Why does seatbelt release but will not move back for restraining when you start car?

If you have a heavy enough object sitting in the passenger seat, the sensor may think a person is sitting there without a seatbelt on....or in a case that I ran into a few years back, a small coin had lodged inside my locking side seat belt. The side with the release button. Or lastly, have you vacuumed your car recently? You may have unplugged your seatbelt sensor wires while vacuuming.
Your car is getting up in age too, so check to see if the retracting spring is still pulling the seatbelt back into its holster, check the general condition of your locks on the belts....not sure if there is a fuse link for a seatbelt system in your car...but you could check your owners manual to see if there is, and while in the manual...check for reasons the seatbelt light comes on too. You can get a copy of your owners manual on line from Nissan or a aftermarket source. Good luck and sorry I couldn't be more specific. Your owners manual or an on line search of the trouble code and the specific working generated by the readout will give some information I'm sure....Work safely please. and beware of air bags when messing with seat safety issues. If you deploy an air bag on yourself while messing with the safety controls.....you could be killed or injured....so be careful.

Most automatic transmission cars/trucks have a solenoid lock on the shifter that requires the brake pedal to be depressed in order to move the shifter out of park. This prevents a child from accidentally knocking the car into gear if the parent is out of the car and the child is inside but not yet restrained. If the solenoid fails the shifter will not move. Most vehicles have a manual override to release the shifter (in case of battery dying, for example). Check the owners manual to see if and where the release button is.

When a seatbelt locks up it is usually due to dirt or corrosion in the automatic locking mechanism. The mechanism can't release because it is under tension. If you get into the cover that houses the release mechanism for the seatbelt, you may be able to hit it with a little wd-40. You do have to release that tension so that the lock will spring back to the open position and allow the seatbelt to retract. Try the lube. Sometimes the galvanized coating on the internal parts causes a seize.

Check with manufacturer on seatbelt warranty. Hondas come with a limited lifetime warranty. I saw an 86 Accord get seat belt fixed under warranty a few years ago. Check with your manufacturers warranty.

If you need further help, reach me via phone at https://www.6ya.com/expert/david_f2436a37cbb50365

The safety belts are sensible to release speed (u have to release it kinda smooth).Also they are sensibile to car inclination (lean) may not release whel when rise/fall position.If locked,u may have to shake a little the belt so the locking spring/balls to unlock.Eventualy ,when driving it can release by itself.One thing is for shure:no sudden moves:it locks again (as in the impact scenario)Cheers

The retractor has to be replaced.

it was recalled check for a recall list get the number take the car to a ford dealership, otherwise there is a spot on the inside of the car near the back seat open and there is a spot to reset by turning the bolt inside the hole. Mine has done the same thing, but on the driver side.

The seat belt should be replaced. Any seatbelt that restrained a driver or passenger during a crash, should be replaced.

The cheapest option would be to check the salvage yards and try and change the parts yourself, get back if you find them and I will email instructions part by part. Chris

To fix that scenario, I have to get to the bolts anchoring the seat belt which can be found under the rear seat. Which a socket wrench, remove the bolt freeing the seatbelt to allow you room to release the lock to pull the belt out from the top of the back seat. You may now push the back seat into its upright position and then refasten the seatbelts with the bolt to it's former position under the back seat.

When I in later times need to lower the back seat, I will either loop the seatbelt around the head rest or tie two belts together allowing for slack in case the belt tightens again when trying to move the seat back to its original position.

.....Very frustrating!!!