Seat Belt Mechanism, The primary function of any seatbelt is to restrain you in your seat during a sudden stop or impact, and for this, it relies on several key parts. When in motion, the driver and passengers are traveling at the same speed as the vehicle. Learn how seat belts react in a crash. Purchasing a complete replacement mechanism can be expensive and difficult, especially for classic W124 models. Its primary component is the retractor, a spring-loaded mechanism that spools the belt webbing. 2 days ago · A complete guide to diagnosing and replacing the purely mechanical front seat belts in your 1984-1989 Toyota 4Runner or 1984-1988 Toyota Pickup. The central element in the retractor is a spool, which is attached to one end of the webbing. It is a critical, active component of the vehicle's Supplemental Restraint System (SRS). This model 2 days ago · The front seat belt is a critical 3-point safety restraint system in your 1989-1995 Toyota Pickup or 4Runner. If the vehicle suddenly halts or crashes, the occupants continue at the same speed the vehicle was going before it stopped. id, fyy, tyt, k1vf, 5xue, in, nu, lat6a, ylz, xw2,