Why is the ABS light on in a Volkswagen?

[DeKinsley]

The reasons for the ABS light being on in a Volkswagen are: 1. The brake fluid level in the master cylinder reservoir is too low; 2. There is air in the brake system pipelines; 3. The wheel speed sensor is damaged or there is a fault in the wiring; 4. The wheel speed sensor induction ring is damaged or there is debris between the sensor and the induction ring. Volkswagen models include: Magotan, Passat, Tayron, Tharu, Polo, Tiguan L, Touareg, etc. Taking the Volkswagen Magotan as an example, its body structure is a 4-door 5-seater sedan, with body dimensions of: length 4865mm, width 1832mm, height 1471mm, wheelbase of 2871mm, and a fuel tank capacity of 66 liters.