-door sedan with 323k miles. I have kept it in very good condition and am willing to spend what it takes to get a proper battery. If a Sears or other mass retailer battery will work, I will buy one. I My very trustworthy BMW independent mechanic is off until after the New Year so my car is dead in the water until then unless I act on my own. I am told that there needs to be some kind of electrical meshing of a new battery with the car's electrical system. Is this true?
 

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the people’s mod
2004 330Ci 115k miles
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I am told that there needs to be some kind of electrical meshing of a new battery with the car's electrical system. Is this true?
No, not for E46; only for newer BMWs.

Just buy a regular car battery and install it yourself. The important aspects are the physical size (so it fits), the location of the terminals (to connect to the cables), and the cold cranking amps (CCA).
 

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don't buy a used battery , buy a new one , these are not exceptionaly expensive , and at least in Greece where I am , a Bocsch S5 (S5008) (77AH and 780A) that meets or exceeds the requirements unless you have a convertible is about 80 euros and comes with a 5 year warranty
 

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don't buy a used battery , buy a new one , these are not exceptionaly expensive , and at least in Greece where I am , a Bocsch S5 (S5008) (77AH and 780A) that meets or exceeds the requirements unless you have a convertible is about 80 euros and comes with a 5 year warranty
I just put a new one in my car, 760CCA from Advance Auto. H6AGM $176.99 but had a 25% off coupon code. Slightly smaller than the one I put in 5 1/2yrs ago but not enough to be concerned about. shop.advanceautoparts.com/p/autocraft-platinum-agm-battery-group-size-h6-760-cca-h6-agm/10210829-P?navigationPath=L1*14920%7


Sent from my [device_name] using E46Fanatics mobile app
 

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BMW battery is the best battery. Mine was 11 years old when I changed it in 2014, and it was still working great, just changed it do to age. My 3 year old duralast needed a jump if it sat more than a day.

Just get a cheap auto store one, as it***8217;s not logical to get a bmw one when you bought your car for $1500
 

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You've gotten lots of good options, and they're all correct in noting that you do not need the BMW branded battery - just the correct size.

You might already know this, but please be sure to attach the Vent Tube to the battery when you install it. Many (most/all ?) batteries come with a venting adapter when you buy one. Because your battery is in the trunk, this adapter should be plugged into the battery case/cap and then attached to the vent tube in your car. Chances of a battery explosion (caused by hydrogen gas under some circumstances) are slim, but not zero, so you'll want to use this safety feature built into your car.

Mariner05
 

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Battery

I have a 2001 e46. I think around 2008, I went to the BMW dealership and bought a battery and changed it myself. Think it was about $150?

Then 2012, same thing. Went to dealership... Think i paid about $150 for OEM battery.

Today, had to replace battery... Now I see there are these AGM batteries... Called Parts at dealership and they quoted me for $394. said the old flooded batteries, they don't make/stock anymore...

Had me shopping around. Usually get my batteries for my cars at O'Reily's. $220.
Found one at Pep Boys, with 30% off for ordering online... paid $160 for a Bosch https://www.pepboys.com/product/det...X%2Fxi%2FCi/0/6-2494%202.5L%20DOHC?quantity=1
 

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// Quandt AG (Retired) //
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Balidawg was absolutely correct several posts above! Note: AGM batteries are not intended or suggested as a replacement for the e46 nor the e9x. Also to correct some misinformation the BMW IBS module (Intelligent Battery System) does not need re-programmed if you swap a new battery of the same specification - been there and done it.

Pasted from the Official Battery Thread:

I see a lot of discussion on here about various brands. Be aware that the battery sold by Walmart (everstart brand) is made by the same parent company (Johnson controls) as the Varta battery that was OE BMW (Varta was owned by BMW owners). Varta also make AGM batteries but have not recommended that for our e46. You can check that out at their Europe vehicle battery finder.

https://www.varta-automotive.com/en...078|574+012+068|&rec_etn=574+012+068|&ss_etn=


Point of my post is Varta ( now Johnson controls) make batteries for many brands so when you buy that Walmart or Interstate battery you are getting the "black line" but it is the same manufacturer (yes Johnson make Interstate batteries too). Typically the black line meets the minimum spec (cca) for the intended vehicle.

I worked for the Quandts and buy the other brands knowing I'm still getting a Varta battery, just not at BMW prices. Same thing for my Aston Martin. My Walmart battery for $180 has the same plastic moulding lines and is exact to the battery replaced. It should be - it was made in the same factory by same folk, only when they put the sticky label on it for retail sale it was priced at 1/3 the cost the Aston Martin dealer sells it at.

Just find it funny when I see the debates over brands - when the only real difference is sometimes the plastic colour used, the label and marketing approach. The AGM battery made by Varta for BMW, Audi and MB was intended for the Start/Stop Cars.
 

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What is the logic of not using AGM for the e46 ?
AGM did not exist when E46 was made, that's the only reason it's not OEM.
In the end, it's a 12V DC battery, so of course you can use it in an E46.
 

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What is the logic of not using AGM for the e46 ?
AGM did not exist when E46 was made, that's the only reason it's not OEM.
In the end, it's a 12V DC battery, so of course you can use it in an E46.


What he said. I have had one in my e46 for several years.

Since many e46s are not daily drivers, an AGM makes sense as it will withstand inactivity better than a flooded cell battery.

Plus:
https://www.pepboys.com/car_care_corner/car_care_basics/maintenance/advantages_of_agm/
 

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Not here to debate anyone, just adding another data point. 4 years, 43k-mile H8 AGM in my 03 coupe. Fit perfect, reasonably priced at $180 and the biggest battery I could fit in the tray. Vent tube location and size identical to OE and even fit the plastic safety cap on the positive terminal. In a couple years I will most likely get another:

<img src="https://farm8.staticflickr.com/7315/11491606466_8b44aba71e_z.jpg" width="640" height="480" alt="Untitled">
 

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// Quandt AG (Retired) //
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I think you missed the point of my post. Of course an AGM will work - it's a DC 12v battery - it not being "Recommended" means it is not a requirement and was not OE. e46's are not fussy - I've used two 12v UPS batteries to start one of my e46's once in a pinch.

The point of my post was to support that the Walmart H8 battery and indeed the Everstart and Interstate lines are made at the same location by the same people and the same equipment as the battery you find at the BMW Dealer. And also even with the new IBS system it is not a requirement to buy a dealer battery or in fact have to program it to the module.
 

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. The point of my post was to support that the Walmart H8 battery and indeed the Everstart and Interstate lines are made at the same location by the same people and the same equipment as the battery you find at the BMW Dealer. And also even with the new IBS system it is not a requirement to buy a dealer battery or in fact have to program it to the module.
True to some extent, BUT!!!

So in theory if you replace the battery with the same type in the newer models that have IBS you may not need to "re-register" the replacement battery.

BUT, like anything many of the newer batteries are of a different design and often have different A/H ratings. I ran into this with my 2008 E70 X5. The non BMW replacement battery was like 15 A/H higher in rating that my OE battery. But the problem was compounded by the fact the aftermarket battery did not even list the A/H rating and while

I had MANY tools at hand to try and properly "register" the new battery. The problem was some tools wanted info from the "BMW" battery bar code which I did not have. Some of the tools only offered the A/H rating of the original OE battery and were rigid and did not give the end user the option to program or select the proper A/H rating.

Turns out many of the tools are too rigid and will not allow a "variable" to be entered for the A/H rating!!! So when the battery capacities change from what was originally offered 10+ years prior, it becomes a problem. So luckily I worked with Carly of all people to work out a solution, they added the larger A/H rating battery, but it would have been better if they would have given the end user the ability to adjust the value manually as needed.

I am not 100% sure because I did not care to spend more time that I already had on this IBS/Battery Registration issue, but I recall the the battery replacement is somehow logged in the vehicle with Mileage for reference, the number of batteries replaced and I think the IBS system is supposed to somehow adjust for battery aging??

Do all of the IBS functions really matter and work like they should?? Who knows, but in find BMW style, they F'ed up BIG TIME on the early E70's. I can remove the alternator belt from my E70 X5 and I will NEVER get any indication that the charging system is not working!!! How is this for an over engineered vehicle!!! Yes, this is true, it has happened to me, the only way you have any idea that there is a problems is when the vehicle starts to shed loads and you start to figure out WTF is happening. First the All Wheel Drive system is disabled, then the Active Suspension, then the ABS and so forth!!! You will be notified when each sub system shuts down, bot not why and no indication that the charging Voltage is non existent. I would have been stranded if it was not more my micro jump start battery that is actually the size of a VHS tape if anyone is old enough to know what a VHS tape is!

Just another major software/firmware bug in BMW's excessive electronics. No different than the Ignition Timing Map problem which I highly suspect if also part of my 4.8l V8 in my X5. At some point I will likely have the dealer fully update all of the modules in my vehicle, but at $300, it is not been a huge priority. I am really interested to see of the update resolves the fact the vehicle will NEVER make you aware that the alternator is not charging, but I can sit and listen to the radio with the engine off and if the battery starts to get low you will be notified that the battery is low and you should start the engine. :facepalm:
 
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