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One of the things noted on the PPI of my 2014 Roadster was an OEM battery.
I know these cars have super capacitors and if they become discharged all sorts of untoward events can happen.
With this in mind, I thought it was time to change a 7 year old battery, regardless of whether the car was acting up now, or not.
Also, I did not want to disconnect the battery from the car and leave the car unattached to a battery for any longer than needed, so I did not have a battery to bring with me and compare to batteries out in the wild.
Well, after much searching there were many conflicting reports, especially on here, saying that the car needed to be reprogrammed at Lamborghini etc.... and I had many questions.
I called Lamborghini for a part number and a battery group size. Well, all they could get me was a part number that was clearly marked on the battery.
I watched a couple of videos I was able to discern that the car needed either or a group 47 battery or HG5 battery.
Every place I went to Napa, Interstate Battery, etc.. (more on this later) did not recognize that battery size! Ugh. I spent the better part of a day driving between Audi and Volkswagen dealerships (My nearest Lamborghini Dealership is ~150 miles away) and I could not find a battery.
Well, one of the batteries that Audi brought out had an H6 sticker on it, and I remembered a video saying that an HG6 battery was too big! I decided try if an H6 was the same as an HG6 and ask for the dealer to see if they had an H5 battery! Alas, they looked at me like deer in headlights....
This solidifies my view of dealers- they may know a little more about the procedure to do stuff, but they are NOT smarter than me and, more importantly, they don't care about my car more that I do.
But I digress, a quick google search of "H5 AGM" battery showed a bunch of Autozone Stores that had a bunch in stock!! I probably drove by 5-6 of them on my travels!
I quickly drove over there and sure enough, the H5 battery size matched my size diagram and they had it in an AGM battery!!
Finding the battery was BY FAR the hardest part of changing the battery in my car.
So to sum up, the Aventador uses an H5 sized battery with AGM chemistry. This is also known as a Group 47 battery.
AGM means Absorbent Glass Mat-this helps reduce acid splashing about in a crash.
Now onto actually getting to the battery.
Myth: You need to take off the hood to be able to take out the tub.
Truth: It is a little tight at the front corners and the windshield washers.
There are 6 torx bolts on the front trim piece and 6 torx bolts that hold the trunk in and out comes the tub.
The tub rubs here:
![300061]()
These are the windshield washers that rub the tub as well. Just be careful moving the tub slowly.
![300062]()
My car has this boot release lever, it has 8 torx bolts that you can undo and just pass the handle through the hole in the tub.
![300063]()
I know these cars have super capacitors and if they become discharged all sorts of untoward events can happen.
With this in mind, I thought it was time to change a 7 year old battery, regardless of whether the car was acting up now, or not.
Also, I did not want to disconnect the battery from the car and leave the car unattached to a battery for any longer than needed, so I did not have a battery to bring with me and compare to batteries out in the wild.
Well, after much searching there were many conflicting reports, especially on here, saying that the car needed to be reprogrammed at Lamborghini etc.... and I had many questions.
I called Lamborghini for a part number and a battery group size. Well, all they could get me was a part number that was clearly marked on the battery.
I watched a couple of videos I was able to discern that the car needed either or a group 47 battery or HG5 battery.
Every place I went to Napa, Interstate Battery, etc.. (more on this later) did not recognize that battery size! Ugh. I spent the better part of a day driving between Audi and Volkswagen dealerships (My nearest Lamborghini Dealership is ~150 miles away) and I could not find a battery.
Well, one of the batteries that Audi brought out had an H6 sticker on it, and I remembered a video saying that an HG6 battery was too big! I decided try if an H6 was the same as an HG6 and ask for the dealer to see if they had an H5 battery! Alas, they looked at me like deer in headlights....
This solidifies my view of dealers- they may know a little more about the procedure to do stuff, but they are NOT smarter than me and, more importantly, they don't care about my car more that I do.
But I digress, a quick google search of "H5 AGM" battery showed a bunch of Autozone Stores that had a bunch in stock!! I probably drove by 5-6 of them on my travels!
I quickly drove over there and sure enough, the H5 battery size matched my size diagram and they had it in an AGM battery!!
Finding the battery was BY FAR the hardest part of changing the battery in my car.
So to sum up, the Aventador uses an H5 sized battery with AGM chemistry. This is also known as a Group 47 battery.
AGM means Absorbent Glass Mat-this helps reduce acid splashing about in a crash.
Now onto actually getting to the battery.
Myth: You need to take off the hood to be able to take out the tub.
Truth: It is a little tight at the front corners and the windshield washers.
There are 6 torx bolts on the front trim piece and 6 torx bolts that hold the trunk in and out comes the tub.
The tub rubs here:
These are the windshield washers that rub the tub as well. Just be careful moving the tub slowly.
My car has this boot release lever, it has 8 torx bolts that you can undo and just pass the handle through the hole in the tub.
