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Hey all!

I'm new to this forum (obviously). I appreciate all of the information you guys provide to each other. It's a wonderful wealth of knowledge for a subject on which not many people are sharing!

So my issue today is that EV mode is not kicking in. At all.

I've checked off the list of common causes, such as the defroster, the A/C, the outside temp (mid to low 90's Fahrenheit at the moment), and everything as far as that goes checked out. Defroster is not on. A/C is off. Outside temp is within operating range.

The only thing I can figure is that it's the 12V Auxiliary Battery (passenger side under the hood).

That being said, I called the dealership to ask them what the price would be to replace this item (since, apparently, it's not covered on the 10yr warranty and I'm out of my new car warranty).

They're saying itS $700.00, plus tax and install, which would bring it to $800.00. :icon_cry: I mean, seriously. That's absurd for a battery that's smaller even than a regular car's battery.

I can't find ANY information on what battery would be a suitable replacement for it. Does anybody know?

Any help would be much appreciated, as even the dealership was stumped about finding a model number I could shop for.

Thanks so much for any help,
ivegotaname

tldr; Auxiliary 12v engine restart battery is expensive. Anybody know of a suitable replacement?
 

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Here is what I found for the hybrid. Sorry the image is small but it says.

12v auxilliary battery 55D23L (12V-48AH)
12v engine restart batttery N-55R (12V-41AH)

So if you do a google search for 55D23L is shows a lot of compatible batteries. Good luck.

auxbattery.JPG
 

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Sorry to resurrect this thread (although it's not that old) but someone referenced this in another thread and I wanted to clear this up for sake of posterity... so as not to confuse some future person who may be reading this...

The "auxiliary battery" is NOT the one on the passenger side. The "engine restart battery" is the one you are looking for.

The "auxiliary battery" is the one on the driver's side and is just a regular run-of-the-mill battery.

See below...


Now that that is out of the way, I'm curious if you have any updates on this?

Assuming the dealership was correctly interpreting what you were talking about, it seems odd that the engine restart battery would be quoted at $700 for just the part. Googling "N-55R battery" gave some results in the ~100 range on some weird foreign sites. I don't know how to determine what would be an equivalent replacement for it, but there must be something readily available out there. Start/Stop is a fairly common feature these days. $700 just seems absurd.

As for the part about it not being covered by the 10-year hybrid warranty, that is absurd but apparently true...


The only reason I can guess for this not being covered is because globally-speaking, it is not exclusive to the hybrid. I believe in other countries, they do offer the start/stop functionality on non-hybrid models. That still seems like a stretch though... The warranty terms don't apply globally, they are market-specific. So since here in the US the start-stop battery is exclusive to the hybrid, it seems like it should be covered by the hybrid warranty. That's some BS as far as I'm concerned. Fortunately though, I'm still fairly confiend that having to pay for this out of pocket should not cost $700+tax and installation. Something seems wrong there. I'm very curious to find out how this all turned out.
 

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I too would like to know how this scenario turned out, we considered a Hybrid ( albeit briefly) before coming to our senses and purchasing our 2015 gas model.

Troutbum
 
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For anyone reading this that might be looking for a replacement for the $700 restart battery I seemed to have found a solution. If you read my thread you can see why I'm in this position but I basically determined that it wasn't the alternator but the restart battery. Very disappointing that Subaru wants around $800 for this battery but I went to the local Batteries Plus Bulbs store and they set me up. If readers are not familiar Batteries Plus is a nationwide chain that is expert in batteries and apparently light bulbs. you can even look at their website and order the battery to pick up in a store. they sold me the same battery for that they sell for the Prius. It was the exact same size as the one in my Subaru and the terminals were exact and everything. Best of all it was only $230 instead of $700 and it came with a 3 year warranty instead of a 1 year like the Subaru $700 special. I think it was the Duracell ultra AGM battery.
 

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For anyone reading this that might be looking for a replacement for the $700 restart battery I seemed to have found a solution. If you read my thread you can see why I'm in this position but I basically determined that it wasn't the alternator but the restart battery. Very disappointing that Subaru wants around $800 for this battery but I went to the local Batteries Plus Bulbs store and they set me up. If readers are not familiar Batteries Plus is a nationwide chain that is expert in batteries and apparently light bulbs. you can even look at their website and order the battery to pick up in a store. they sold me the same battery for that they sell for the Prius. It was the exact same size as the one in my Subaru and the terminals were exact and everything. Best of all it was only $230 instead of $700 and it came with a 3 year warranty instead of a 1 year like the Subaru $700 special. I think it was the Duracell ultra AGM battery.
Excellent!

Can you post the model of the battery for other members in the same position?
 
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Excellent!

Can you post the model of the battery for other members in the same position?
Sure thing. It's SLI51PAGM, Duracell ultra, the format is BCI Group S46B24R. important to note is if you try to search the Batteries plus Bulbs website for a Crosstrek hybrid battery it doesn't come up. They just don't allow a search for the Crosstrek hybrid. and if you call them they'll say they don't have a restart battery for Crosstrek hybrids. But you can find the battery by searching for 2016 Toyota Prius and they give a 10 percent discount if you order on line for store pickup.
 

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Too bad it's a group 46 battery....I put a group 47 size AGM battery in my smart....The characteristic of both of these batteries are similar , just a slight difference in size....
I'm going to have to play with this when our weather gets nicer.
 

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Here's a shocking discovery....The stock Subaru Aux battery is only 380 CCA?? What the heck...No wonder my car has a tough time turning over the engine on a colder day..
 

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Here's a shocking discovery....The stock Subaru Aux battery is only 380 CCA?? What the heck...No wonder my car has a tough time turning over the engine on a colder day..
If it's using the same battery as the gas version, then it should be 390 CCA. Since you have had the car for a few years, it's not how much the battery is rated at that matters now, it's how much it puts out that matters now. All batteries as they age will loose some CCA as well as capacity much of it depends on how the battery has been treated since it was new - ie. has it been through a deep discharge, physical damage due to a very rough ride or never maintained (even for most 'maintenance free' battery, maintenance is needed for long life)?

Take the car in to almost any place that sells batteries and get a load test done to check how much CCA it has left.
 

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If it's using the same battery as the gas version, then it should be 390 CCA. Since you have had the car for a few years, it's not how much the battery is rated at that matters now, it's how much it puts out that matters now. All batteries as they age will loose some CCA as well as capacity much of it depends on how the battery has been treated since it was new - ie. has it been through a deep discharge, physical damage due to a very rough ride or never maintained (even for most 'maintenance free' battery, maintenance is needed for long life)?

Take the car in to almost any place that sells batteries and get a load test done to check how much CCA it has left.
The car is under warranty still and going to see the dealer the end of this week.
 

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Thank you for posting this information. I've been doing a slow burn ever since I found out about this issue a few months ago and not getting any answers from dealerships. There are several Batteris Plus stores in my area. You just made my day! :rock: It's also really nice to hear that Subaru took care of your bill for the misdiagnosis.
 

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Thank you for posting this information. I've been doing a slow burn ever since I found out about this issue a few months ago and not getting any answers from dealerships. There are several Batteris Plus stores in my area. You just made my day! :rock: It's also really nice to hear that Subaru took care of your bill for the misdiagnosis.
Yea it's good to finally have a definitive answer on the group number of the start/stop battery.

I couldn't even get a straight answer from SOA so this is good information to hang onto.
 

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Yes, glad there is an answer to that, but my happiness was short-lived. Then I started reading about people having problems with the hybrid alternator, which sounds even more expensive than the battery. :excl:
 

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Yes, glad there is an answer to that, but my happiness was short-lived. Then I started reading about people having problems with the hybrid alternator, which sounds even more expensive than the battery. :excl:
Seeing the level of confusion with the batteries, I would not be surprised if the alternator is really a non-issue and that people are confusing a battery issue with an alternator issue.
 

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Yes, glad there is an answer to that, but my happiness was short-lived. Then I started reading about people having problems with the hybrid alternator, which sounds even more expensive than the battery. :excl:
Seeing the level of confusion with the batteries, I would not be surprised if the alternator is really a non-issue and that people are confusing a battery issue with an alternator issue.
What rlouie said.

I haven't seen a post on here where somebody legitimately had an alternator problem. Sure, a few people have had them replaced by mechanics blindly following the fault code, but those all ultimately came down to a bad battery (all the ones I've seen at least).
 

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This thread was kind of hard to find and but it just saved me over $500. I think a better title for this thread would be "EV mode quit working? Read this thread and save yourself time and money". Thanks to everyone.
I used a battery from ebay search Deka 9A51P. $169 with free shipping.
 

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Discussion Starter #19
Oh geez! I just noticed all of the replies on this thread. Sorry for the super, super, super super late response to it. I wound up going with the Duracell option, found at Batteries Plus Bulbs. It cost me $215, installed.

I have to say, the car even starts off of a stop better than it did when I first got it. I'm seriously happy I saved the money.

Subaru wound up quoting me $880 to get the new start-stop battery installed.

Then, when I had the start-stop battery installed and the Check Engine light remained on, the dealership wanted to charge $60 to reset it. Autozone let me use their socket set, and I fixed it by unplugging both batteries. It took me 2 minutes.

I'm severely disappointed in Subaru for this display of gouging and bad customer service. But hey, better options are out there! And they work FABULOUSLY.

Thanks all for your responses, many apologies for getting back so late.
 

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