It pays to be Justin Bieber‘s BFF … ’cause Sean Kingston tells TMZ the Biebs GAVE HIM

his old chrome-plated Fisker Karma simply because he got bored with it.

Kingston was leaving Boa Steakhouse in Hollywood this weekend when the valet drove up in the

Karma … which Justin initially got as an 18th birthday gift from his manager Scooter Braun.

So … why did Bieber decide to re-gift his super-fast, super-expensive car?

Sean gave us the full explanation (check out the video) … but Kingston should be careful — ’cause

Fisker Automotive recalled roughly 2,400 of the Karmas to fix a defective cooling fan unit that was

the cause of a vehicle fire back in August.

The chrome car has a pretty infamous track record with police — Justin was pulled over in the ride

at least twice … including one time for driving at breakneck speeds on L.A.’s 101 freeway.

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Drive safe!