Tiger Woods' car was a wreck when cops found him during his DUI arrest -- with 2 flat tires, a broken tail light and mangled bumpers ... this according to the police report obtained by TMZ Sports.
The officers at the scene reported, "Both rims on the drivers side of the vehicle are damaged and both tires on the drivers side are flat."
Tiger was behind the wheel of a 2015 Mercedes AMG S65 at the time of the incident -- repairing that kind of a car ain't cheap.
Cops noted the damage appeared to have been inflicted recently.