Anton Yelchin -- Chrysler Had JUST Rolled Out Recall 'Fix'

A crucial repair to Anton Yelchin's Jeep -- that ultimately might have saved his life -- was made available to the public just days before his death ... TMZ has learned.

As we've told you ... Anton's Jeep Grand Cherokee Laredo was tagged for a recall in May. But we're told the manufacturer, Fiat Chrysler Automobiles, did not have an actual repair for the e-shifter problem at that point.

Sources with direct knowledge of the recall process tell us some Jeep dealerships just got the "fix" last week -- and according to documents, ALL dealerships should have it by August.

We're told the fix is a software download to install an "auto park" feature -- which will automatically shift the vehicle into PARK as soon as the driver's door opens.