Battery replacement programming

[NewSupraOwner]

Has anyone tried to replace the battery themselves? Can someone who has reprogrammed themselves after battery swap reply?

Backstory:
Dealer is telling me that unless the battery is reprogrammed during installation, the ECU is going to think the new battery is the old one and too much voltage will get sent to the new battery, frying it. That just can't be right on so many levels. I can't believe that the ECU is both that deeply involved in regulating the battery and that it's also that stupidly programmed to not recognize different battery characteristics and adjust.

What I can believe is that I might get the "check/replace battery" message and that would need to be reset, but the idea that a new battery is going to get fried if the ECU isn't immediately reprogrammed makes no electrical, mechanical, or common sense.

Anyway, my battery is completely dead, and a jump won't start the car. My thought was to put the new battery in and drive it to the dealer (less than a mile away) if I can't get it reprogrammed myself to have them do whatever fiddling they need to. I just don't buy that I have to get it towed to replace a battery.

Thoughts?

EDIT: This thread and a Supra trained tech helped convince me that battery registration is required. It's a way to optimize power draw over time to prolong battery life. Learned a ton, registered my battery myself.

https://www.supramkv.com/threads/battery.3260/

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[J29DB03]

OBD adapter and BimmerLink.

 

[NewSupraOwner]

OBD adapter and BimmerLink.

Thanks -- yeah, adapter arrives tomorrow. Any BimmerLink steps?

 

[J29DB03]

Thanks -- yeah, adapter arrives tomorrow. Any BimmerLink steps?

Unfortunately no, I haven’t done the battery replacement. But I have used it to reset my oil service and it was very easy. Can’t imagine it would be any different for the battery. That app will be some of the best money you can spend for this car.

 

[NewSupraOwner]

Unfortunately no, I haven’t done the battery replacement. But I have used it to reset my oil service and it was very easy. Can’t imagine it would be any different for the battery. That app will be some of the best money you can spend for this car.

Thanks! That's my hope.

 

[A90.C]

Thanks -- yeah, adapter arrives tomorrow. Any BimmerLink steps?

Just open Bimmerlink, select battery, and at the bottom of the page it will have a button to register new battery. Simple as that.

 

[Loco38SUP]

You must do this to ensure your charging system is properly charging your new battery.

1st - Use Bimmercode to select the correct battery type and amp rating.

2nd- Use Bimmerlink to register the new battery.

If you dont find the exact amp rating in Bimmercode select the closest available.

FYI - if your new battery is identical in type and amp rating, you can skip step 1 and go straight to registration.

-RJM

 

[Xproplayer]

You must do this to ensure your charging system is properly charging your new battery.

1st - Use Bimmercode to select the correct battery type and amp rating.

2nd- Use Bimmerlink to register the new battery.

If you dont find the exact amp rating in Bimmercode select the closest available.

-RJM

And what if the battery specs don't change?

 

[NewSupraOwner]

You must do this to ensure your charging system is properly charging your new battery.

1st - Use Bimmercode to select the correct battery type and amp rating.

2nd- Use Bimmerlink to register the new battery.

If you dont find the exact amp rating in Bimmercode select the closest available.

-RJM

Awesome, this sounds really straightforward. Any gotchas/things to watch out for?

Thank you!

 

[Loco38SUP]

Awesome, this sounds really straightforward. Any gotchas/things to watch out for?

Thank you!

Its pretty strait forward, first code then register.

-RJM

 

[NewSupraOwner]

Its pretty strait forward, first code then register.

-RJM

Great, thanks again! I'm a complete Bimmer* beginner -- I'll be looking at docs later tonight, and if you had any basic slightly more detailed tips/instructions, that would be great. If not, no problem either -- thanks again for the help!

 

[Loco38SUP]

Great, thanks again! I'm a complete Bimmer* beginner -- I'll be looking at docs later tonight, and if you had any basic slightly more detailed tips/instructions, that would be great. If not, no problem either -- thanks again for the help!

FYI - if your new battery is identical in type and amp rating, you can skip step 1 and go straight to registration.

Here is my OEM battery for reference.

-RJM

 

[NewSupraOwner]

FYI - if your new battery is identical in type and amp rating, you can skip step 1 and go straight to registration.

Here is my OEM battery for reference.

-RJM

Got it, thanks! It's a Toyota TrueStart battery 00544-H9AGM-TS) that has a "Made in Germany" sticker on it and not much else Dealer indicated it's the one for my car.

Found a Toyota TrueStart battery spec sheet for it: 950 CCA, 105AH which looks identical to the BMW battery, but it only lists those two specs.

Sounds like I can just register the battery, then?

 

[Loco38SUP]

Got it, thanks! It's a Toyota TrueStart battery 00544-H9AGM-TS) that has a "Made in Germany" sticker on it and not much else Dealer indicated it's the one for my car.

Found a Toyota TrueStart battery spec sheet for it: 950 CCA, 105AH which looks identical to the BMW battery, but it only lists those two specs.

Sounds like I can just register the battery, then?

Yes, you’re good to proceed with only registering it. The Toyota version is an AGM type rated to 105 AH.

-RJM

 

[NewSupraOwner]

Yes, you’re good to proceed with only registering it. The Toyota version is an AGM type rated to 105 AH.

-RJM

Awesome, thanks again for the help!

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