An off-duty NYPD detective was busted after he was caught with drugs and paraphernalia, authorities said.

Cops pulled over Timothy O’Brien’s car in lower Manhattan just before 2:30 p.m. Thursday, when they discovered a hypodermic needle and two bags of what appeared to be heroin in his sweatshirt pocket, authorities said.

The 35-year-old detective was charged with possession of a hypodermic instrument and criminal possession of a controlled substance.

O’Brien was also charged with driving with a suspended license.