Kardashians -- We Don't Need Blac Chyna's Used G-Wagon ... We Have Plenty

Friends of the Kardashians are saying Kris and company are incredulous Blac Chyna would even suggest Kylie would need her hand-me-down G-Wagon, and based on the pic TMZ obtained ... they have a point.

Check out the pic of Kris Jenner's Hidden Hills driveway ... 4 G-Wagons in park and Kylie's is in the shop getting tricked out.

The friends say Kylie got a new, military green G-Wagon several weeks ago and doesn't need a used one as a backup. Short story, the friends say the Kardashians can't believe people aren't buying the fact that Kylie was simply driving Tyga's G-Wagon to her birthday dinner.