Typical seat belt faults

One of two things typically goes wrong with a seat belt.

1/ The seat belt webbing can become frayed, torn, faded, dog chewed, caught in a car door, cigarette burns, cut, furred edging. All of which can significantly affect the performance of your seat belt in a negative way and will fail a roadworthy inspection every time.

What to do?

Worn webbing, can be replaced by Restraint Technology qualified technicians using Australian Standards approved webbing AS1753. Any hardware such as anchors or webbing retainers can be replaced at this time if rusted or worn but they must comply with Australian Standard AS2596, standard for replacement seat belts.


2/ The seat belt fails to retract into the winding mechanism (retractor) of the seat belt. This occurs when the clock spring (large spring on the side of the retractor) becomes tired and worn out. To comply with Australian Design Rules clock springs must be able to perform 55,000 cycles. (Extraction and retraction = one cycle) Over time the spring can simply wear out if that occurs the entire seat belt retracting mechanism must be replaced, they cannot be repaired.

What to do?

The second problem, of a failed clock spring cannot be repaired and results in the need to replace the entire retractor mechanism with one of our Restraint Technology replacement seat belt retractors. Or if the seat belt is coupled to a pre tensioning pyrotechnic device, generally fitted to airbag vehicles the seat belt retractor must be replaced with a genuine part.


If the seat belt was worn while the car was involved in an accident, both the seat belt and the buckle must be replaced! Seat belts and buckles are designed to work under load only once.

Failing to replace a seat belt and buckle which have been worn in an accident is highly dangerous and could result in the seat belt failing to work if involved in another accident.

In fact some seat belts if used in an accident will not release and the webbing will not pull out from the retractor. Under no circumstances should the retractor mechanism be opened in an effort to release or remedy. This is not approved by the seat belt manufacturer and is highly dangerous if re installed in a vehicle, as again the seat belt will most likely not provide any protection to the occupant.

Note to repairers; Under no circumstances should any attempt be to remove the side covers of a seat belt retractor in order to free up a jammed or worn out clock spring, as the spring is under load and will jump out ally attempting to remove a clock spring cannot be replaced and attempting remove a spring can be highly dangerous as the spring can jump out injuring eyes and or the face.


Next step

Call Restraint Technology on 03 9729 1988 to discuss your seat belt requirements. We perform repairs and replacements all over Australian and no matter where you are we are only an overnight airbag away.

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