Shawn Mendes and Camila Cabellocan rest easy tonight ... because cops believe they've nabbed the crook who broke into their home and made off with Shawn's ride.
Law enforcement sources tell TMZ ... LAPD officers arrested the suspect Thursday for allegedly entering the couple's home last month while they were home. Cops believe the suspect then stole the keys to Shawn's Mercedes G-Wagon and fled in it.
Turns out the key to cracking this case was ... a key! We're told police caught the suspect while following up on a trespassing call they got last week at a home in another area. Cops say that guy had a key on him, which they later discovered was a match to Shawn's G-Wagon.
Our sources say the perp's been booked on 2 felonies — burglary and grand theft auto.