Tension cracks may occur on the vacuum pipe to the brake servo in the area of the connections due to a manufacturing fault. Should a vacuum pipe leak the brake servo will loose it's function. This will result in an increase of force which must be applied to the brake pedal. But will not result in a total failure of the braking system.
The brake servo vacuum supply pipe may crack and leak. This could result in a loss of power assistance and require the driver to apply a lot more force to the brake pedal.
出典:NHTSA(米国、パブリックドメイン)、カナダ運輸省(Open Government Licence – Canada)、DVSA(英国、Open Government Licence v3.0)、RappelConso および EU Safety Gate(フランス、Licence Ouverte 2.0)。