What are the reasons for the failure of the automatic tightening of the seat belt in the BMW 5 Series?
1 Answers
BMW 5 Series seat belt automatic tightening failure is due to long-term use of the seat belt, dirt, loss of spring elasticity, lack of lubrication in the seat belt reel, and the seat belt becoming tangled. Reasons for seat belt tangling: Prolonged use reduces the lifespan, the spring elasticity decreases, and dirt accumulation makes the seat belt stiff, making it difficult to retract and causing tangling. Reasons for loss of spring elasticity in the seat belt: Excessive dirt accumulation at the friction contact point between the seat belt webbing and the B-pillar buckle can cause the seat belt to fail to retract.