If the tube were perforated, there would be a reduction in braking from the rear wheels, increasing stopping distances.

Service Brakes, Hydraulic — Foundation Components — Hoses, Lines/Piping, And Fittings

Summary
Vehicle description: Sport utility vehicles. The rear brake tube can contact an underbody crossmember eventually wearing a hole in the tube.
Actions
Dealers will install a rubber isolator on all vehicles that do not indicate tube contact. Vehicles that show contact and have less than 45,000 miles and no signs of red rust will have the rubber isolator installed with silicone to protect the tube where the coating has worn off. Vehicles that exhibit contact, and have more than 45,000 miles or show signs of red rust, will have the brake tube replaced with the production tube and isolator.
Documents (6)

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Date Announced
DEC 02, 1999
Vehicles Affected
96,892
NHTSA Campaign #
99V341000
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