The pretensioner mechanism uses an explosive charge to drive a concealed piston when sensors detect the signature abrupt deceleration of an accident. This extra seatbelt “pre-” tension, moments prior to the full force of impact, pulls the bodies of the driver and front-seat passenger firmly into their seats.
In this way, what does a seat belt tensioner do?
A seat belt pretensioner is a part of the seat belt system that locks the seatbelt in place in the event of a crash. It is an addition to the basic seatbelt of a vehicle that has been proven to reduce the number of injuries and deaths from crashes.
Subsequently, question is, do all seat belts have pretensioners? The idea of a pretensioner is to tighten up any slack in the belt webbing in the event of a crash. Whereas the conventional locking mechanism in a retractor keeps the belt from extending any farther, the pretensioner actually pulls in on the belt.
Also, can seat belt pretensioners be reset?
The seat belt pretensioner can be reset to factory settings and replaced into the vehicle. To accomplish this, they replace the gas charge, sensor, spring, and any other faulty parts and rebuild the entire seat belt mechanism. Quality is definitely the top priority of Safety Restore.
How do you reset a seatbelt retractor?
How to Reset a Stuck Seatbelt
- Pull on the seatbelt to try and release it from its auto-lock function.
- Pry off the plastic covers that hold the seatbelt mechanism with a screwdriver or needle nose pliers.
- Pull the seatbelt out completely.
- Untangle the seatbelt if there are any jams in it.
- Allow the seatbelt to roll back into place.
9 Related Question Answers Found
What is a seat belt retractor pretensioner?
Seat Belt Pretensioners Types: A pretensioner is a device that is connected to the safety belt buckle, safety belt retractor or/and and outboard lower safety belt anchor assembly. The pretesioner tightens the seat belt during certain crashes. Pretensioners may deploy with or without airbag deployment.
How does the seatbelt work?
A seatbelt spreads the stopping force needed to decelerate the passenger across their body. This prevents the body from hitting the windshield or steering column of a car at high speed, which could easily result in injury or death.
How much does it cost to replace a seat belt pretensioner?
Seat Belt Pretensioner Replacement Cost The replacement cost of a seat belt pretensioner is around $150 to $200. The cost of the parts is about $50 to $100 while the cost of the labor is about $100 to $125.
What is a seat belt made of?
So the seat belt webbing material made of polyester and woven from about 300 warp strands and one weft strand. The width of the webbing is about 48mm and has a tensile strength sufficient to support approximately three metric tons.
Will airbag deploy if seat belt not?
The airbag light in a vehicle ties into this system. However, in many vehicles the airbags will still deploy whether or not an occupant is fastened by a safety belt. Unfortunately for the occupant, not wearing a seat belt and crashing into an airbag can yield much more serious injuries than if a seat belt were worn.
What is pretensioners and force limiter seatbelt?
Seat belt with pretensioner and Load limiter. A pretensioner is designed to retract some of the webbing of a seatbelt the instant a collision occurs, tightening the seatbelt to restrain occupants quickly and reducing the amount they are thrown forward in a moderate or severe frontal crash.
Can seat belt retractors be repaired?
A seat belt retractor repair is the process of unlocking the locked seat belt, rebuilding the mechanism, replacing the gas charge and installing a new sensor. The repair process will restore the seat belt retractor back to factory condition making it work like new.
Can a seatbelt be repaired?
Before the Repair Regardless of whether it’s the seatbelt retractor, or the buckle pre-tensioner, once activated, they will not work again. All locked and disabled seatbelts must be replaced to restore this critical component of the vehicle’s safety system to factory condition.
Why do seatbelts lock after an accident?
Just to amplify on some other answers: Seat belts lock in a collision. They lock because of the sudden load placed on them (your body accelerating forward) – you can check this as mechanics do by just jerking very quickly on the loose belt and it will suddenly lock – or because of sudden movement of the vehicle.