The Guide to Legal Car Modifications in New Jersey

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Those who live in New Jersey or are planning to move to the area need to know the regulations concerning vehicle modifications to ensure their cars or trucks that have been modified are considered street legal when driving on the roadways. The following are the requirements in the state of New Jersey.

Sounds and noise

New Jersey does have regulations on the noises that come from sound systems or the muffler on your vehicle.

Sound systems

Sound systems are not covered by statewide regulations. Individual counties throughout the state have regulations and ordinances that must be followed. Failing to comply with local noise ordinances can result in fines of $2,000 or less.

Mufflers

  • Mufflers are required on all vehicles and must be in working condition to limit unusually loud or excessive noise.

  • Muffler bypasses, cutouts, and similar devices are not permitted on highways.

Tip: Always check with local county laws in New Jersey to make sure you are following any municipal noise ordinances that may be more stringent than state-level laws.

Frame and suspension

New Jersey frame and suspension regulations include:

  • Vehicles cannot be more than 12 feet 6 inches in height.

  • Lifted or elevated vehicles must pass an Elevated Vehicle Inspection.

  • Maximum lift allowed is based on the Gross Vehicle Weight Rating (GVWR) and is measured to the bottom of the door on the driver’s side.

  • GVWR less than 4,501 – Maximum height is 7 inches higher than factory.

  • GVWR 4,501-7,500 – Maximum height is 9 inches higher than factory.

  • GVWR 7,501-10,000 – Maximum height is 11 inches higher than factory.

  • Front lift blocks are not permitted.

  • Suspension system must use the basic elements used by the manufacturer of the vehicle and must follow original geometry of the system.

  • Bumpers cannot be less than 16 inches off the ground.

Engine

New Jersey does not have engine modification or swap regulations, but emissions testing is required.

Lighting and windows

Lights

  • One spotlight is permitted.

  • Two auxiliary lamps are permitted but must be covered when on roadways.

  • Red, amber, and blue LED, strobe or rotating lights require a permit for use as warning lights.

Window tinting

  • Windshield cannot be tinted.
  • No tint is permitted on the front side windows.
  • Back side and rear windows can have any darkness of tint.
  • Side mirrors are required if back window is tinted.
  • Reflective tint is not permitted.

Antique/classic car modifications

New Jersey has historic and street rod plates available for vehicles that are 25 or more years old and only driven for parades, exhibitions, and other similar events.

If you want your vehicle modifications to comply with New Jersey law, YourMechanic can provide the mobile mechanics to help you install the new parts. You can also ask our mechanics what modifications may be best suited to your car using our free online Q&A system, Ask a Mechanic.


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Rigoberto

9 years of experience
706 reviews
Rigoberto
9 years of experience
Chevrolet Equinox - Brake Pads Replacement (Rear) - Niles, Illinois
Rigo was great! He got there early, finished the job early, left everything clean. He changed my rear pads and rotors. The original quoted time was 90 minutes, he was done in about 60. He knows what he is doing and I am recommending him to all my friends and coworkers.
Mercedes-Benz C250 - Brake Pads Replacement (Front, Rear) - Chicago, Illinois
Rigo is a maverick hands down. Don’t take your car for work elsewhere. Especially great at Mercedes—this guy knows his profession! I will be using him for everything related to my car going forward.

Arturo

25 years of experience
35 reviews
Arturo
25 years of experience
Kia Forte - Brake Pads Replacement (Front) - San Diego, California
ARTURO is great! very professional , fast, replaced my front brake pads and oil an filter change. everything now works and works well. Brakes have much improved stopping power and engine is smooth and quiet.Arturo is also kind and thoughtful. "Your mechanic" is very fortunate to have Arturo Lopez represent your company. I enthusiastically recommend him and "Your mechanic> as a fine operation Best regards to the Team Peter Marto
Nissan Maxima - Brake Pads Replacement (Front, Rear) - San Diego, California
Arturo was prompt and completed my brake repair, including new rotors in a very efficient manner. I am very pleased with the quality of the work and the parts and will definitely look to have him service our other car in the near future.

Scott

32 years of experience
345 reviews
Scott
32 years of experience
Lexus IS250 - Brake Pads Replacement (Rear) - Denver, Colorado
Always on time, speedy, professional, and pleasant to interact with. The work is always consistent and we'll done. I can't reccomend Scott highly enough!

Michael

10 years of experience
15 reviews
Michael
10 years of experience
Nissan Sentra - Brake Pads Replacement (Front) - Conyers, Georgia
He was promptly on time and got the job done efficiently in a timely manner. I really appreciate the rapid respone on getting the job done! I would most definitely use this service again.

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