@JeffKeryk
This whole thread is confusing me and ok, that can happen. But Jeff posts a photo of his battery which is lithium ion not lead acid... and nothing can replace it but the same. So why the discussion about lead acid?
If 2008 Model 3s came with lead acid, Jeff is an exception because based on that photo he provided it is lithium ... or I am just crazy and well maybe an argument can be made for that but .. he doesnt have a lead acid based on that photo and its not going to be the price he got quoted unless he downgrades to lead acid.
https://shop.teslarati.com/collecti...tesla-model-3-12v-battery-replacement-lithium
Ok, as another pointed out above, I think maybe Jeff used an internet photo and that is not an actual photo of the battery in his car which is
NOT lead acid even though it may look like one to some.
@Vercingetorix is correct.
So back to Jeffs question he would be best off to replace the battery with whatever is in the vehicle and not over think it, it could lead to errors ... most likely wont but the question would remain, why? Both batteries have advantages and disadvantages though AGM on face value has less disadvantages, AGM is a buzz word that people think is the end all of a good lead acid, that thinking is incorrect for some applications.
Tesla decided flooded was better for that application so why mess with it?
Also flooded is a misnomer in todays world, lets call it advanced lead acid.