LeBron James has quite the bone to pick with a California car company … publicly admonishing the joint for “lying” about hooking him up with a new set of wheels.

The Effortless Motors dealership in Riverside shared a clip of a new Bugatti being driven into the back of a truck on Wednesday … featuring a caption claiming the Lakers superstar was its “biggest VIP customer” and congratulating him for “trusting” its business.

James himself eventually got wind of the post … and was quick to call BS on the whole thing on Instagram.

“Stop the [cap]!!” Bron said on Friday. “LIARS!! I don’t know y’all and I don’t even have that car. CLOUT CHASERS.”

A ton of James’ fans then went to the business’ profile and flooded it with hate comments … echoing the four-time champion’s words and bashing it for using his name for its benefit.

Here’s the thing — TMZ Sports spoke with Effortless Motors owner Daniel Ubario … and he admitted it was all just a marketing ploy … and he honestly didn’t expect the post to blow up like it did.

On top of that, Ubario said he’s never worked with LeBron in any capacity in the past — let alone this car in particular.

He also told us he personally reached out to apologize to James over the matter … but so far, he hasn’t gotten a response.

While it might have given the company some more eyeballs, there’s a chance it doesn’t end well … after all, famous folks have had no issue suing the hell outta people for false advertising in the past.