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Battery Replacement - DIY or Dealer?

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Old Aug 6, 2024 | 05:32 AM
  #226  
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After getting many reports of strange transient warning lights from the wife, I replaced our original battery with an AGM from Costco. No trouble since.

I wasn't a fan of having to remove trim in order to replace the battery, but all cars are like that now. At least the re-installation was smooth and I got to do a little bit of cleaning.
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Old Aug 6, 2024 | 12:00 PM
  #227  
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Just replaced mine today. Went with a Group 24F - EFB (Enhanced Flooded Battery). I fabricated a 14 gauge wire and alligator clip (both ends) setup, with a fuse inline. Used a donor 12V auto battery that I already had on hand. Worked well. No memory losses or weird issues. It's a bit awkward moving battery cables around with the jumper leads attached during the "surgery", but it's very doable.
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Old Aug 6, 2024 | 12:07 PM
  #228  
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Originally Posted by Hubs
After getting many reports of strange transient warning lights from the wife, I replaced our original battery with an AGM from Costco. No trouble since.

I wasn't a fan of having to remove trim in order to replace the battery, but all cars are like that now. At least the re-installation was smooth and I got to do a little bit of cleaning.
Curious, what trim did you have to remove to replace the battery? Was this on a 4th Gen RX350?
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Old Aug 6, 2024 | 01:38 PM
  #229  
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Originally Posted by Hubs
After getting many reports of strange transient warning lights from the wife, I replaced our original battery with an AGM from Costco. No trouble since.

I wasn't a fan of having to remove trim in order to replace the battery, but all cars are like that now. At least the re-installation was smooth and I got to do a little bit of cleaning.
Is this "trim" in reference to a 4th generation Lexus RX 350 12 volt battery ? Please show photos of this trim you had to remove.

I replaced my battery in a 2017 RX and did not see any trim or any obstacles of any kind. The old battery came out and the new one went in. A 5 minute project.

Last edited by jcg0324; Aug 6, 2024 at 03:51 PM. Reason: added words
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Old Aug 8, 2024 | 08:19 AM
  #230  
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Originally Posted by BenchTest
Just replaced mine today. Went with a Group 24F - EFB (Enhanced Flooded Battery). I fabricated a 14 gauge wire and alligator clip (both ends) setup, with a fuse inline. Used a donor 12V auto battery that I already had on hand. Worked well. No memory losses or weird issues. It's a bit awkward moving battery cables around with the jumper leads attached during the "surgery", but it's very doable.
When changing batteries, I've found it easiest to just connect my (powered) Battery Tender cables to the 2 battery leads that are removed. This way there is no need to hurry with the new battery installation.
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Old Aug 8, 2024 | 08:42 AM
  #231  
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Originally Posted by sderman
When changing batteries, I've found it easiest to just connect my (powered) Battery Tender cables to the 2 battery leads that are removed. This way there is no need to hurry with the new battery installation.
So, you're doing the same operation as me, except you are using a battery tender vs. an actual battery.
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Old Aug 8, 2024 | 09:42 AM
  #232  
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Originally Posted by BenchTest
Curious, what trim did you have to remove to replace the battery? Was this on a 4th Gen RX350?
It not really a trim, but it's a cover (black). The black cover is covering the radiator and condenser. Don't know the exact name. It is covering the battery a bit. So removing it gives you a better access to the battery.
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Old Aug 8, 2024 | 11:08 AM
  #233  
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Originally Posted by GS4_Fiend
It not really a trim, but it's a cover (black). The black cover is covering the radiator and condenser. Don't know the exact name. It is covering the battery a bit. So removing it gives you a better access to the battery.
Interesting. I didn't experience that on mine. I just needed to remove the battery hold down, remove cables, and it was out. There was an access hole in the cover for the forward hold down bolt that made it easy to do.
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Old Aug 8, 2024 | 08:19 PM
  #234  
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Originally Posted by BenchTest
So, you're doing the same operation as me, except you are using a battery tender vs. an actual battery.
Yep, just less cumbersome since the unit can just sit on the engine and the cables are very flexible. I assume everyone has some sort of a battery tender to use during vacations with so many Lexuses having parasitic battery drain issues.
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Old Aug 9, 2024 | 04:10 AM
  #235  
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Originally Posted by sderman
Yep, just less cumbersome since the unit can just sit on the engine and the cables are very flexible. I assume everyone has some sort of a battery tender to use during vacations with so many Lexuses having parasitic battery drain issues.
My 12v SAE cable setup for my battery minder without opening the hood. Convenient.





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Old Aug 9, 2024 | 12:12 PM
  #236  
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I have mine exiting from under the rear of the hood, positioned between the 2 wipers, and just barely sticking out so it's not noticeable.

Last edited by kitlz; Aug 9, 2024 at 01:02 PM.
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Old Aug 9, 2024 | 12:56 PM
  #237  
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Originally Posted by sderman
I have mine exiting from under the rear of the hood, positioned between the 2 wipers, and just barely sticking out so it's not noticeable.
Mom taught me not to drive around looking that. I just tuck it under the front license plate and out of sight the malcontents who want to act upon their malicious intent.

Last edited by monju0525; Aug 9, 2024 at 01:09 PM.
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Old Aug 9, 2024 | 04:11 PM
  #238  
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Originally Posted by monju0525
Mom taught me not to drive around looking that. I just tuck it under the front license plate and out of sight the malcontents who want to act upon their malicious intent.
Considering the common parasitic battery drain, Lexus should install as standard a trickle charger with wireless charging. Or perhaps a tiny under-the -hood gas-driven generator that turns on when the battery voltage drops.
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Old Aug 9, 2024 | 04:54 PM
  #239  
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Let's all hold our breath on that one.

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Old Aug 9, 2024 | 05:52 PM
  #240  
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The 12V SAE cable has a 15amp in-line fuse which definitely trumps the wireless charger scenario. The SAE is designed to handle freezing and harsh conditions.

https://a.co/d/2J6LRMD
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