5 seat belts 2 front 3 rear
No, the 1957 Chevy didn't come with seat belts.
Not if they did not come from the factory with seat belts. If they came form the factory with seat belts you are required to wear them.
Whatever the vehicle came with when it left the factory is what is required.
Yes, they should be the same
Seat belts, yes.
I believe it was the first year of seat belts being standard equipment on the Thunderbird.
Should have factory lap and shoulder belts. AMC changed this in either the '81 or '82 model year, I believe it was '81.
Yes, the 68 VW came with seat belts for both front and back sets. The front seats for the Beetle were 3 point retractable seat belts and lap belts in the rear.
Bolt them in. It's a T-60 Torx I believe. You should be able to just bolt in new seat belts. However, I only have experience with older Jeeps, and I am not sure if the new Wranglers still have this option because of more wiring, etc. I am sure that some Jeep enthusiast will come along, and better awnser your question.
Yes. The only autos not coverd under the seat belt laws are the ones built so long ago that they were not installed at the factory. yes you need seat belts in the jeep however Because of the year of your vehicle you are only required to have what would have normally been installed by the factory in 1973 which would have been the front seat and rear seat single Lap belts. The 3 point shoulder belts that are used today were not required in US vehicles until Feb 1974 so there were many pre 1974 model vehicles with just lap belts and no shoulder belts...
All '03-'12 Jeep Wrangler Rubicons have 4 seat belts. 2 in the front, 2 in the rear.