Drivers are just realizing the secret cop car features even the police don't want you to know - and some are illegal
Michael Green
Published Sep 21, 2026
DRIVERS looking to get their hands on a used cop car have realized there are few key features — including some cops don't want them to know about.
An auto influencer recently took to social media to reveal all the details and hidden hacks in police cars, with a few being illegal.

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Motor vehicle expert The Fast Lane Car (@TFLcar) explained the nuances of driving a used law enforcement vehicle around in a clip with the help of Colorado State Trooper Gabriel Moltrer.
Moltrer noted that the first key feature departments will remove before selling the vehicle is, unsurprisingly, the lighting packages.
"When you purchase [ex-cop cars], normally what they'll do is rip out the lighting packages," he told The Fast Lane Car.
"So anything with the reds and blues, they'll take out because, with normal driving, it's actually illegal to have any type of blue lighting on a vehicle."
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The trooper noted that red lighting is only allowed on the rear of the vehicle but not anywhere else.
"The only red lights you can have on a vehicle are the brake lights, tail lights," Moltrer added.
"Blue is associated with law enforcement."
He continued that several other colors on a vehicle could also be illegal, at least in the state of Colorado, such as purple, as it "could be considered a shade of blue.
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"Green is actually also an emergency-type of vehicle, so that's normally for a command post type of thing," the cop said.
The Fast Lane Car host also questioned the officer about having an amber shade of color similar to construction vehicles on top of the car where the light bar would be, but he advised against it.
Moltrer noted it could only be used in emergencies and that motorists could get in trouble for using it in unauthorized ways.
Additionally, drivers hoping to have a police siren included with their used vehicles are out of luck, as the department strips those out, too, according to Moltrer.
The trooper noted that the sirens are included strictly for police to get others' attention that they're trying to get somewhere fast.
A foghorn is also included in the Colorado State Police vehicles, so used car buyers should settle for the additional noise there instead of the sirens, Moltrer added.
Push bars located on the front of the cop cars, however, could be included in the purchase.
"I look at these kind of like a cattle pusher," the trooper said.
"You know, you can have cattle pushers and everything on there."
Spotlights located on the driver's side window could also be included, as long as they aren't red.
"A lot of people do have spotlights on vehicles, you obviously just can't use it while driving," Moltrer advised.
He also added that they couldn't be used to point at planes in the sky or to hunt animals, at least in Colorado.
For the outside body in general, Moltrer also stressed that no logos are allowed to be placed on the vehicle that could indicate it is a police car, as it would be considered impersonation.
"Any type of badging, any type of wording ... can't have it on a non-police vehicle saying that because that's then inferring that it's a state patrol vehicle," the trooper said.
The last feature that The Fast Lane Car questioned the legality of was hidden inside the former cop car's dash, and it made the daytime running lights flash back and forth, similar to police lights.
Moltrer noted that drivers couldn't use the feature in normal traffic because it would "signify some sort of specialty vehicle," but using them while parked is allowed.
The trooper circled back again to stress no red and blue coloring on the daytime running lights, although one stipulation could see used cop car owners flash them.
He revealed that as long as used police vehicle owners are within the ground of their property, they can flash red and blue lights on any portion of the car.
Outside of that, it's highly illegal.
Read More on The US Sun
For more on car features, check out The U.S. Sun's coverage of how some drivers are now figuring out there's a long-discontinued speed feature in their vehicles.
The U.S. Sun also has the story on a hidden key fob feature that could be life-saving for some motorists.

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