The city wants a judge to toss lawsuits filed by several police unions that challenge mandatory sobriety tests for cops who shoot suspects.

Court papers filed yesterday call the Breathalyzer tests “non-intrusive” and “a minimal invasion of the already very limited privacy rights of officers.”

The Manhattan federal- court filing also says the 2007 regulation — ordered a year after the controversial killing of unarmed groom-to-be Sean Bell — “will help assure the public and fellow officers that officers are not discharging their firearms under the influence of alcohol.

“Rumors circulated that an officer involved had been drinking at a club just prior to the shooting,” city lawyer Alan Schlesinger wrote.

A judge later acquitted three undercover detectives of manslaughter and assault charges in Bell’s death.

Twelve off-duty cops have been busted for DWI so far this year.