The 19-year-old reality star surprised the 26-year-old rapper with a $300,000 Bentley Bentayga after his Ferrari was reportedly repossessed the day before.
TMZ had reported Tuesday that Tyga was at the Bentley dealership with Jenner when his car was taken away. Jenner later said she was alone at the dealership while documenting the surprise on Snapchat.
"I had to lie to T and say, 'I have no idea, T, what that story is. I was not at a Bentley dealership.' But I was," she told fans. "The blogs almost [expletive] ruined it!"
Tyga, whose other cars include a $438,000 Rolls Royce Phantom, had gifted Jenner a $200,000 Mercedes Maybach for her birthday in August. He gave the star a $320,000 Ferrari 482 Italia for her birthday the year previous.
"It's not [overwhelming]," the rapper told Hollywood Today Live last month of the pressure to outdo himself each year. "It's just really about what you feel. How do you get [something for] somebody who has everything?"
Jenner and Tyga looked the happy couple at the Boohoo x Jordyn Woods launch event Wednesday evening in Los Angeles. The pair have officially been together for over a year, despite rumors of a split in May.